CHAPTER 2: INSTALLATION
2-12
EPM 4500 SUB METER – INSTRUCTION MANUAL
WIRING
2.2.6 Single-Phase, Three-Wire Wiring
The line association and polarity of the current transformers must be followed or the
meter will not be correctly installed.
1. Line sources Line 1 and Line 2 are fed through the current transformers (CTs). Line 1
points towards the ‘dot’ or H1 of the CT while Line 2 points away from the ‘dot’ or H1
of the CT. The MCI board runs CT terminals CT#1 to CT#24 with each terminal
connected to Meter 1 (M#1) to Meter 24 (M#24). The number of CT terminal and
meter connections is dependent on the number of suites available. For example:
– Meter 1 (M#1) connects to CT#1
– Meter 2 (M#2) connects to CT#2
– Repeated for M#3 to M#24
2. After completing all current transformer terminations, connect four (4) current
connectors and then remove the twenty-four (24) shorting links.
3. Follow all local codes for installation requirements; e.g. conduit, fused disconnect,
distance, and wiring.
6. Installation of “L” (0.1 A inputs) and “H” (CL10 or 5 A inputs) are the same. For 12,
18 and 24 point models, use meter points M#1 to M#12, M#1 to M#18, and M#1 to
M#24, respectively.
If breakers are energized, shorting links must be installed before:
1. disconnecting the CT headers
2. replacing or installing meter heads on the panel.
Bodily injury may result if shorting links are not installed!
