GE Industrial Solutions EPM1500 Single Point Submetering System - Manual (Page 19)

CHAPTER 2: INSTALLATION
EPM 1500 SUB-METER – INSTRUCTION MANUAL 2–9
2.3 Installation of Meter and Current Transformers
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 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 taps and the 6
CT wires will be run.
Make sure to use at least a ¾-inch ID conduit to allow for all 9 or 10
wires to pass easily.
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 fuse block in the meter back box.
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.
Z Remove the incoming feeder hot wires one at a time and place
each CT over the proper feeder wire.
Make sure that the colors of the CT leads correspond to the color of
the tape on the phase feeder.
Make certain that the white wire from the CT is closest to the line
side of the feed, away from the top of the breaker panel.
For split-core CTs, make sure that the X1 is toward the line side.
Run the CT secondary wires through conduit to the back box of the
meter.
Z Tap the three feeder wires with AWG #12 stranded wire with black,
red and blue jackets taking care to match the color of the
insulation of the #12 wires to correspond to the color of the tape on
the feeder wire.
Z If the service is 4-wire, tap the neutral connection with a #12 AWG
stranded wire with a white jacket.
Z Run the six (6) current transformer wires black, white/black, red,
white/red and blue, white/blue to IA+, NA–, IB+, NB–, IC+, NC–
respectively on the fuse block (see Internal Fuse Block on page 2–
11).