Allen-Bradley 1512B, User Manual

Page: 46 / 108

46 Rockwell Automation Publication 1500-UM055I-EN-P - December 2021
Chapter 3 Common Installation
Incoming Line Cable
Connections
Incoming cables are connected to the power bus in the last section on the left.
1. Remove the center-back plate or side plate to access the power bus. If
access to the rear of the unit is not possible, refer to Front Access– Access
to Power Bus on page 18 of Chapter 1 for either standard or ArcShield
enclosures.
2. Connect the incoming power lines to the power bus. Torque to
specifications (see Recommended Torque Values on page 11 ) (see
Figure 42 ).
Figure 42 - Incoming Line Cable Connections
3. Connect the ground wire to the ground bus lug.
4. Connect any external control wires to the control panel terminal blocks
in the low voltage compartment. Refer to wiring diagram.
ATTENTION: To avoid shock hazards, lock out incoming power (see
Power Lock-out Procedure on page 53 ) before working on the
equipment. Verify with a hot stick or appropriate voltage measuring
device that all circuits are voltage free. Failure to do so may result in
severe burns, injury or death.
IMPORTANT
For Non-ArcShield units , cable size should not exceed 1-750 MCM
or 2-500 MCM per phase.
For ArcShield units , cable size should not exceed 1-500 MCM or 2-
4/0 per phase. For larger cables, an incoming line module must be
used.
Stress cones should be internal non-skirted style only. The use of
external style (skirted style) is not recommended due to space
considerations.
Power
Cable
Lugs
Ground
Bus
Lug
IMPORTANT
If line cables require installation by front access, complete the
incoming line connection before installing load cables.