CHAPTER 2: INSTALLATION
INSTALLATION OF METER, MCI BOARD, AND CTS
EPM 4
5
00 SUB METER – INSTRUCTION MANUAL
2–15
2.3
Installation of Meter, MCI Board, and CTs
2.3.1
Procedure
Note
The use of the following procedure is mandatory. Certification requires a visual inspection
of the current transformers and the voltage taps on the incoming feeder phase wires.
Z
Locate a section of wall to mount the EPM4
5
00 back box and the
MCI board box.
Keep in mind that the metal conduit must be mounted between the
two boxes to allow the four large block connectors on the MCI
board to connect to the meter head. The conduit is 2 inches long.
Z
Determine how the back box and the MCI board box will be
oriented on the wall.
• Remove the square punch-outs from the side of the back box
that will be interfacing with the MCI board box.
Z
Mount the metal conduit to the side opening of the back box prior
to mounting the box to the wall to ease the spacing between boxes
when mounting the MCI board box.
Z
Mount the back box to the wall, or in the wall for flush mount
installations.
• Connect the breaker panel box to the back box of the meter with
a metal conduit through which the 3 or 4 feeder phase voltage
taps will be run.
• Make sure to use at least a ¾-inch diameter conduit to allow for
all wires to pass easily.
Z
Screw the corresponding opening on the MCI board box to the
conduit and mount the box to the wall.
Z
Locate the incoming feeder phase (hot) wires at the top of the
breaker panel.
• Tape the incoming feeder wires according to phase with black,
red and blue electrical tape for identification purposes.
Z
Extend the CT wires with AWG #16 stranded with black, red and
blue jackets so as to be the correct length to pass through the
conduit and reach the MCI board.
• Extend the white wire of each CT with a white wire, but place a
black, red or blue electrical tape on the end of the extended wire
to identify the correct neutral.
• Refer to these CT white wires with tape as white/black, white/red
and white/blue respectively.
Refer to the Phase Association tables in
when wiring the MCI board.
Failure to improperly observe proper phase association will result in incorrect
metering data.
Z
Remove the incoming feeder hot wires one at a time and place
each CT over the proper feeder wire.
