Rockwell Automation Allen-Bradley CENTERLINE 2500, Instruction Manual

Page: 40 / 88

Publication 2500-IN001A-EN-P - May 2006
4-4 Installing Cable
In Figure 4.3, a hardwood brace made for the specific application is used.
Holes are bored approximately the size of the cable diameter. Several bolt
holes are also bored the breadth of the hardwood brace. The brace is cut in
two pieces and is used as a clamp to secure the cables. Through bolts are
inserted into the brace and tightened so that cables are held tightly in place.
Figure 4.3 Securing Cables with Hardwood
A second form of hardwood brace (not shown) is a yolk type in which the
cables are passed through. Holes should be small enough to provide a snug fit
for the cables. The connectors or lugs are attached to the cables, and the cables
are bolted to the terminals.
When using the hardwood bracing method, use the following guidelines.
•
For short circuit current < 42,000 A, brace cables every 300 mm.
•
For short circuit current >/= 42,000 A, brace cables every 150 mm.