Based on the second diagram in this question on feeding two subpanels from a single main breaker panel, I would like to know the best way to split the single feeder cable to two feeder cables for each subpanel.

Because the wires are all 2GA Cu, they appear to be too large for wire nuts and pigtails. Can a terminal bar (like those used for ground/neutral bars) be used for this purpose, to split a single 2GA wire into two 2GA wires?

  • 2
    To do a T-splice, see my answer here. Jan 31, 2017 at 0:20
  • Ah, that looks like a terminal block but insulated. Thanks.
    – Hari
    Jan 31, 2017 at 0:24
  • How are those secured within a junction box though?
    – Hari
    Jan 31, 2017 at 0:26
  • They just lay there loose, same as a wire nut. The kit comes with plugs that go into the screw holes (really hex key holes) so nothing is exposed. You are to tighten them down to a specific torque spec, called out in the instructions or molded onto the case. And then, they're not going anywhere. Get one whose maximum wire size is your size, so the wire insulation fits fairly snug in the holes. Jan 31, 2017 at 0:28
  • Thanks. I wasn't sure if they were supposed to be affixed to the box, like a normal terminal block would be.
    – Hari
    Jan 31, 2017 at 0:36


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