ok so i'm trying to clean up the main panel and add a sub panel here at my spot. when we first got here, we replaced the main but didn't rewire the existing, just connected the hots to new breakers and the neutrals to the neutral bar. there is no ground rod, there is EMC running overhead to the water supply and a neutral connected to the water supply line.
what i'm running into is this...
the lights overhead, t-12's are wired directly into the main and to turn the lights on i've got to walk through the dark warehouse and flip the breakers. they are on 5 breakers. there are 4 additional breakers that run the existing outlets in the building. so of these 9 hots i have 5 neutrals and no grounds as everything is grounded via emc. there are 3 emc pipes running out of the main, one of them carries 2 circuits and one neutral, the neutral is shared and split at the first junction box, this one is easy. the other 2 conduits have 2 neutrals each, one has 3 hots (1 light, 2 outlets) the other has 4 hots (3 lights, 1 outlet).
now i'd like to leave the outlets directly connected to the main and put my lights in a sub panel so that i can add a remote relay to them.
what i don't know how to do is determine which neutral is going to which hot. i'm going to assume that the lights are on one neutral in the emc and the other neutral is for the outlets.
if i use a multimeter and run from hot to neutral in the breaker box it says OL and then reads 120v.
neutral is bonded to ground so it reads the same for ground bar, OL and then 120v.
any thoughts? i don't really wanna plug an extension cord into the outlets and check for continuity over 100 feet but that is an option.
Resolved...
so i shut off the breakers and disconnected one neutral. then turned the breakers back on one at a time. the lights that didn't come on correspond to that neutral. so by process of elimination we determined what wires go where. now to bend pipe and cut it without damaging the wires inside!! fun!