Allen-Bradley CENTERLINE 2100, Руководство по установке, Страница: 81 / 136

Rockwell Automation Publication 2100-IN012G-EN-P - August 2016 81
Final Checklist Before Energizing Chapter 7
Recommended torque values can be found on the information label on
the interior of the vertical wireway door or on the interior right-hand
side plate of frame mounted units. See Joining and Splicing Vertical
Sections, publication
2100-IN010 , for splicing information.
The factory-made power bus connections are tightened by a computer-
controlled torquing system. The following connections do not require
re-torquing:
• Vertical to horizontal bus connections.
• Power conductor to horizontal bus connections.
These factory-made horizontal to vertical bus connections do not
require servicing for the life of the MCC.
6. Check and verify that all ground connections are made properly, based
on local standards.
If ground bus is not provided or has been removed, check that the MCC
sections are connected to provide a continuous ground path. Verify that
100 ms units are connected to the vertical equipment load ground bus.
7. Check the field wiring.
a. Check the field wiring for proper conductor sizing.
Use the National Electrical Code (NEC) 75 °C (167 °F) wire tables
to size the MCC field conductors.
b. Check that all barriers and parts that have been removed during
installation have been reinstalled.
Some barriers can be required to be removed for field wiring.
c. Check that all incoming and outgoing power wiring is secure and
braced to withstand the effects of a fault current as detailed in
Chapter 3 .
d. Check that conduit and cabling are well supported.
For incoming line compartments, 2.0 space factors, 26 in. (660.4
mm) or less, firmly secure the incoming cables halfway between the
top of the section and the incoming line compartment terminals. In a
full section (6.0 space factor) incoming line compartments, brace the
cables every 12 in. (305 mm); if the system’s available short circuit
current is above 42,000 A but less than 65,000 A rms symmetrical.
Above 65,000 A rms symmetrical available current bracing occurs
every 6.5 in. (165 mm). This bracing is in accordance with the
Underwriters Laboratories (UL) listing and is necessary to withstand
forces resulting from high fault currents. For information on cable
bracing methods, see
Chapter 3 of this publication.
e. Check the integrity of all field connections.
Recommended torque values not found on individual devices can be
found on the unit wiring diagrams.
TIP We recommend that a barrier checklist is developed including such items as,
unit location, and barrier location. Save this checklist for future reference.