Individual Unit Wiring; Wiring Nema Type A Motor Control Centers - GE Evolution Series E9000 User Manual

Evolution Series E9000 User Manual
based on horizontal bus bracing. However, cables
should always be secured at the rst support inside the
enclosure and at the support nearest to the incoming
terminals. Insulated bushings are also recommended at
conduit terminations.
Figure 17. Typical top entry of main cables to the
incoming-line lug compartment (600A shown)
Figure 18. Typical bottom entry or main cables to the
incoming-line lug compartment (600A shown)
Align the conduit linearly directly over or as close as
possible to the supports. Run the cable in a convenient
orientation, making sure the cable is located against
the supports before it connects to the cable terminals.
Lash the cable using the following procedure:
Wrap the line cables together and, if provided, tie
cables together with nominal 3/8-inch (9.5 mm) nylon
rope or rope having a minimum tensile strength of 2000
pounds (8896 N), at 6 inches (152 mm) and 12 inches
(305 mm) from the line terminals. Use ve wraps and
complete every additional 6 inches with ve wraps or
every 1 inch (25 mm) with one wrap. Use supplied cable
supports as desired. Refer to UL 891.

Individual Unit Wiring

Open the vertical wireway door(s) and the top and/or
bottom horizontal wireway hinged covers. All doors
can be removed, if desired, by extracting hinge pins or
removing the hinge.
When installing cables, be sure to not damage
the cable insulation on any sharp edges, such as
steel work or screws.
Where access to the rear of the section is available,
cables can be brought into the space behind the vertical
bus and brought forward into the front wire trough area
through any of the modular openings in the right-hand
steel support plate.

Wiring NEMA Type A Motor Control Centers

Use the following procedure to wire NEMA Type A MCCs:
1. Remove black plastic barrier closest to unit connection
points and remove knockouts as required.
2. Pull load cables near the unit to be wired. Measure
(allowing for cable bends), cut and strip the cables,
and feed them carefully through barrier knockout
into the unit. Terminate the cables on the feeder or
starter lugs provided in the unit. If aluminum wire is
used, coat the wire strands with an oxide-inhibiting
grease speci cally designated for use with aluminum
cable. Install plastic side barrier.
3. Pull the control wiring, then measure, cut, strip,
and terminate it on individual device terminals in
the unit.
4. When speci ed, an optional ground lug is provided in
each draw-out combination starter unit for terminating
a motor-frame grounding wire. (For larger starters,
the lug is mounted on the horizontal ground bus.)
5. Use cord or plastic ties to secure all wiring. Route the
wiring to avoid interference with moving parts and
to keep it away from heat-producing components,
such as resistors and fuses.
6. Verify that the connections on all devices and terminal
blocks are tightened to their proper torque values, as
listed on the label on the vertical wireway door.
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