12
Unison Enclosure Install
Rough-in Line Conduit to the Auxiliary Enclosure
Line input wires in main lug, main breaker, or cross-bussed DRd enclosure applications terminate first
in the Auxiliary enclosure and then are fed through the side conduit knockouts to the adjoining DRd
enclosure(s).
The line feed-through (interconnect) cables for phase, neutral and ground lugs in the auxiliary
enclosure are connected for you at the factory. Your enclosure is supplied with one or two sets of
interconnect cables depending on the model ordered.
1:
Plan wire entry in to the enclosure. See
Wire Routing and Specification
2:
Remove the side conduit knockout from adjoining side of the auxiliary enclosure and the DRd
enclosure. When installing in a cross-bussed application, remove both side knockouts.
3:
Install the ETC supplied nylon insulated chase nipple to the knockouts between the auxiliary and
DRd enclosure(s).
4:
Remove the auxiliary enclosure front cover, and if necessary, the top or bottom front trim covers
for complete access to the lugs.
5:
Punch conduit holes, top or bottom, as required by the wire entry plan.
6:
Install conduit fittings or insert fish paper lining material into the opening.
7:
Be sure there are minimal air gaps. See
.
Main Lug Support Panel Breaker Position
The unit ships with the support panel in the top feed position (shifted to the bottom of the AX). These
positions are to comply with UL and NEC wire bending space requirements.
1:
If you are bottom feeding the AX, loosen the 4 nuts from the sides of the enclosure.
2:
Reposition the support panel with the breaker on the main lugs to the top position.
3:
Tighten the nuts.
CAUTION:
Wire openings must have fittings, grommets or fish paper lining material to
protect wire and cable insulation from damage by sharp metal edges and to
prevent air leaks.
When using the 400 A breaker frame you must replace the plastic lug covers
for compliance and safe operation.
Line input may enter the auxiliary enclosure from the top
or bottom.
The ETC supplied line feed interconnect cables will feed
through the side conduit knockouts to the adjacent DRd.
See
Route and Connect Interconnect Cables to Adjacent
for interconnect cable
termination instructions.