10
CURRENT TECHNOLOGY
®
PX3
TM
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
If desired, punch holes for branch circuit conduits at this time or wait until the
PX3 and panelboard are mounted to the structure .
Mount the joined panelboard and PX3 to the building structure using
construction methods and hardware appropriate for your site . Be sure to
fasten both the PX3 enclosure and the panelboard enclosure to the building
structure .
If you choose to mount the PX3 as a stand-alone enclosure, locate the
PX3 enclosure according to the guidelines in the following section
“Electrical Connections” .
Phases, Neutral* and Ground:
Connect the phase, neutral and ground
conductors . Connect the phase conductors to the lugs labeled “A,” “B,” and
“C” on the ISM and the ground and neutral* conductors to the lugs labeled
“G” and “N .” The terminal lugs of the ISM in the PX3 must be electrically
connected by the installer to the appropriate terminals in the panelboard .
Before making connections, read and remove the WARNING tag from the
ground lug marked “G” on the ISM .
Overcurrent Protection:
Connect the phase conductors to circuit breakers in
the panelboard . Current Technology
®
recommends using circuit breakers in the
range of 60 to 100 amps .
Note: If applicable, please consult specifying engineer’s recommendation prior
to making connections.
* Delta-configured PX3 models do not have a Neutral Lug.
Punch Conduit Openings
Mount the Panelboard
and PX3 Assembly
Electrical Connections
Conduit Openings
tnbpowersolutions.com/current_technology
14”
H
(H = 9” for PX3
50-100 & 14” for
PX3 125-200)
■
ALLOWABLE AREA FOR CONDUIT ENTRY
Figure 5
Standard
PX3 Without
Disconnect
Figure 6
PX3 With
Disconnect