Subpanel with 220v double pole breakers only

Has a 4-wire feed. It’s not necessary for separation/isolation, since there are no neutrals, correct? TIA.

Isn’t there two neutrals connected to the busbar?


Wrong. Four wire feed, so one is a neutral and one is a ground. These must still be isolated/separated. In the case of a hot feed shorting to ground (ground fault) at an appliance you will have “objectionable current” on the neutral from the sub back to the service panel.


IMO it’s wrong, ground bus should be bonded to the panel and neutrals should be isolated by removing the green scew.


If located in the same structure, they always need to be separated. Also, white colored conductors are not to be used as ground and cannot be reidentified.

I’m wondering if they left the grounds in the main panel that looks to be to the right of this panel.

I know pictures can be deceiving but the branch circuit wires at the 30 amp breaker appears to be undersized also.

Anything is possible, but that would only add to improper installation. EGCs need to be in the same raceway as other circuit conductors. No matter how you slice it, the pictured sub is not correctly wired.

Yes, EGC bus required and separate the EGCs from the neutral bus. For clarity I would call this 240 not 220.


Who figured out where the orange conductor terminates?

The orange and brown are the ungrounded feeder conductors. They both terminate on the panel bus terminals.


It appears the white are used as neutrals and the bare as EGCs, only 1 EGC is missing. 2-pole 240v breaker does not necessarily mean that the circuit is 240v only. By running a neutral with it, 120v loads can also be powered from one of the 120v legs.


Unusual residential panel. Looks like a commercial panel.

I’m not so sure, it’s a Square D Homeline panel, Homeline is as the name implies designed and marketed for residential home use.


I meant commercial job. I’ll let the post stand so your comment makes sense. I know that they only warrantee them on resy. Not sure if they prohibit commercial use. I’d have to research that.

Morning, Robert…
Hope to find you well today.

I tend to refer the EGC grounding terminal, for/to an enclosure, as a Ground Terminal. This is done on my part to avoid any confusion to Power Busses and Neutral Bus Bars with numerous circuit conductor terminals in an panel.
Would this be an appropriate descriptive term?

I would use the word terminal to describe a single connection point. If there is multiple connection points I would call that a bar. So your use of the term ground terminal (singular) is IMO something that would refer to a singular connection point. At the least I would add the word bar to the end of ground terminal when referring to what IMO is properly called an equipment grounding conductor bar or EGC bar.

This sounds like talking past each other. You can have a ground terminal on a ground strip/bar.

I would say yes - but I’m in Ohio and you know we are always wrong. BTW I do wear my big boy pants when I come to this forum.

Thank you.
Equipment Grounding Conductor Bar or EGC bar. Power and Neutral Busses seems to repetitive to include Ground/ing Bus, to me anyway, causing unneeded/wanted/unwarranted confusion.