GE ZBTSD - Manual (Page 4)

2 GE Zenith Controls ■ ZBTS / ZBTSD Operation and Maintenance Manual (71R-4000A)
Installation
Table 2
Tightening Torque for Lugs
Socket Size
Across Flats
Torque
Lb. - In. Lb. - Ft.
45 1/8 4
100 5/32 8
120 3/16 10
150 7/32 12
200 1/4 17
275 5/16 23
375 3/8 31
500 1/2 42
600 9/16 50
Power Connections
GE Zenith transfer switches are supplied with UL listed
solderless screw type terminals as standard for the
Source 1, Source 2 and Load power connections.
Table 1 lists the number and sizes of cable lugs supplied
as standard for each switch amp rating.
Connect the Source 1, Source 2, 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.
Table 1
Power Connections: Screw Type Terminals for External Power Connections
Switch Size
(Amps)
40
80
100
150
200, 225, 2500
260, 300, 400
600
800, 1000, 1200
Source 1, Source 2 & Load Terminals
1 #8 AWG to 1/0
Cable Per Pole Range of Wire Sizes
1 #8 AWG to 1/0
1 #8 AWG to 1/0
1 #8 AWG to 3/0
1 #6 AWG to 250 MCM
1 #4 AWG to 600 MCM
2 #2 AWG to 600 MCM
4 #2 AWG to 600 MCM
Neutral Bar (When Required)
3 #8 AWG to 1/0
No. of Cables Range of Wire Sizes
3 #8 AWG to 1/0
3 #8 AWG to 1/0
3 #8 AWG to 300 MCM
3 #6 AWG to 300 MCM
3 #4 AWG to 300 MCM
8 #2 AWG to 600 MCM
12 #2 AWG to 600 MCM
1600, 2000
2600, 3000, 4000
Line, Load and Neutral terminals are located in the rear of switch
and arranged for bus bar locations
Engine Start
Control Connections
Engine-start control wires connect to control terminals
beside the Entelli-Switch 250. Engine start terminals are
indicated by a schematic symbol (the symbol indicates
the contact state for a de-energized normal source).
Figure 2 shows the engine-start contacts.
Make all other necessary control connections to the
control panel terminal blocks per the schematics
supplied with the ATS.
NOTE : All control wires (18-12 AWG) must be
torqued to 19 in/lbs.
D CABINET
LIFTING EYES
SPREADER BAR
H
45°
Figure 1
NOTE : When lifting the switch using a spreader bar,
height H must be equal to half of distance 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.