GE Industrial Solutions Evolution Series E9000 - Manual (Page 12)

11
Evolution Series E9000 Installation & Maintenance Guide
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 specifically 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 specified, an optional ground lug is provided
in each draw-out combination starter unit for termi-
nating 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.
Wiring NEMA Type B Motor Control Centers
Use the following procedure to wire NEMA Type B 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 feeder cables directly on the
lugs on the disconnect. Connect the motor leads at
the starter terminals if either of these conditions is met:
a. The motor control center is furnished as
“NEMA B-D wiring” (where D=Device) or
b. The starter is NEMA size 6 or smaller.
Connect the motor leads to the starter at the T1, T2,
and T3 terminals if these conditions are met:
a. The equipment is furnished as “NEMA B-T” wiring
and
b. The starter is NEMA size 2 or smaller.
Install plastic side barrier after power and control
wiring in Step 4 is complete.
Aluminum wire is not recommended for this product.
3. Pull the control wiring, then measure, cut, strip and
terminate it at the terminal blocks provided within
the unit. Optionally, control terminal blocks may be
pulled apart and the plastic knock-outs removed to
allow wiring outside the bucket. The terminal blocks
can then be placed back through the plastic knock-
out openings and reinstalled. This method allows
wiring to terminal blocks outside the confines of the
starter unit.
4. When specified, 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.
Wiring NEMA Type C Motor Control Centers
Master terminal boards in NEMA Type C motor control
centers are provided in the larger top or bottom hori-
zontal wireway of each vertical section. (Refer to the
drawings provided by GE for the locations of master
terminal boards.) Figure 19 and Figure 20 show typical
Type C terminal board arrangements.
These terminal boards are connected at the factory to
control terminal blocks of plug-in units in each vertical
section. Wiring diagrams provided by GE show these
terminal points. These terminal blocks are also factory
wired to the T1, T2 and T3 motor-lead terminals for each
NEMA size 1–2 starter unit in each vertical section.
When installing cables, be sure to not damage
the cable insulation on any sharp edges, such as
steel work or screws.