Installation (cont’d)
DANGER 
HAZARDOUS VOLTAGE
(Can Cause Severe Injury or Death)
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.
Power Connections
GE Zenith transfer switches are supplied with UL listed solderless screw type terminals as standard for the Normal, Emergency and Load power connections.
Table 1 lists the number and sizes of cable lugs supplied as standard for each switch amp rating.
Connect the Normal, Emergency, and Load conductors to the clearly marked terminals on the transfer switch. Remove surface oxides from cables by cleaning with a wire brush. Verify that all connections are correct before tightening the lugs. All cable lug connections must be tightened to the proper torque values as shown in Table 2.
NOTE: Do not run cables or wiring behind
Screw Type Terminals for External Power Connections
Switch Size | Utility, Generator and Load Terminals | Fully Rated Neutral Bar (When Required) | |||
(Amps) |
|
|
|
| |
Cable Per Pole | Range of Wire Sizes | No. of Cables | Range of Wire Sizes | ||
| |||||
40 | 1 | #8 to 3/0 AWG | 3 | #8 to 1/0 AWG | |
80 | 1 | #8 to 3/0 AWG | 3 | #8 to 1/0 AWG | |
100 | 1 | #8 to 3/0 AWG | 3 | #8 to 1/0 AWG | |
150 | 1 | #8 to 3/0 AWG | 3 | #8 AWG to 300 MCM | |
200, 225, 250* | 1 | #6 AWG to 250 MCM | 3 | #6 AWG to 300 MCM | |
300, 400 | 1 | #4 AWG to 600 MCM | 3 | #4 AWG to 300 MCM | |
Table 1
* IEC Rating Only
SWITCH POSITION INDICATOR
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| LOAD |
|
|
|
| TERMINALS |
| ||
UTILITY | T1 | T2 | T3 |
| |
TERMINALS |
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|
|
| |
|
|
|
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| OPTIONAL A4 CONTACT |
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|
|
|
| |
|
| N1 | N2 | N3 | OPERATES WHEN IN |
BR |
|
|
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| UTILITY POSITION |
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|
|
|
| |
|
|
|
|
| JP |
|
|
|
|
| Exerciser |
|
|
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| CONTROLLER |
N |
|
|
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| ENGINE |
|
|
|
| START | |
|
| E1 | E2 | E3 |
|
|
|
|
|
| OPTIONAL A3 CONTACT |
|
|
|
|
| |
|
|
|
|
| OPERATES WHEN IN |
|
| GENERATOR | GENERATOR POSITION | ||
|
|
| |||
|
| TERMINALS |
| ||
T = Load | N = Utility | E = Generator |
| ||
Tip!
Install
load
cables
first.
OPTIONAL ENGINE CONTROLS OR AIR CONDITION DISCONNECT OR 3 PHASE BOARD
3 AND 4 POLE ONLY
Figure 2 - Power Panel
■ GE Zenith Controls | ZTX Operation and Maintenance Manual | 3 ■ |