Installation Manual

STEP 17. Phase Conductors Monitored by Current Transformers

REMINDER: For the purpose of a Lumin installation, the top* row of breakers in an electrical panel is

always designated “A”. Whichever feeder leg supplies breaker Row A will be designated “A.”

NOTE: Lumin CTs are designated either “A” or “B”. Placing them on the incorrect leg of a circuit will

result in erroneous consumption data.

If the panel is a main-lug-only type as shown in Figure

B (no main circuit breaker) then the feeder on the left

will be Lumin Leg “A”.

If the panel includes a main circuit breaker, note that

the main breaker may contain crossover busing, with

the result that the feeder on the left feeds the right-

side bus bar and the feeder on the right feeds the left-

side bus bar. To identify A/B feeders when a main

breaker is present, consult the following page.

* All descriptions assume a top-fed electrical panel.

Figure B – Typical Main-Lug-Only Electrical

Panel Busing