■■GE Zenith Controls 3■■
ZTX Operation and Maintenance Manual (62R-2000)
GENERATOR
TERMINALS
N
BR
UTILITY
TERMINALS
LOAD
TERMINALS
T1 T2 T3
N1 N3
E1 E3
E2
N2
T = Load N = Utility E = Generator
CONTROLLER
ENGINE
START
OPTIONAL A4 CONTACT
OPERATES WHEN IN
UTILITY POSITION
OPTIONAL A3 CONTACT
OPERATES WHEN IN
GENERATOR POSITION
JP
Exerciser
OPTIONAL ENGINE CONTROLS 
OR AIR CONDITION DISCONNECT
OR 3 PHASE BOARD
3 AND 4 POLE ONLY
SWITCH
POSITION
INDICATOR
Install
load
cables
first.
Tip!
Table 1
Screw Type Terminals for External Power Connections
Switch Size
(Amps)
40
80
100
150
Utility, Generator and Load Terminals
1#8 to 3/0 AWG
Cable Per Pole Range of Wire Sizes
1#8 to 3/0 AWG
1#8 to 3/0 AWG
1#8 to 3/0 AWG
Fully Rated Neutral Bar (When Required)
3#8 to 1/0 AWG
No. of Cables Range of Wire Sizes
3#8 to 1/0 AWG
3#8 to 1/0 AWG
3#8 AWG to 300 MCM
200, 225, 250*
300, 400
1#6 AWGto 250 MCM
1#4 AWG to 600 MCM
3#6 AWGto 300 MCM
3#4 AWG to 300 MCM
*IEC Rating Only
Installation
(cont’d)
Figure 2 - Power Panel
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 1lists the number and sizes of cable lugs supplied
as standard for each switch amp rating.
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.
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
front-connected transfer switches.