Use of metal Conduit as Ground path and Use of Sealing Locknuts

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jap

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ptonsparky said:
It

It actually looks like that is not designed for that connection. The connection to right is not correct either. Note the nut and how few threads are made compared to the left. It's been clustered.
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Maybe a little but not enough to hurt anything.

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J

jap

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I'd guess the load side Phase conductors are crimped and stacked also since there's a service disconnect on both sides of the meter but probably a better connection than bolted on mechanical lugs.

JAP>
 
electrofelon

electrofelon

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wwhitney said:
Are sealing locknuts designed so that their teeth dig into the metal enclosure as well as a regular locknut, while still compressing the sealing material the correct amount?

Cheers, Wayne
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I would say not much thought or design was put into these things, same with rain tight EMT connectors. Both will often not work as intended. If you tighten the sealing locknut too much, the sealing ring will deform and break. Typically you can only get them a little snug, and then tighten the regular locknut on the other side. Usually the teeth of the sealing locknut don't even touch the enclosure. I would be curious about the testing process for these and how they pass. They need to have a recessed groove for the o-ring and be larger. They typically don't even fully cover the hole

I generally view these as just meeting a code requirement, and not serving any sort of purpose.
 
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