Bonding when 2 circuits in one box?

[jch]

I have a wall switch box that will have 2 circuits in it:

1) A pass-through circuit with just a junction between incoming and outgoing wires; and

2) A light switch at the tail end of a separate circuit.

I have attached Circuit #2's bonding wire to the box because it is the circuit that is powering the switch.

Questions:

a) Do I need to also attach Circuit #1's bonding wire to the box? Circuit #1 is just passing through the box (with a junction inside the box).

b) Do I need to make sure that both circuits are on the same phase? Or is it okay for them to be opposite phases?

Thanks,

[dlarrivee]

Everything in the box has to be tied together and tied into the box, afaik.

[cacher_chick]

I cannot answer the question with certainty, but I do look forward to further explanation if that is true.

IMO, if the box is bonded, (which it is required to be if it is metal), I don't see any benefit to attaching the other conductor only because it passes through the box. This would only create another splice, which again, IMO is unnecessary.

[jwelectric]

All equipment grounding conductors that enter the box are to be tied together with the largest being bonded to the box.

[dlarrivee]

I cannot answer the question with certainty, but I do look forward to further explanation if that is true.

IMO, if the box is bonded, (which it is required to be if it is metal), I don't see any benefit to attaching the other bonding conductor only because it passes through the box. This would only create another splice, which again, IMO is unnecessary.

It's a redundancy thing though...

[jch]

What I'm doing is moving the light switch on to a different circuit and preserving the original circuit's connections to the downstream outlet(s).

It's a plastic box (if that matters).

[LLigetfa]

It sounds like you might be exceeding the maximum number of conductors in the box. What size box and how many conductors?

[jwelectric]

What I'm doing is moving the light switch on to a different circuit and preserving the original circuit's connections to the downstream outlet(s).

It's a plastic box (if that matters).

there is no need to bond a nonmetallic box