CCCs - Relay Panel

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JLEECME

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Searching through the forum history I found this thread which kind of runs along with my question so I thought I woudl revive it.

If you have an application where an area uses a relay panel so you actually only have 3 lighting circuits but becaues of the relay panels you have 20 switch legs coming from the relay panel out. They could all be energized at any given time. The owner wants a single conduit ran from the relay panel out to a J-box. My stance is that you would have to count all the relay circuit (switch legs) as a separate current carrying conductor and it doesn't matter that it is only 3 circuits.
Agree or disagree?
 
I am not sure I understand the situation. When you say that all wires could be "energized" at the same time, that is not the same as saying they could all be carrying current at the same time. If, for example, all the wires could have voltage applied, and if the various relays within the relay panel determine which wires actually carry current, and if the relaying scheme is designed such that if one wire carries current another wire is prevented (by its relay) from carrying current at the same time, and if as a consequence you could not have current flowing in all 20 wires at the same time, then you would not have to count all 20 as being CCCs. I would need more information about the setup (a sketch would help), in order to give an opinion. However, lacking any supplementary information, I would start with the expectation that all 20 wires are CCCs, until it is proven otherwise.
 
The relay panel will be timeclock controlled this is an office setting interior lighting only so really all relay switch legs would be turned on at say 7AM and off at 6PM. Therefore if all relay circuits are energized each individual switch leg would be counted as a CCC regardless of how many circuits there are. So say I have 27) 277V relay switch legs spread across 5 circuits, if I install the way the owner wants I need to derate conductors 45%.
 
Can you mount the realy panel in a place that would make it convenient to branch out the lighting legs from there?

Maybe you can get by with fewer relays, requiring fewer lighting legs.
 
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