UC-NRLF ■111 HHBHHHHHHHHIHIHii This book is due on the last date stamped below» km . fid ELECTRICALLY OPERATED IRRIGATION PLANTS FOR THE STATE OF CALIFORNIA ^www.archive.org/details/electricallyoperOOgenerich ;Mr b be fcw! *" ° n th ° &« **• «m« Electrically Operated Irrigation Plants FOR THE STATE OF CALIFORNIA A HANDBOOK OF USEFUL INSTALLATION DATA GENERAL ELECTRIC COMPANY SCHENECTADY, N. Y. NOVEMBER, 1919 For pumping plant reliability demand General Electric equipment Y-1319 TABLE OF CONTENTS Page General Description of 220- or 440-volt, Three-phase Installation 7 General Description of 2200-volt, Three-phase Installation 12 Lighting 25 Motor Starting Devices 26 Starting Compensators 26 Type FP-10 Oil Circuit Breakers 28 Type FK-20 Oil Circuit Breakers 33 Wiring Data 35 Table I— Type RI Induction Motors, Single-phase, 220 Volts 35 Table II — Type KT Induction Motors, Three-phase, 220 Volts 35 Table III — Type KT Induction Motors, Three-phase, 440 Volts 36 Table IV— TypeKTInductionMotors,Three-phase,2200 Volts 36 Table V— Ground Wire Sizes 36 Table VI — Table of Allowable Carrying Capacities of Wires 37 Table VII — Size of Conduits for the Installation of Wires and Cables 38 Table VIII — Conduit Table Giving Sizes of Conduit which will be Required for Various Combinations of Wires .... 39 General Information on Centrifugal Pumps 40 Hydraulic Data 42 Table IX — Approximate Capacities and Efficiencies of Centrifugal Pumps for Various Heads 44 Table X— Conversion Table 44 Table XI — Recommended Sizes of Pipe for Various Lengths of Discharge Line 45 Table XII — How to Determine Total Head of a Pumping Plant in Operation 45 Friction of Water in Pipes 46 Formula for Calculation of Approximate Quantity of Water Flowing in Open Ditch or Flume 46 Table XIII — Friction Head of Water for Various Pipe Sizes 47 Table XIV — Data on Leather Belt Transmission '. 48 Belt Centers, Widths, Speeds 49 Width of Belt in Relation to Width of Pulley Face 49 Pump and Motor Specification Sheets 50 Pump and Piping, Pit, Motor 50 Wiring— 220- or 440-volt, Single- or Three-phase Plant 51 Wiring— 2200-volt, Three-phase Plant 51 Priming Equipment 52 Motor 52 Priming Motor Transformers 52 Type H 52 Lighting 52 For pumping plant reliability demand General Electric equipment a 3 B o O o W PREFACE The essential considerations in a pumping plant installation are reliability, safety and economy. The object of this booklet is to supply information as a guide to the selection and installation of equipment for electrically oper- ated irrigation plants, in the State of Califor- nia, which meet these requirements. In presenting this information, it is our aim to outline definite standards which, if followed, will result in a successful installa- tion. The General Electric Company offers a complete line of electrical equipment which will accomplish these results. Should you require information beyond the scope of this booklet our engineers will gladly assist you. For pumping plant reliability demand General Electric equipment GENERAL DESCRIPTION OF 220- OR 440-VOLT, THREE-PHASE INSTALLATION Irrigation pumping plants, as generally installed, consist of an elec- tric motor connected to a centrifugal pump set in a pit near the water level. Fig. 1. Pumping Plant Installation Arranged for 220- or 440-volt, Three-phase Motor Centrifugal pumps are built in two styles, horizontal and vertical, and are usually arranged for either direct or belt connection depending upon the conditions to be met. Fig. 1 shows the complete electrical installation for a plant employ- ing three-phase alternating current at either 220 volts or 440 volts. For pumping plant reliability demand General Electric equipment 7 Transformers provided with cutouts are mounted on a pole near the pump house for reducing the voltage to that required by the motor. Wires extend from the pole and terminate on insulators outside of the building. For the protection of the wires a conduit (Fig. 2) (#fc) Green- Fig. 2. Greenfielduct Conduit fielduct provided with a weatherproof entrance fitting, should be installed from the point of connection to the power company's lines to the main entrance switch; all three wires being run in the same con- Safety First Switch duit. About three feet of wire should be allowed for the connection to the power company's wires. All wire should be (^|) Red Core rubber covered. The main entrance switch (Fig. 3) should be of the ^ externally operated fused type enclosed in an iron box to prevent accidental contact with any of the live parts. It should be located not more than For pumping plant reliability demand General Electric equipment seven feet above the floor and arranged to cut off all the current used in the pump house. ($4) cartridge fuses (Fig. 4) of the size shown in the tables, should be provided with the switch. From this point the wires, provided with proper fittings and enclosed in conduit, vffc} Greenfielduct, should extend to the location of the power company's meter. Fig. 4. ($4) Cartridge Fuse Depending upon the requirements of the power company supply- ing service, there should be provided either a meter board built of one-inch surfaced lumber properly painted, or a metal cabinet complete with door. These should be of ample dimensions to accommodate the Fig. 5. FP-10 Oil Circuit Breaker metering apparatus provided by the power company. Not less than 36 inches of wire should be allowed to make the connections. From the meter location the conduit, $&) Greenfielduct, should extend to the location of the motor starting device. For motors 5 h.p. and smaller this will consist of a ^& Type FP-10 oil circuit breaker (Fig. 5) equipped with under-voltage and overload For pumping plant reliability demand General Electric equipment 9 Fig. 6. Type CR 1034-Form Al Compensator Fig. 7. Standard Skeleton-frame Induction Motor For pumping plant reliability demand General Electric equipment 10 protective features. For the installation of this device there should be provided a piece of 1-in. by 12-in. surfaced lumber fastened to the pump house wall and to which the circuit breaker is bolted. For motors 73^2 h.p. and larger the motor starting device will consist of a $£} Type CR 1034-Form Al (Fig. 6) compensator Fig. 8. Polyphase Vertical Induction Motor equipped with under-voltage release and overload relays. This should be bolted to 2-in. by 4-in. surfaced timbers which are fastened to the pump house wall. Fig. 9. Greenfield Flexible Steel Conduit From the motor starting device the conduit, VMj) Greenfielduct, should extend in a continuous length to the location of the motor (Fig. 7 and 8) and be fastened to the conduit terminal (Fig. 7). If the motor is direct connected to the pump, the rigid conduit can be connected directly to the fitting. If the motor is belted, it will be necessary to provide not less than 18 inches of $4) Greenfield For pumping plant reliability demand General Electric equipment 11 flexible steel conduit (Fig. 9) to make the connection to the conduit terminal. ^ r> ^ All joints in conductors should be soldered and insulated with (g|) Splicing Gum and ($|) Acme Tape and then painted with insulating paint. A wire fastened to the conduit by means of a ground clamp should be connected to the suction pipe of the pump. If the conduit is not run continuously, the separate sections should be bonded together in a similar manner. Fig. 10. R-l Single-phase Motor with Sliding Base Where single-phase motors (Fig. 10) are installed, the above information applies, except that two instead of three wires are run to the motor and a special outlet box must be provided to cover the motor terminals where connection is made to the conduit. The proper sizes of switches, wire, fuses and conduit for the various horse power motors are shown on page 35. NOTE. — Where motors larger than 100 h.p. are operated from 440 volts, it is recommended that a (g|) K-5, 600-volt, triple-pole, single- throw oil circuit breaker (Fig. 11) equipped with under- voltage release and overload relays mounted in a manner similar to that shown in Fig. 12 for 2200-volt plants, be employed instead of the usual externally operated enclosed knife switch. GENERAL DESCRIPTION OF 2200-VOLT, THREE-PHASE INSTALLATION In the larger installations where the lower voltages would involve excessive wire sizes, it becomes desirable to operate the motor at a higher voltage. This voltage is usually 2200 for the motor driving the For pumping plant reliability demand General Electric equipment 12 main pumping unit. The priming pump motor and the lighting are supplied through transformers mounted in the pump house and arranged to change the voltage from 2200 volts to 110 or 220 volts. When 2200 volts are employed it is necessary, in order to safeguard employees and equipment, to install wiring of a higher standard than Fig. 11. FK-5 Oil Circuit Breaker that used in plants of the 220- or 440- volt class. Fig. 12, 13 and 14 show the complete electrical installation for a plant employing three-phase current at 2200 volts for the main pump motor, 220 volts for the priming pump and 110 volts for lighting. The power company's wires terminate on insulators at the outside of the building. Three holes 8 in. by 8 in., arranged as shown in Fig. 13, should be provided in the side of the house for the incoming wires. Surfaced For pumping plant reliability demand General Electric equipment 13 8"L'ntrance Fig. 12. Elevation, Typical Fig. 13. Section Through 2200-volt Installation Typical 2200-volt Installation {For pumping plant reliability demand General Electric equipment 14 timbers 4 in. by 4 in. are fastened to the inside of the house by means of bolts. On these are mounted metal pins and 2200-volt porcelain insulators (Fig. 15) for the support of the wires. The wires extend to the top of the switchboard panel where they terminate as shown. Transformers 3-0 ^saqps 6'-0" Compensator f O ne o f Afoto r . Foundat/on Fig. 14. Plan of Typical 2200-volt Installation A 1-in. surfaced board of ample dimensions for the reception of the power company's current and potential transformers is fastened to the wall and the timbers and the pins and the insulators as shown, are provided to terminate the wires. Not less than 36 inches of wire Insulator at each point should be allowed for the connections to the power com- pany's incoming lines and the installation of the metering apparatus. Connections are run from the incoming lines to $1) Type LG-16, 2500-volt, back connected disconnecting switches (Fig. 16) which For pumping plant reliability demand General Electric equipment 15 are mounted on iron cross supports fastened to the switchboard frame. These switches completely disconnect all live wires in case any work has to be done in the pump house or on the high voltage wires. Fig. 16. LG-16 Disconnecting Switch A ($£) switch hook (Fig. 17) should be kept in the pump house for the purpose of opening the switches. From the disconnecting switches the wires extend to a ^^ Type FK-5, 2500- volt, triple-pole oil circuit breaker (Fig. 18). This circuit breaker, which is provided with overload and under-voltage Fig. 17. Cat. No. 65849 Switch Hook (not shown) protective features, is mounted on a lj^-in. dull black marine slate panel complete with subbase fastened to a 1 H-in. frame. The 110-volt current for the operation of the under-voltage release is obtained from the lighting circuit. The wires from the oil circuit breaker are connected through ($|) Type PC-146 series overload relays (Fig. 19) to the motor starting device which consists of a wfa Type CR 1034-Form Al starting compensator (Fig. 20) mounted on a 1 3^-in. angle iron frame located alongside the switchboard panel. These angle iron frames are fastened to a 3-in. channel iron base which in turn is bolted to the floor, and braces are provided back to the wall. From the motor starting device the wires extend to the location of the motor terminals. ♦ For pumping plant reliability demand General Electric equipment 16 All wiring connections from the incoming lines to the motor starting device should be $&) 3000-volt braided varnished cambric cable (Fig. 21). The wiring from the motor starting device to the motor should be (gfo) 3000-volt triple conductor lead covered varnished cambric cable (Fig. 19). The lead covering is to prevent short circuit- Fig. 18. FK-5 Oil Circuit Breaker ing of the wires in case moisture should get into the conduit (Fig. 22) in which they are enclosed. The conduit, (Mk Greenfielduct, which should be equipped with bushings at each end, extends continuously from the motor starting device to the motor (Fig. 23) and is to protect the cable against mechanical injury. The cable should be provided with (g|) mechanically fastened end bells* (Fig. 24) which are filled with G-E No. 227 insulating com- * Cable terminal. For pumping plant reliability demand General Electric equipment 17 Fig. 19. Type PC-146 Relays Fig. 20. CR 1034-Form Al Compensator For pumping plant reliability demand General Electric equipment 18 pound in order to protect the wires and prevent the entrance of mois- ture into the cable. A No. 16 gauge galvanized iron box with screwed cover should be provided around the end bell at the motor end of the cable and a similar box should be fastened to the motor to enclose the motor terminals. HHHHHr Fig. 21. Varnished Cambric Cable These boxes are to be connected by means of ($£) Greenfield flexible steel conduit (Fig. 25). The length of this conduit will be dependent on whether the motor is belted or direct connected to the pump. As 2200 volts is not suitable for the operation of the priming pump motor it is necessary to provide transformers to reduce this to 220 volts. Either two or three ($£) Type H transformers (Fig. 26) of Fig. 22. Greenfielduct Conduit proper capacity rated 2200 volts primary, 220/110 volts secondary, should be mounted on the rear wall of the house as shown in Fig. 14. For the mounting of the transformers 4-in. by 4-in. surfaced timbers are bolted to the frame of the house. These transformers, which are mounted on iron hangers are connected to the incoming lines through ^ Cat. No. 104227 fused cutouts (Fig. 27). For the purpose of For pumping plant reliability demand General Electric equipment 19 disconnecting the transformers from the incoming lines, there should be kept in the pump house a ^ Cat. No. 158354 plug puller (Fig. 28). All wires used in conjunction with the priming pump motor and lighting installation should be ($& Red Core rubber covered. Fig. 23. Polyphase Induction Motor Connections should be run from the 220/ 110- volt leads on the transformers to fused knife switches located on the subbase of the main switchboard. The wires should be enclosed in (fifci Greenfielduct Fig. 24. Mechanically Fastened End Bell For pumping plant reliability demand General Electric equipment 20 conduit, which is fitted with proper terminal fittings complete with porcelain covers. Fig. 25. Greenfield Flexible Steel Conduit A (g|) Type LD-22 triple-pole, single-throw fused switch (Fig. 29) of proper capacity should be provided to control the circuit to the priming pump motor. Fig. 26. Type H Transformer The wires to this motor, enclosed in (|§) Greenfielduct conduit equipped with proper terminal fittings, should extend to the location °f a (g|) Type FP-10 oil circuit breaker (Fig. 5 and 30) provided with For pumping plant reliability demand General Electric equipment 21 under-voltage and overload protective features. This should be mounted on a 1-in. surfaced board bolted to the frame of the pump house. From this circuit breaker the wires should extend in conduit to tfie motor conduit terminal (Fig. 31). Fig. 27. Cat. 104227 Cutouts A $4) Type LD-22 double-pole, single-throw fused knife switch (Fig. 29) of 30-amp. capacity should be provided to control the lighting and under-voltage release circuits. Fig. 28. Cat. No. 158534 Plug Puller Fig. 29. LD-22 Switch The main switchboard panel should be drilled for the mounting of the power company's watt-hour meters. Wires in (|fe) Greenfielduct conduit, provided with proper terminal fittings, should extend from the meter board to the power company's meter, allowing 18 inches of wire at each end for connections. All For pumping plant reliability demand General Electric equipment 22 joints should be soldered and if made in 3000-volt wiring, should be insulated with (g|) bias varnished cambric tape. Similar insulation should be used on all 2200-volt exposed current carrying parts. If Fig. 30. FP-10 Oil Circuit Breaker made in 220-volt wiring, they should be insulated with 6$p splicing gum and wfe) Acme tape. In either case the finished joint should be given a coat of insulating varnish. Fig. 31. Motor Conduit Terminal Box A ground wire connected to the suction pipe of the pump should be provided and wires connected to it and to the following pieces of apparatus: 1. The secondary wiring of the power company's meter trans- formers. 2. The compensator cases. 3. The oil circuit breaker case. 4. The switchboard frame. 5. The lighting transformer cases and the neutral of the same. 6. The lead sheath of the cable and all conduits. For pumping plant reliability demand General Electric equipment 23 These connections should be made either to approved type ground clamps or lugs bolted to the apparatus. To provide against accidental contact with any of the live parts at the rear of the main switchboard barriers should be provided. Power Cos Transformers Power Cos Meter Installation Mo/n Pump/ng Motor Fig. 32. One Line Diagram of Connections, 2200-volt Plant The space above and below the motor starting device should be covered with No. 16 gauge dull black finish steel plate screwed in place. At each side of the board provide a wooden barrier made of %-in. by 2-in. battens not less than 8 ft. high and spaced 3 in. apart. They should be securely fastened in place and set not nearer than six inches to any live part. For pumping plant reliability demand General Electric equipment 24 The diagram of connections is shown in Fig. 32. The proper sizes of switches, cables and conduit for the various 2200-volt motors are shown on page 38. The proper sizes of switches, wire and conduits for the various horse power, 220-volt priming pump motors are shown on page 37. LIGHTING It is desirable in all cases to provide artificial light in pump houses for purposes of inspection. For the smaller installations the equipment falls in two classes. In surface type plants this may consist of a 50-watt Edison MAZDA lamp complete with a (||) Ivanhoe 822 holder and (gp Ivanhoe D.P.D. 40 shade mounted nine feet above the floor as shown in Fig. 33. Fig. 33. Mazda Lamp with Reflector In plants having pits similar equipment should be provided on the surface and an 18-in. gooseneck similarly equipped to the surface outlet should be provided on the side wall of the pit about nine feet above the floor. In each case these outlets should be controlled by means of a (||) Cat. No. 60449 snap switch located at the entrance to the pump house. In the larger plants the above equipment should be increased in size. The lamps should be ^ 75- watt Edison MAZDA "C" with (g&) Ivanhoe R.E.D.D. 75 reflectors. In addition it is desirable to provide a (g&) 543 attachment receptacle to permit of the use of an inspection lamp. All wiring should be run in (ga) Greenfielduct conduit using proper style (gl) Sprague boxes, at the various outlets. For pumping plant reliability demand General Electric equipment 25 In the 220-volt plants current can be taken from the incoming lines through a <3fa Cat. No. 102928 fuse switch complete with 6-amp. (jfe) cartridge fuses and mounted in a metal cabinet located adjacent tothe meter cabinet. In these cases 220-volt lamps can be used. Fig. 34. Type CR 1034-Form Al Compensators In the 440-volt plants it will be necessary to provide a (g|) Type H transformer mounted and connected in a similar manner to that noted under 2200-volt plant installations. In the 2200-volt plants the current can be taken from the trans- formers used for the priming pump motor. In these two latter classes of plants 110-volt lamps will be used. MOTOR STARTING DEVICES STARTING COMPENSATORS Starting compensators are furnished with all motors 7 l A h.p. and larger. They reduce the heavy inrush of current which would other- wise occur if no compensator was employed. They consist of an auto- For pumping plant reliability demand General Electric equipment 26 transformer enclosed in an iron case and an oil circuit breaker to make the connections to the circuit and are provided with overload relays and under-voltage release to prevent damage to the motors in case of loads or failure of line voltage. Fig. 35. Overload Relay Panel They are made in two styles as shown in Fig. 34 and are ar- ranged for all mounting. They are arranged for conduit wiring. On both types overload relays are provided. Their function is to protect the motor against continued overloads or single-phase operation. Used in place of fuses, they soon pay for themselves. Adjustment of the relays can be made without uncovering any live parts. Existing plants using motor starting devices equipped with fuses and having under-voltage releases can secure better protection at less cost by installing these overload relays (Fig. 35) mounted on a panel instead of using fuses. Type CR 1034-Form Al compensator can be provided with an ammeter in addition to the overload relays. The ammeter (Fig. 36) as For pumping plant reliability demand General Electric equipment 27 a part of the compensator equipment is a valuable safeguard in in- suring that the motor is not working at an overload due to abnormal friction or other causes, an increase in the ammeter reading being a direct indication of the overload. The transformers in the case are provided with taps to enable the voltage impressed on the motor to be changed to suit the starting conditions. When the compensator is shipped from the factory the starting connection is made to the second tap nearest the core. Fig. 36. Type R-6 Ammeter All compensators are arranged so that all connections and live parts are totally enclosed. A tripping button operated from the outside is provided to open circuit the compensator. Fig. 37 and 38 show diagrams of connections for starting com- pensators, 220 or 440 volts, and 2200 volts. TYPE FP-10 OIL CIRCUIT BREAKERS In the case of motors 5 h.p. and smaller where the inrush of cur- rent at starting is not objectionable, ($p Type FP-10 oil circuit breakers (Fig. 39a) are used to protect the motor against continued overloads, single-phase operation or failure of line voltage. This is accomplished by means of time limit overload protective plugs and under-voltage release. The time limit overload plugs (Fig. 40) are connected in series with the motor circuit and are designed so that excessive current, due to the overload, heats the post A. This in turn is transmitted to the fusible joint which melts, thereby opening the circuit and causing the motor to shut down. For pumping plant reliability demand General Electric equipment 28 Push Button Overload Relay Generator Open Here for External Push Button -Tap No.l is next to tore and is lowest %Tap Cable Clamp Running Side Off Startmg Side Tap No. 4--* TapNo.3-H Tap No. 2 -TapNal ICorcl i Coil —Finish Tap No, 4 Tap No. 3 Tap No. 2 Tap No.l ?— Start I I I KFinish Standard Induction Motor Compensators have "-•—Start 3Taps up toZOH.R 4Taps20H.Pand above fnnnorfflHY Other Compensators mau have 2, 3, 4or 5 Taps ConnectedY Depending on service. y Fig. 37. Connections of Three-phase CR 1034 Form Al Starting Com- pensator with Under-voltage Release and Overload Relays for 220- or 440-volt Circuits For pumping plant reliability demand General Electric equipment 29 Push Button Generator Potentia Transformer Open Here for Externa I Push Button i — Tap No.l is next to Core and is lowest % Tap TapNo4.-* Tap No ZM j Tap No Z ' L TapNo.H r ICoTel I Coil Fig. 38. Starting Side •♦-Finish TaplMo.4 TapNo.3 TapNo-2 TapNo.l Start Finish Standard Induction Motor Compensators have Start 3Taps up to 20H.P, 4Taps20H.Rand above Other Compensators may have 2,3, 4 or 5 Taps Depend i ng on ser vi ce Connections of a Three-phase CR 1034 Form Al Compen- sator with Under-voltage and Overload Release for 2200-volt Circuits For pumping plant reliability demand General Electric equipment 30 These circuit breakers can also be furnished with overload relays and under-voltage release (Fig. 39b). (a) Fig. 39. FP-10 Oil Circuit Breakers (b) Fig. 41 shows the diagram of connections for a Type FP-10 oil circuit breaker using time limit overload protection plugs and under- voltage release for either 220 or 440 volts. Fig. 40. Time Limit Protective Plugs, 220-440 Volts For pumping plant reliability demand General Electric equipment 31 220 Vo/ts 440Volte Fig. 41. Wiring for Triple-pole FP-10 Oil Circuit Breaker Using Under-voltage Release and Time Limit Protective Plugs — 60 Cycles Fig. 42. Type FK-20 Oil Circuit Breaker with Series Trip Coils and Under-voltage Release For pumping plant reliability demand General Electric equipment 32 TYPE FK-20 OIL CIRCUIT BREAKERS Many existing plants have the older type of motor starting devices equipped with fuses and without under-voltage release. In order to provide complete protection against continued over- loads or single-phase operation, a $1) Type FK-20 oil circuit breaker (Fig. 42) can be installed ahead of these motor starting devices. . It is Z20Mts 440Vo/ts Fig. 43. Wiring for Triple-pole Type FK-20, 220- and 440- volt Oil Circuit Breaker Using Double Series Trip and Under-voltage Release equipped with protective features in the form of under-voltage release and overload relays and its use will make an old installation up-to-date. Fig. 43 shows a diagram of the connections for a (g|) Type FK-20 oil circuit breaker for either 220 or 440 volts connected to provide protection to a plant having the old style motor starting devices. Fig. 44 shows a similar installation for 2200 volts. For pumping plant reliability demand General Electric equipment 33 Under /o/tege -fie/ease *L7 'IZ '13 0// _ £/rcu/'t Breaker Potent/a/ Transformer Motor 5tarting Device Motor Fig. 44. Wiring for Type FK-20 Oil Circuit Breaker, 2200 Volts, with Double Series Trip and Under-voltage Release For pumping plant reliability demand General Electric equipment 34 WIRING DATA The following tables show the suggested sizes of wires, conduits, fuses, entrance switches, etc., to be used with motors of the voltages and horse powers noted: TABLE I @£h TYPE RI INDUCTION MOTORS— SINGLE-PHASE 220 VOLTS Full Size of Size Size of Wire B.&S. Gauge Size of H.P. Load Switches Start Conduit Current in Amp. Fuses in In. 1 5.9 30 20 14 l A 2 10.7 60 30 10 H 3 14.5 60 40 8 l 5 23 60 60 6 l 7*A 32.5 100 75 4 1« 10 42 100 100 2 IX TABLE II TYPE KT INDUCTION MOTORS— THREE-PHASE 220 VOLTS Full Size of Size Size of Wire B.&S. Gauge Size of H.P. Load Switches Start Conduit Current in Amp. Fuses in In. 1 3.4 30 15 14 H 2 6.2 30 25 12 H * 3 8.8 30 30 10 X * 5 14.2 60 50 8 l 7^ 18.9 60 50 6 IH 10 25 100 70 6 IH 15 38 100 90 4 IX 20 49 200 125 2 IX 25 61 200 150 1 W2 30 73 200 175 2 40 97 200 225 00 2 50 122 400 275 000 2X 75 178 400 350 300 MCM 2X 100 244 600 500 400 MCM 3 * These size motors are those usually employed for priming pumps in the larger installations. For pumping plant reliability demand General Electric equipment 35 TABLE III TYPE KT INDUCTION MOTORS— THREE-PHASE 440 VOLTS Full Size of Size Size of Wire B.&S. Gauge Size of H.P. Load Switches Start Conduit Current in Amp. Fuses in In. 1 1.7 30 10 14 H 2 3.1 30 15 14 j/^ * 3 4.4 30 20 14 j^ * 5 7.1 30 20 12 H 7H 9.5 30 25 10 H 10 12.5 60 30 8 l 15 19 100 40 6 iH 20 24.5 100 80 6 IX 25 30.5 100 90 4 IX 30 36.5 100 90 4 IX 40 48.5 200 150 1 1H 50 61 200 150 1 IK 75 89 200 200 2 100 122 400 325 0000 2H 150 180 400 475 400 MCM 3 200 247 600 500 500 MCM 3 * These size motors are those usually employed for priming pumps in the larger installations. TABLE IV $£)TYPE KT INDUCTION MOTORS— THREE-PHASE 2200 VOLTS H.P. Approxi- mate Full Load Current in Amp. Size of Oil Circuit Breaker in Amp. K-5, K-20 Capacity Relays K-5 Oil Circuit Breaker Capacity of Series Coils K-20 Oil Circuit Breaker Size of Wire B.&S. Gauge Size of Conduit in In. 20 6.0 60 10 6 14 1 25 7.2 60 10 8 12 IX 30 8.5 60 10 10 12 IX 40 11.2 60 15 12 10 IX IX 50 12.5 60 15 12 8 75 20 60 20 20 8 IX 100 26 60 25 25 6 \ X A 150 38 60 40 40 4 IV2 200 50 60 50 60 1 2 TABLE V GROUND WIRE SIZES Copper wire should be used of a size not smaller than that indi- cated below. Size of Cutout in Amperes Size of Wire 0- 60 60-100 100-200 201-600 No. 10 No. 8 No. 6 No. 4 Fuses are automatic cutouts For pumping plant reliability demand General Electric equipment 36 TABLE VI TABLE OF ALLOWABLE CARRYING CAPACITIES OF WIRES The following table, showing the allowable carrying capacity of copper wires and cables of 98 per cent conductivity, according to the standard adopted by the American Institute of Electrical Engineers, must be followed in placing interior conductors. For insulated aluminum wire the safe carrying capacity is 84 per cent of that given in the following tables for copper wire with the same kind of insulation. B.&S. Gauge Number Diameter of Solid Wire in Mils Area in Circular Mils Table A Rubber Insulation Amperes Table B Other Insulation Amperes 18 40.3 1,624 3 5 16 50.8 2,583 6 10 14 64.1 4,107 15 20 12 80.8 6,530 20 25 10 101.9 10,380 25 30 8 128.5 16,510 35 50 6 162.0 26,250 50 70 5 181.9 33,100 55 80 4 204.3 41,740 70 90 3 229.4 52,630 80 100 2 257.6 66,370 90 125 1 289.3 83,690 100 150 325.0 105,500 125 200 00 364.8 133,100 150 225 000 409.6 167,800 175 275 200,000 200 300 0000 460.0 211,600 225 325 300,000 275 400 400,000 325 500 500,000 400 600 600,000 450 680 700,000 500 760 800,000 550 840 900,000 600 920 1,000,000 650 1000 1,100,000 690 1080 1,200,000 730 1150 1,300,000 770 1220 1,400,000 810 1290 1,500,000 850 1360 1,600,000 890 1430 1,700,000 930 1490 1,800,000 970 1550 1,900,000 1010 1610 2,000,000 1050 1670 1 mil =0.001 inch. For pumping plant reliability demand General Electric equipment 37 TABLE VII SIZE OF CONDUITS FOR THE INSTALLATION OF WIRES AND CABLES Number of Conductors One Two Three Four Conductor Conductors Conductors Conductors in a in a in a in a Conduit. Conduit. Conduit. Conduit. Size Size Size Size Conduit Conduit Conduit Conduit in In. in In. in In. in In. Size B.&S. Electrical Electrical Electrical Electrical Trade Trade Trade Trade Size Size Size Size 14 X K H H 12 X % X % 10 x % % i 8 x l IX i 6 % l IK IX 5 % IX IX IX 4 8 IX IX IK 3 X IX IX IX 2 X IK IK 1 H IK IK 2 l IK 2 2 00 l 2 2 2K 000 l 2 2 2« 0000 CM. IX 2 2K 2K 200,000 IX 2 2K 2K 250,000 IX 2K 2K 2X 3 300,000 IX 2K 3 400,000 IX 3 3 3K 500,000 IX 3 3 3K 600,000 IX 3 3K 700,000 2 sy 2 3K 800,000 2 3K 4 900,000 2 3K 4 1,000,000 2 4 4 1,250,000 2V 2 4K 4K 1.500,000 2 l A 4K 5 1,750,000 3 5 5 2,000,000 3 5 6 For sizes not greater than No. 10 B.&S. gauge, one more conductor than permitted by the above table may be installed in the specified conduit, provided the conduit is not longer than 30 feet, and has not more than the equivalent of two quarter bends from outlet to outlet, the bends at the outlets not being counted. For pumping plant reliability demand General Electric equipment 38 TABLE VIII CONDUIT TABLE GIVING SIZES OF CONDUIT WHICH WILL BE REQUIRED FOR VARIOUS COMBINATIONS OF WIRES Size in In. Area Hin. Kin. 1 in. \% in. IH in. 2 in. 2^ in. 3 in. 3y 2 in. 4 in. 5 in. H .196 .392 H .638 1 .981 1 1.423 1M 1.963 13^ 3.337 2 5.105 2y 2 7.265 3 9.817 sy 2 12.762 4 19.831 5 H .442 .638 H .884 1.227 IH 1.669 1^ 2.209 l l A 3.583 2 5.351 2y 2 7.511 3 10.063 sy 2 13.008 4 20.077 5 1 .785 .981 1 1.227 1M 1.570 m 2.012 13^ 2.552 13^ 3.926 2 5.694 2y 2 7.854 3 10.406 33^ 13.351 4 20.420 5 \H 1.227 1.423 IH 1.669 IH 2.012 2.454 2 2.994 2 4.368 2H 6.136 3 8.296 3 10.848 sy 2 13.793 4 20.862 5 IX 1.767 1.693 \H 2.209 IH 2.552 2 2.994 2 3.534 2 4.908 2A 6.676 3 8.836 3M 11.388 4 14.333 4 21.402 5 2 3.141 4.909 3.337 2 5.105 2y 2 3.583 2 3.926 2 4.368 2H 4.908 2H 6.282 3 8.050 3 10.210 sy 2 12.762 4 15.707 43^ 22.776 5 2 l A 5.351 2H 5.694 23^ 6.136 3 6.676 3 8.050 3 9.818 sy 2 11.978 4 14.530 4 17.475 4M 24.544 6 3 7.069 5.265 3 5.511 3 5.854 3 8.296 3 6.836 sy 2 10.210 3^ 11.978 4 14.138 4 16.690 4M 19.635 5 26.704 6 W 2 9.621 9.817 sy 2 10.063 sy 2 10.406 3H 10.848 sy 2 11.388 4 12.762 4 14.530 43^ 16.690 w 2 19.242 5 22.187 5 29.256 6 4 12.566 12.762 4 13.008 13.351 4 13.793 4 14.333 43^ 15.707 4H 17.475 4^ 19.635 5 22.187 5 25.132 6 5 19.635 09.831 5 20.077 5 20.420 5 20.862 5 21.402 5 22.776 5 24.544 6 26.704 6 29.256 6 You will note that the first vertical column gives the standard sizes of conduit together with the cross-sectional area. The top horizontal column gives the sizes of conduit only. The small figures in the body of the table give the combined area of the two conduits and the size of conduit required for the reception of the required number and sizes of wires. For example: It is desired to know what size conduit will be required for three 0000 and three No. 1 . Starting in the vertical line with 1 3^-in. conduit , proceed horizontally to the vertical column for 2y 2 -\n. conduit and you will note that the com- bined area of the two conduits is 6.676, and the size conduit required is 3 in. If it is desired to find the size of conduit for three circuits, take the pipe size thus obtained and repeat the operation for the next size of conduit required. For pumping plant reliability demand General Electric equipment 39 GENERAL INFORMATION ON CENTRIFUGAL PUMPS The purpose of this section is to present in brief form some tables and data which may be of assistance to those interested in the planning and installation of irrigation pumping plants. The centrifugal pump is in most general use due to its adaptability for various classes of service. Its design is generally well understood and the various pump manufacturing companies issue catalogs which cover the field in a thorough manner — and which they will gladly supply on request. The usual pumping plant is either belt driven or direct connected. The latter drive can usually be employed and is more satisfactory and economical due to the elimination of belt loss, belt renewal and the saving in space. It is important that the pump be located as near the water line as possible to eliminate excessive suction head. The suction lift should not exceed 20 feet. If this distance can be lessened, so much the better. For that reason the pumping unit is usually mounted in a pit sunk to a point near the pumping water level. Although not absolutely essential, it is advisable that the pit be concreted throughout and that the floor be of sufficient thickness to provide a proper foundation. The pit should be large enough to permit of easy accessibility of pump and motor. The casing of the well extends through the concrete floor and can be water sealed around pump suction pipe if necessary. General Electric motors (Fig. 45) are particularly suitable for pumping plant service. A wide range of standard speeds permits of direct connection of motor to pump to fit almost any condition. They are made in single-phase, two-phase, three-phase 110 volts, 220 volts, 440 volts and 2200 volts. Impregnated moisture-resisting windings in General Electric motors make them particularly reliable in pumping plants where during a season of the year the plant is idle and it is impossible to prevent the accumulation of a certain amount of moisture on the windings. In selecting or ordering a centrifugal pump it is important that the following information be known: 1. Desired capacity of pump in gallons per minute. 2. Total suction lift in feet, that is, distance from center line of pump to operating water level. For pumping plant reliability demand General Electric equipment 40 Type KT, Form B Skeleton Frame Polyphase Typs RI, Form C, Single Phase Type I, Form K Skeleton Frame Polyphase Fig. 45. Types of Induction Motors For pumping plant reliability demand General Electric equipment 41 3. Total discharge lift in feet. 4. Length of suction and discharge pipe required, together with number of elbows required in line. 5. Voltage, phase and cycles of alternating current motor to be used. 6. If water is to be supplied from bored well, give diameter of well casing. If pit is already constructed, state its breadth, length and depth. 7. A rough sketch showing these dimensions and the proposed layout will greatly assist pump manufacturers in readily supplying the proper pump to fit the conditions. It is advisable that wells be tested before equipment is ordered. HYDRAULIC DATA FORMULA FOR FIGURING HORSE POWER REQUIRED BY CENTRIFUGAL PUMPS _ G.P.M.XHX8.33. ' 33,000 XE H.P. = horse power of motor required by pump. G.P.M. = capacity of pump in gallons per minute. H = total pumping head in feet. 8.33 is weight of one gallon of water in pounds. E = pump efficiency. For pumping plant reliability demand General Electric equipment 42 tYe// Operating Water Levet- ^—Suction Pipe r oot Va/ve used on = ■ smatt pumps r Pit Pump !§*# Motor Fig. 46. Necessary Pumping Plant Dimensions 43 TABLE IX APPROXIMATE CAPACITIES AND EFFICIENCIES OF CENTRIFUGAL PUMPS FOR VARIOUS HEADS Gal. per Min. PER CENT EFFICIENCY HEAD RANGE Size in In. 15 to 25 Ft. 30 to 60 Ft. 70 to 80 Ft. 1 20 35 28 1H 50 33 40 2 100 40 48 40 2 1 /* 150 40 50 40 3 225 48 56 52 4 400 50 60 55 5 700 55 64 60 6 900 56 67 62 7 1200 60 68 65 8 1600 60 68 65 10 3000 65 70 68 12 4500 65 70 68 These figures will vary somewhat depending on the type and manufacture of the pump, but may be used as a guide. Data can be supplied by pump manufacturers on any specific proposition or on sizes larger than shown in table. TABLE X CONVERSION TABLE To convert inches vacuum to feet head multiply vacuum gauge reading by 1.13. To convert pressure in pounds per square inch to feet head multiply pressure gauge reading by 2.31. To convert feet head to pounds pressure per square inch multiply by 0.433. 231 cubic inches of water = 1 gallon. 1 gallon of water weighs 8.33 lb. 1 cubic foot of water contains 7^ gallons. 1 second-foot =450 gallons per minute. 1 California miner's inch = 11.22 gallons per minute. For pumping plant reliability demand General Electric equipment 44 TABLE XI RECOMMENDED SIZES OF PIPE FOR VARIOUS LENGTHS OF DISCHARGE LINE LENGTH OF PIPE LINE IN FEET Gals. per Min. 50 100 250 500 750 1000 2000 3000 4000 5000 Recommended Pipe Sizes in Inches 25 1H IH 2 2 2V 2 2V 2 2V 2 3 3 3 50 2 2 2V 2 W 2 3 3 3 4 4 5 75 2 2V 2 2V 2 3 3 4 4 4 5 5 100 2V 2 2V 2 2V 2 3 4 4 5 5 5 5 150 3 3 3 4 4 5 5 5 6 6 200 3 4 4 5 5 5 5 6 6 6 250 4 4 4 5 5 5 6 6 6 7 300 4 4 5 5 5 6 6 7 7 8 400 4 5 5 6 6 6 7 7 8 8 500 5 5 6 6 7 7 8 8 10 10 700 6 6 6 7 7 8 8 10 10 10 800 6 6 7 7 8 8 10 12 12 12 1000 7 7 8 8 10 10 12 12 14 14 1200 8 8 8 10 10 10 12 12 14 14 1500 8 8 10 10 12 12 14 14 15 16 2000 10 10 10 12 12 14 14 15 16 18 3000 10 12 12 14 15 15 18 18 20 20 TABLE XII HOW TO DETERMINE TOTAL HEAD OF A PUMPING PLANT IN OPERATION Pressure A Gauge-+{F\ ^-Discharge Prpe Pump Vacuum Gauge Multiply reading on /I by 2.51 , "B" » 1.13 rfdd these results, then add d/stance "C'in Feet. This will then be the total head in Feet against which the Pump is operating. Fig. 47 This will then be the total head in feet against which the pump is operating. There will be a slight error in this procedure due to neglect- ing entrance and velocity head losses, but as these losses are slight on the average size of plant, they may be neglected. For pumping plant reliability demand General Electric equipment 45 FRICTION OF WATER IN PIPES When water flows through a pipe certain contact friction is set up with a resulting additional head, which is measured in feet or fractions thereof. The friction indicated in this table is in feet head \A B B B B A. A% 4 /W A 4 ■1 o' ■M ~- t i ■•« y M III' ' ^%ismr Fig. 48. Open Ditch per 100 feet of pipe, and is based on clean, smooth pipe interior. For slightly rough pipes add 25 per cent and for very rough pipes add 50 per cent to indicated friction heads. It is only when water is to be pumped through pipe line instead of being discharged into ditch at pumping plant that consideration of this table is necessary. J B m Fig. 49. Open Flume FORMULA FOR CALCULATION OF APPROXIMATE'QUANTITY OF WATER FLOWING IN OPEN DITCH ORJFLUME The correct method of measuring water flow is by means of a standard weir. However, it is not always convenient to construct a weir on the job and for that reason the following method is offered for calculation of approximate quantity of water flowing in open ditch or flume. For pumping plant reliability demand General Electric equipment 46 CM rHrH(MC^CMCO-*LOCO00 qqqqqqqqqq rH OOCCMCOCD^'* i-HCO^-*qi>.q(Moqq 'rinoi fij O 'rHrHCMCO^TflOt^OCOLOOt^rHCOCO OOOOOOOOHr-HMN^NOHtOMCCOO^CO ' rH rH r-i rH (M CM ^ d C5 rH CM CO TH LO CD Oi rH CO i-h LO CM TfH 05 CO oqqqoqqrHrHCMCMco^qcMt> : qiN.rHqoo»ooo 'rHrHrHCMCO^^t^d .5 00 HHHCXIMWM^CONOHiOHOONeOCOO qqqqqqqqqqrHrHrHc^c^q^qoo-rj<(MrHt>.qoqqqcooq ' ^ cm co co lo lo d oo co d rHrHCMCMCO^LCt^a>rHCOrH00OiCOCT>LO oqoqooooorHrHCMcMcoLOcoooococOrHTjHq'^'^q^qq rHrHCM^dddrHCo'dLod HHHHCqtO to rHrH(M(M(NCOLOCDt^t^CT!rHCC!COOa5IOOLO oqqqqqqqqqqrHrHc^coq^qc»rHLOoococorHqqocoqqooqt> 'rHrHrHINCOLO'dcNicodtNOOLOLOrH rH rH rH CM CM CO LO GO lo rH(MCO^lOJ^Oir-iCDt^OOrHl>a^t^OOeO o o o o o o q rH rH rH r* cm o r>- 05 cm lo rH ex i> co io ■* io q q q LO t>. q rHrHCN(Nco^>6o6co'dcoi>ddco'o6oooo rH^ to rH rH rH CM CO CO Ci O LO t^ CM 1^. CM rH rH rH rH (M (N ** CO CO rHLot^c5-*o»ocNa>ioi>©co OOOOr-NNWmOOOfflffirHiqrHHN^NiOiOnMCS^O'C *rHrHCNCOrflOd00rHdrHdco'ddT)H-rjJ(MrHr^d-rJH rHrH(M(MCO^t>COOOrHOCOCOCO r_t _( (m ro co -tf io CO ^Hioaicocoooico-^o ooo^c^coco>c^)oocxi-^^o>oo;CDiocDiC'*r>.t--o>o^»coq ' 1-4 r-I ,-H CM CM CM Tj5 d 00 r-i Tji ^ LO t)! tJ< t^ O CO OS CO CM IM' l> rHrHrHCMCO^LOi>OlOOOrH^CO rH rH -rj .9 5 1^ 'rHCN^cDoo^'^coco^cdrH^cooio'r^'*c35'od rHrHrHCMCO-tflOlOl^OOLOOCilOLOO rH CM CNJCO^CO 3 ^•^ic"5t>qqq»ocooq ' rH lO d ^' rH 00 1^ CO t^." OJ CD OJ t^ TfJ 00 1^ CD rHCNCMCO-*lO00rHCN-*00C'V00 i-H rH i-H (M CO CO TjH LO qqqoo d ^ (M rH Tji I^CDt^COOl rH " 3C ■IC ic 3C 10 :< K us :c : : 31 - a : s -. c >Lf i0 C e >- c tr. C c c '- C c '- 2 c c 2 § o § >- c •2 g c c 2 c c- S CN C c s? For pumping plant reliability demand General Electric equipment 47 Open Ditch Measure widths A-A', etc. Measure depths B-B', etc. Let A = average width in feet. Let B = average depth in feet. Measure velocity of water by timing a float in the ditch. This velocity should be reduced to feet per second. Deduct 15 per cent of this for friction. Then gallons per minute = A XB X V X450. (See Fig. 48.) Flume Same procedure as above, except deduct 10 per cent from indicated velocity for friction. (See Fig. 49.) TABLE XIV DATA ON LEATHER BELT TRANSMISSION H.F> 2 3 /Ply 7 a 9 K) Belt Width in Inches I— 2Ply 20 30 4CT -J- 3Pig it Fig. 50 For pumping plant reliability demand General Electric equipment ' 48 DATA ON LEATHER BELT TRANSMISSION— (Cont'd) Belt Centers In order to avoid trouble which may arise on account of belted motors being located so close to driven pulleys that belts do not make sufficient contact with the motor pulley, the following rule should be observed: Rule The distance between centers with straight open belting should preferably be more but never less than 23^2 times the diameter of the larger pulley. This will insure an arc of contact of at least 160 degrees. Belts are Manufactured to the Following Widths: Up to 2 in. varying by 3^ in.; 2 to 5 in., varying by l A in.; 5 to 10 in., varying by 1 in.; 10 to 36 in., varying by 2 in.; above 36 in., varyin by 4 in. Widths The accompanying curves showing the widths of leather belting which should be used for various belt speeds and horse power, have been plotted from the following data: Working tension per sq. in. =275 lb. for laced belting. Average thickness per ply=TT in. Centrifugal force = 0.012V 2 (with velocity in ft. per sec). T1=1;T2 =0.316. Tl Ratio tight over slack side = ^- = 3. 1643. Torque or pull = T 1 - T2 = 0.684. Greatest tension =T1+0.012V 2 . Speeds The following belt speeds are considered safe recommendations: Recommended H.P. Kw. Belt Speed in Feet per Min. 1 to under 5 1 to under 4 2000 5 to under 20 4 to under 15 2500 20 to under 75 15 to under 56 3000 75 to under 100 56 to under 75 3500 100 to under 150 75 to under 112 4000 150 to under 200 112 to under 159 4500 200 to under 1450 159 to under 1082 5000 Five thousand feet per minute is the maximum speed considered safe to operate belts. WIDTH OF BELT IN RELATION TO WIDTH OF PULLEY FACE WIDTH OF FACE MUST NOT BE LESS THAN WIDTH OF BELT BUT MAY EXCEED SAME BY Width of Belt in Inches Cast Iron Pulleys Paper Pulleys Max. in Inches Max. in Inches Up to 2 2 to 5 5 to 12 12 to 20 incl. Above 20 to 24 4 to 36 Above 36 X H H H % % H H l l 2 For pumping plant reliability demand General Electric equipment 49 PUMP AND MOTOR SPECIFICATION SHEETS (jg) PUMP AND PIPING (g) Size of pump Capacity in gallons per minute Total head Suction lift .'. Discharge lift Size and length of discharge pipe Size and length of suction pipe _ Does pump discharge at surface? If not, state size and length of pipe line.„ Elbows: number, size and length Priming equipment; hand or motor-driven Check valve Foot valve Miscellaneous fittings PIT Depth Length Width Concreted Timbered Earthen. Location of well in pit Diameter and gauge of well casing Type and dimensions of house over pit (jg) MOTOR Horse power Speed Volts.. Phase.. Cycles Type... How connected to pump Accessories: Pulley Base Starting device ....Ammeter For pumping plant reliability demand General Electric equipment 50 WIRING 220- OR 440-VOLT, SINGLE- OR THREE-PHASE PLANT Size of wires . 6?!) Red Core Size of Conduit fcfl) Greenfielduct Capacity of entrance switch.... wfj$ Capacity of entrance fuses QQ Note. — Consult power company regarding metering require- ments. Meter board Miscellaneous fittings WIRING 2200-VOLT, THREE-PHASE PLANT Size of entrance wires {M} braided varnished cambric 3000-volt cable. Meter board..... Switchboard panel: Capacity of (JM) FK-5, 2500- volt oil circuit breaker ....amperes, equipped with under-voltage release and 2 ampere \Mh PC- 146 overload relays. Drill for power cqmpany's watthour meter ...Watthour meter con- nections.. Disconnecting switches amperes, 6j^ Type LG-16, 2500-volt, back connected. Size of motor conduit.. ? -^w Greenfielduct Size of lead covered cable ra|) varnished cambric, 3-conductor, 3000-volt lead covered. Mechanically fastened end bells Motor connections Miscellaneous material and fittings For pumping plant reliability demand General Electric equipment 51 PRIMING EQUIPMENT ^ MOTOR Horse power Speed Volts Phase cycles Type How connected to priming pump Accessories - Starting device ampere (g) FP-10 oil circuit breaker. Capacity of switch mounted on subbase of switch- board amperes (M) Type LD-22. Capacity of fuses Size of wires (g|) Red Core Size of Conduit (%& Greenfielduct PRIMING MOTOR TRANSFORMERS (g) TYPE H Number Capacity. Voltage primary Voltage secondary LIGHTING No. of outlets Location Size of (gfc} Edison MAZDA lamps.... ...watts Reflectors ($h Ivanhoe Main lighting switch: Capacity amp. Location : __ Control switch: (g|) snap ....Location Transformer capacity ....Kv-a. High tension voltage Low tension voltage ((|&) Type H transformers where required.) For pumping plant reliability demand General Electric equipment 52 GENERAL ELECTRIC COMPANY PRINCIPAL OFFICES: SCHENECTADY, N. Y. SALES OFFICES (Address nearest Office) Atlanta Ga - Third National Bank Building Baltimore, Md.. '.'.'. Lexington Street Building Birmingham, Ala Brown-Marx Building Boston. Mass • -84 State Street Buffalo, N. Y • Electric Building Butte. Mont.. . . . . • • • : • .Electric Building Charleston, W. Va . . . . Charleston National 3ank Building Charlotte, N. C Commercial National Bank Building Chattanooga! Tenn • • • • James Building Chicago 111 Monadnock Building Cincinnati. Ohio.' .'...... - . Provident Bank Building Cleveland, Ohio Illuminating Building Columbus, Ohio The Hartman Building Dayton, Ohio Dayton Savings & Trust Building Denver' Colo • • • .First National Bank Building Des Moines, Io'waV .".".' ■ Hippee Building Detroit, Mich Dime Savings Bank BmMing Duluth, Minn Fidelity Bu Elmira, N. Y Erie Pa. ■ • • Commerce Building Fort Way ne.'ind." .'.'.' .'.'.'.'." .1600 Broa Grand Rapids. Mich .Commercial Savings Ban', Hartford. Conn Hartford National Indianapolis. Ind Traction Te Jacksonville, Fla. Heard National Ban* Bu Toplin. Mo Miners Bank Bu Kansas City, Mo.. . . , Knoxville, Tenn Little Rock, Ark , Los Angeles, Calif ... Corporation Building, 724 S. S; Louisville, Ky Memphis, Tenn E Milwaukee, Wis Public Service Bui Minneapolis, Minn . 410 Third A Nashville, Tenn • • • Stahlman Budding New Haven, Conn Second National Bank Building New Orleans, La Maison Blanche Building New York N. Y Equitable Building, 120 Broa Niagara Falls. N. Y • Gluck Building Omaha, Neb Electric Building Philadelphia, Pa.. .Witherspoon Building Pittsburgh, Pa Oliver Building Portland, Ore Electric Building Providence, R. I .Turks Head Building Richmond, Va Virginia Railway & Power Building Rochester, N. Y Granite Building St. Louis, Mo Pierce Building Salt Lake City, Utah. , Newhouse Building San Francisco, Calif. . . ....... Rialto Building Seattle, Wash.. Colman Bui: Spokane, Wash Paulsen Building Springfield, Mass . Third National Bank Building Syracuse, N. Y Onondaga County Savings Bank Building Toledo, Ohio • Spitzer Building Washington, D. C Commercial National Bank Building Worcester, Mass State Mutual Building Youngstown, Ohio Stambaugh Building For Texas, Oklahoma and Arizona Business refer to Southwest General Electric Co. Dallas, Tex Interurban Building El Paso, Tex 500 San Francisco Street Houston, Tex .... Third and Washington Streets Oklahoma City, Okla 1 West Grande Ave. For Hawaiian Business refer to Catton, Neill & Co., Ltd., Honolulu Motor and Lamp Agencies in all large cities and towns INTERNATIONAL GENERAL ELECTRIC CO 120 Broadway, New York City, and Schenectady, N. Y. Representatives and Agents in m.l Count- . RETURN TO the circulation desk of any University of California Library or to the NORTHERN REGIONAL LIBRARY FACILITY Bldg. 400, Richmond Field Station University of California Richmond, CA 94804-4698 ALL BOOKS MAY BE RECALLED AFTER 7 DAYS 2- month loans may be renewed by calling (510)642-6753 1-year loans may be recharged by bringing books to NRLF Renewals and recharges may be made 4 days prior to due date DUE AS STAMPED BELOW SEP 01 1995 20,000 (4/94)