Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
So this has a locknut on it but no bushing. Is a sperate bushing required? I assume no beccasue it has an insulated throat?
Hub Bushing
- Thread starter Alwayslearningelec
- Start date
Dsg319
Senior Member
- Location
- West Virginia
- Occupation
- Wv Master “lectrician”
You are correct. No separate bushing needed.
ptonsparky
Tom
- Occupation
- EC - retired
Correct. No bushing required.
Joe Villani
Senior Member
- Location
- Westchester County NY
Typically stainless steel
Joe Villani
Senior Member
- Location
- Westchester County NY
Just be careful with the spec.
Often times the specs call for these hubs to be grounding type
It comes with a bonding locknut. You could also purchase the grounding locknuts separately.
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
Nema 4x..why?
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
You're correct that is spec most of the time. I believe it's a locknut with a screw on it
If it's stainless steel there's going to be a galvanic corrosion issue with the hub. We started switching to stainless steel hubs to prevent the issue.
However, if the design and specifications called for this, then that would become a design problem.
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
I think those would probably cost less too.
- Location
- Illinois
- Occupation
- retired electrician
The issue would become protecting the threads at the hub. The SS hub will not have the protected sleeve that the one you showed does.
You will need approval if the specs do not specify the SS hub. They might accept a length of heave duty heat shrink over the hub and the first couple of inches of conduit.