3
1. Turn Off Power
Disconnect or switch power off before attempting to install, connect,
disconnect or service the power meter or the external current transformers
(CTs).
Distinguish and then identify the neutral and hot line(s) (hot wire(s), usually
black or red). Label the neutral and then hot wire(s).
System Type
Labeling
CTs Needed
Wiring Diagram
3-Phase, 4-Wire
Label the hot wires as L1, L2 and L3.
Label the neutral as N.
3
See below
3-Phase, 3-Wire
Label the hot wires as L1, L2 and L3.
There is no neutral.
2
See Appendix
Single phase, 3-Wire
Label the hot wires as L1 and L2.
Label the neutral as N.
2
See Appendix
Single phase, 2-Wire
Label the hot wire as L1.
Label the neutral as N.
1
See Appendix
2. Determine System Type
Power Monitoring Installation
