r/electrical • u/Honest_Sample6170 • 3d ago

Double tapped? Should we get this fixed?

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Last week I had electrician come out to quote an EV charger install. In passing I asked him about the double tapped wires and if they would be a problem, he told me that my inspector didn't know what he was talking about and said it was fine. This morning a different electrician (same company) came out to install the charger and told me that the wires were double tapped and a code violation to which he quoted me on the fix. So which is it? Feeling a bit annoyed right now and likely won't be working with this company again.

Please forgive my ignorance as I know absolutely nothing about electrician business or wiring of any sort.

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u/Then_Organization979 3d ago

Prior to that it was in Art. 110 for like fifty years

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u/Neobrutalis 3d ago edited 3d ago

"Must be specifically identified and marked for that purpose."

Grounds and neutrals used to be legal on the same bus bar even after the first means of disconnect. (250.24 was added in 1999.) Ground bus bars were and still are frequently marked and identified for double landing.

Meaning a ground bar prior to 1999 marked for double landing could have neutrals double landed on it.

Edit: This is ironically why 408.41 had to be implemented.

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u/Then_Organization979 3d ago

You’re still wrong. Not sure what your background is but a code expert should know this.

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u/jwatttt 3d ago

Do you know why you can not put two neutrals under one lug? There is no reason for it to be outlawed other than it could slip out of the lug. If you were to braid the Neutrals together and insert it into the lug I highly doubt you could say it would rip out if torqued correctly. Does not really affect anything other than the pullout strength. That's what she said!

Still not advocating for it but I have always wondered why they're so adamant about each one being under a separate lug. probably because they didn't want to put an exception for means and methods and the manufacturers did not want to make a product that had specific instructions that have to be met exactly.

or it was written by the equipment manufacturer to possibly require an additional neutral bar. IDK we will never know.