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Rockwell Automation Publication 2100-IN012G-EN-P - August 2016
Chapter 3
Installing Conduit and Cable
Top Entry Conduit
If your conduit is entering from the top, follow this procedure.
1. After the MCC is in place, leveled, and the sections are joined and
spliced, bring conduit into the top of the incoming section.
For approximate top entry locations and wiring schemes for main fusible
disconnects, main circuit breakers and incoming line compartments,
refer to Mains and Incoming Lines Dimension Reference,
publication
.
2. Remove the lifting angle and top plate.
3. Modify the top plate for necessary conduit entries.
This method helps guard against metal chips falling into the MCC,
which can cause serious damage to the components.
4. Replace the top plate and lifting angle bolts to guard against dust or dirt
from entering the top horizontal wireway.
5. Make sure that all incoming conduit is clear of the horizontal ground
bus.
For approximate location of the horizontal ground bus mounted in the
top horizontal wireway, refer to Mains and Incoming Lines Dimension
Reference, publication
.
For space availability for incoming cables, refer to the elevation drawings
shipped with assembled MCCs.
Installing Cable
Install the cable when the temperature is above freezing 0 °C (32 °F), unless the
cable is suitable for installation at temperatures below freezing. This helps
prevent cable insulation from cracking or splitting.
MCCs are rated for use with 75 °C (167 °F) cable. Cable must be sized by using
a 75 °C (167 °F) column in NEC Table 310–16 (NEC 2005 Edition). The
temperature rating of the lugs is not relevant.
ATTENTION:
For ArcShield™ units with 100 ms arc duration rating, conduit,
cable, and wiring must be installed in such a way so that it does not interfere
with the opening of the top plate vent (no cable or conduit in the top-rear of
cabinet; cable trays must be a minimum of 12 in. (305 mm) above the top
plate).
ATTENTION:
Properly connect all line and load cables to avoid a bolted fault
and equipment damage.
Содержание CENTERLINE 2100
Страница 4: ...4 Rockwell Automation Publication 2100 IN012G EN P August 2016 Summary of Changes Notes ...
Страница 106: ...106 Rockwell Automation Publication 2100 IN012G EN P August 2016 Chapter 10 Maintenance after Fault Condition Notes ...
Страница 108: ...108 Rockwell Automation Publication 2100 IN012G EN P August 2016 Chapter 11 Renewal Parts Notes ...
Страница 134: ...134 Rockwell Automation Publication 2100 IN012G EN P August 2016 Index Notes ...
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