TCI HGA Manual - Manual (Page 31)

31
Table 4.1b – Power Terminal Wire Size (without breaker) Capacity Range and Tightening Torque
Caution Use copper wire that is appropriate for the voltage and current rating of the equipment. The wire
selection must conform to the requirements of the National Electrical Code and/or other applicable
electrical codes.
Use wire with an insulation temperature rating of 75°C or higher.
Connection Diagram
Figure 4.3 shows the typical wiring connections between the models of the HGA and the load. Refer
to the drawings furnished with the unit for more specific information.
• The input 3-phase AC voltage source must be connected in a positive ABC phase rotation
from L1-L2-L3 for correct unit operation.
Figure 4.3 – Typical Load Connection Diagram
Notes:
1.) Wiring should be 75°C or higher insulated copper, with the appropriate voltage and current rating.
2.) Chassis ground must be connected to the ground of the premises wiring system, in accordance
with NEC and local codes. Connection must be made using a wire conductor.
3.) Terminal TB-I & J25 wire range is 30-12 AWG, tightening torque is 4.4 IN-LB (0.5 NM).
4.) Operating current transformers with the secondary winding open can result in a high voltage
across the secondary terminals which may be dangerous to personnel or equipment.
Chassis Size
Ground Lug Power Terminals
Wire Size Torque In-lbs (Nm) Breaker IC Wire Size Torque In-lbs (Nm)
39 to 100 Amp 14 AWG – 2/0 120 (13.6) 25 to 100 kA 14 – 2/0 AWG 180 (20.3)
150 to 200 Amp 14 AWG – 2/0 120 (13.6)
25 to 100 kA
6 AWG – 350 MCM 274 (31)
150 to 200 Amp 14 AWG – 2/0 120 (13.6)
None
6 AWG – 350 MCM 274 (31)
Control Terminals Wire Size 28 to 14 AWG Torque 4.4 in-lb (0.5 Nm)
!