In an attempt to ensure accurate electrical load center phase connection for a neurio home energy monitor, the installation video around 2:40 mentions connecting to the red wire to another Phase "let's call it, Phase B" then mentions "every other breaker is on a different phase" with a A B A B diagram for each (tandem) breaker. Per the install diagram on the install video, is it safe to assume the red wire is on a the fourth breaker from the left top, if the first black wire is connected to the leftmost top breaker?

A more pertainant question in my case, per my load center, image below, the second breaker from the top left is on a separate phase from the top tandem breaker, in this two phase load center?

Is there any relevant recommended general industry encyclopedia type resource for this?

The neutral bus bar has white wires connected to it, and the ground bar has the no insulation on the wiring?

Thanks in advance!

enter image description here

  • Neurio_W1_Quick_Install_Guide_-_2_phase.pdf came with the unit.
    – user289394
    Oct 19, 2016 at 0:07
  • This looks like a sub panel fed from the 50amp double pole breaker since I don't see another feed. All double pole breakers are on L1+ L2 . I hope the breaker is rated for back feed not to say it would not work correctly but may cause inspection issues or need to be replaced with a really sharp home inspection prior to a refinance or sale.
    – Ed Beal
    Oct 19, 2016 at 0:36
  • @EdBeal -- the backfeed rating can be assumed unless the breaker is marked as having Line and Load terminals on it Oct 19, 2016 at 0:51
  • I would agree but in my state they have to be listed for back feed. I have failed an inspection in the past for this and now I just spend a few more bucks and get a panel with a main.
    – Ed Beal
    Oct 19, 2016 at 13:04

1 Answer 1


This explanation is sufficient, the second breaker is on a separate phase.

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