User Manual – Rev BE AMETEK Programmable Power
MX Series 93
3.13 Junction Box Accessory
An optional wiring junction box (P/N 7003-416-1) is available which may be
used to connect the outputs of 2 to 6 MX cabinets together. The junction box
also has a protective ground connection, which MUST be connected to a
suitable protective earth ground.
Each junction box has four sets of terminals for phase A, phase B, phase C and
Neutral. Each terminal is lined up with a strain relief on each side. The outputs
from the MX45 cabinets connect to the “MX SYSTEM OUTPUT” side of these
terminal blocks. The load can be connected to the “LOAD”. Note that the wiring
is not supplied with the system and must be provided by the end user. The wire
gauge of the load connection must be sized to handle the maximum current in
the low voltage range of operation.
The “MX SYSTEM OUTPUT” side of the terminal block will accept up to 8 wires. If
the external sense connection is made at the junction box, one of these can be
used to connect the sense wiring.
NOTE: Do not swap output load wires or sense wires between phases,
as damage to the system will result.
The “LOAD” side will accept 2 wires. The wire size range shown in Figure 3-22
refers to mechanical compatibility of terminal block only. This information does
not reflect required wire size. The wire sizes accepted by the terminal blocks of
the junction box on each side are shown in Figure 3-22.
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