Publication 2100-IN012B-EN-P - April 2005
4-2 Installing Conduit and Cable
3. To guard against dust or dirt from entering the top horizontal wireway,
replace the top plate and lifting angle bolts.
4. Make sure that all incoming conduit is clear of the horizontal ground
bus.
5. For approximate location of the horizontal ground bus mounted in the
top horizontal wireway, refer to publication 2100–4.2, Mains and Incoming
Lines Dimension Reference.
6. For space availability for incoming cables, refer to the elevation drawings
shipped with assembled MCCs.
Installing Cable
Install cable when the temperature is above freezing (32°F or 0°C); unless
cable is suitable for installation at temperatures below freezing. This will help
prevent cable insulation from cracking or splitting.
Motor control centers are rated for use with 167°F (75°C) cable. Cable must
be sized using 167°F (75°C) column in NEC Table 310–16 (NEC 2005
Edition). The temperature rating of the lugs is not relevant.
Lugs
Verify the compatibility of wire size, type and stranding versus the power lugs
furnished. Use correct lugs in all applications. Crimp compression lugs with
manufacturer recommended tools.
NOTE: Use the motor control center electrical schematics to verify field
wiring connection points.
Incoming Line Compartment
Top or bottom entry to the incoming line section bus is straight through to the
connection terminals. The vertical bus provides pads for the incoming lugs.
The lug selection should be based on the size, number and type of conductor.
ATTENTION
Properly connect all line and load cables to avoid a bolted
fault and equipment damage.
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