(b)  
Energize the power cable.

 (c)  
Make sure the EXTERNAL POWER CONN light on the P19 panel come on.

 (d)  
If the refuel panel door is closed, make sure the NOT IN USE light on the P19 panel come on.

 NOTE: The NOT IN USE light will not come on if the refuel
____
 panel door is open.

 (e)  Make sure that the GRD POWER AVAILABLE light on the P5 panel come on.
 S 862-022
 (3)  
Make sure that the BUS TRANS switch on the P5 panel is in the AUTO position.

 (4)  
Make sure the GRD PWR switch on the P5 panel is in the OFF position.

 S 862-023
 NOTE: When the GRD PWR switch is in the ON position, the GROUND
____
 SERVICE switch does not operate.

 S 862-024
 (5)  Move the GROUND SERVICE switch on the forward attendant's panel (P13) to the ON position.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 TASK 24-22-00-862-025
 5. Remove External Power from the Ground Service Buses Only (Fig. 201)
________________________________________________________
 A. Standard Tools and Equipment
 (1)  External power supply 115/200 volt ac, 3-phase, 400 Hz
 B. Access
 (1)  
Location Zone
 202 Lower Nose Compartment

 (2)  
Access Panel
 1101 External Power Receptacle Door

 C. Procedure
 S 862-026
 (1)  Move the GROUND SERVICE switch on the forward attendant's panel (P13) to the OFF position.
 S 092-068
 WARNING:  REMOVE ELECTRICAL POWER FROM THE POWER CABLE BEFORE YOU REMOVE
_______ THE POWER CABLE FROM THE EXTERNAL POWER RECEPTACLE. ELECTRICAL ARCS CAN CAUSE INJURIES.
 (2)  
Remove power from the external power cable.

 S 092-028

 (3)
Remove the power cable from the external power receptacle.

 (a)  
Make sure that the EXTERNAL POWER CONN and NOT IN USE lights on the P19 panel go off.

 (b)  
Make sure that the GRD POWER AVAILABLE light on the P5 panel go off.

 S 412-029
 (4)  Close the door for the external power receptacle.
 TASK 24-22-00-862-002
 6. Supply APU Generator Power to the Buses (Fig. 201)
_______________________________________
 A. General
 (1)  You can use APU power for these (if the airplane is on the ground):
 (a)  
115-volt ac generator bus 1

 (b)  
115-volt ac generator bus 2

 B. Standard Tools and Equipment
 (1)  External power supply 115/200 volt ac, 3-phase, 400 Hz
 C. References
 (1)  49-11-00/201, APU Power Plant
 D. Access
 (1)  
Location Zone
 202 Lower Nose Compartment

 (2)  
Access Panel
 1101 External Power Receptacle Door

 E. Procedure
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 862-069
 WARNING:_______ MAKE SURE THAT THE ELECTRICAL SYSTEM IS CLEAR OF OTHER PERSONS
 BEFORE YOU SUPPLY POWER TO THE AIRPLANE.  HIGH VOLTAGES CAN
 CAUSE INJURIES.

 CAUTION: KEEP TO A LIMIT THE CONTINUOUS CURRENT DRAIN FROM THE GENERATOR
_______ TO 150 AMPS. TOO MUCH CURRENT CAN CAUSE DAMAGE TO THE GENERATOR.
 (1)  
Turn the BAT switch on the electrical systems control panel, P5, to ON.

 S 862-036

 (2)  
Make sure that the BUS TRANS switch on the P5-4 panel is in the AUTO position.

 S 862-037