Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
Can anyone tell what this brown/bronze thing is connected to the end of the connector?
What is this??
- Thread starter Alwayslearningelec
- Start date
ptonsparky
Tom
- Occupation
- EC - retired
It's used to bond the raceway so it doesn't act as a choke (I think that's the term) during lightning strikes.
hbiss
EC, New York NEC: 2017
- Location
- Little Falls, New York NEC: 2017
- Occupation
- EC
Never saw those available separately, always as part of a pipe ground clamp.
-Hal
-Hal
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
Proper name is a grounding or bonding hub.
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
Thank you.
Sure there are "several fittings" to use instead of this to accomplish same thing?
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
Yes that particular one is being used with a compression EMT connector in your photo.
Carultch
Senior Member
- Location
- Massachusetts
Inductor is the technical term. Choke is the trade slang.
The issue is that ferrous steel conduits add significantly to the inductance of the wire, when the current induced in it, can't flow out of it. As a result, it's required to install direct connection of the wire to it on both ends, when the wire in question is the GEC. Lightning pulses at high frequencies mean extremely high impedance and eddy current heating when there's an inductive section of the path, like a ferrous steel conduit.