Bonding Jumper

[TJRasor]

The main panel, at the house I am renting is directly behind the sub panel and all of the 220 circuits are in the main panel minus the water heater and pool pump (which has a number 6 bare bonding all metal parts of the pool and the motor casing and connecting back to the sub panel). The grounding electrode conductor is number 4 bare, connected to the neutral bar in the service panel, but other than that there are only neutrals from 220 circuits. The feeder is about 5 ft of 2/0 stranded aluminum to the sub panel and doesn't appear to be likely to fault (based on load and appearance). So my question is.. what is the danger in someone sinking the green screw on the neutral, in the sub panel, to complete the egfcp instead of replacing the feeder and isolating the grounds/neutrals in the sub panel? I can't picture the ground and neutral being in parallel and cant perceive any objectionable current in this situation.. but am still thinking I'm missing something.

Thanks!

 

[ActionDave]

Welcome to the forum.

I'd be happy to talk about the potential dangers of "sinking the green screw on the neutral, in the sub panel, to complete the egfcp" but I have no idea what that is.

Can you explain further?

 

[iwire]

If I am understanding you correctly this is one of those times where it would be tough to describe a real safety issue with it but the fact remains it is a code violation.

 

[TJRasor]

effective ground fault current path 250.4 (a) (5)

 

[George Stolz]

Is there currently no equipment grounding conductor is the subpanel supplying the pool equipment?

 

[iwire]

Is there currently no equipment grounding conductor is the subpanel supplying the pool equipment?

I am assuming (and you know how that goes) that the green screw is already in place.

 

[TJRasor]

iwire.. I was wondering if it just boiled down to a violation, and not a hazard. It's not my house, I'm not planning on doing anything about it and it was wired however long ago.. just trying to think of possible physical problems that could occur.

 

[TJRasor]

yes the sub panel is supplying the pool equipment, and no there isn't an existing jumper from main to sub panel. it already has a green sticker. The house was completely rewired before I moved in, but the 220s and feeders and main panel were left untouched.

 

[Smart $]

yes the sub panel is supplying the pool equipment, and no there isn't an existing jumper from main to sub panel. it already has a green sticker. The house was incompletely rewired before I moved in, but the 220s and feeders and main panel were left untouched.

FIFY

Used to be you could wire that way to another building or structure (and also provide a GES), but I don't believe you could ever do it in/on the same building or structure.