Main Bonding Jumber
- Thread starter sam34
- Start date
- Status
- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
Re: Main Bonding Jumber
Sam34, is it rated as service equipment?
It didn't come with a busbar jumper?
(Hard to picture something so big!
)
Sam34, is it rated as service equipment?
It didn't come with a busbar jumper?
(Hard to picture something so big!
)
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Re: Main Bonding Jumber
I'm with George usually large service equipment comes with a equipment grounding bus and a busbar bonding jumper. But to answer your the requirement in 250.24(B) is for an "unspliced main bonding jumper". Would two conductors in parallel be considered one bonding jumper?
I'm with George usually large service equipment comes with a equipment grounding bus and a busbar bonding jumper. But to answer your the requirement in 250.24(B) is for an "unspliced main bonding jumper". Would two conductors in parallel be considered one bonding jumper?
Re: Main Bonding Jumber
Thank you guys for your reply, I think it should comes with a equipment grounding bus and a busbar bonding jumper. Somewhat I thought we have to provide it our self. Is all service entrance equipment should come with bus bar bonding jumper? or at certain amperage rating? Thanks again
Thank you guys for your reply, I think it should comes with a equipment grounding bus and a busbar bonding jumper. Somewhat I thought we have to provide it our self. Is all service entrance equipment should come with bus bar bonding jumper? or at certain amperage rating? Thanks again
bphgravity
Senior Member
- Location
- Florida
Re: Main Bonding Jumber
From a performance standpoint, I don't see why paralleling the main bonding jumper, if equivalent in size to 250.28 requirements, would be a problem.
From a code standpoint, it doesn't appear the NEC indicates an allowance or a restriction of this practice.
From a performance standpoint, I don't see why paralleling the main bonding jumper, if equivalent in size to 250.28 requirements, would be a problem.
From a code standpoint, it doesn't appear the NEC indicates an allowance or a restriction of this practice.
- Location
- Massachusetts
Re: Main Bonding Jumber
Sam, 4000 amp switchgear is not sitting on a shelf waiting to be bought it is built to order.
When you order it tell them to build it with a MBJ.
Just like you tell them top bottom feed etc.
Sam, 4000 amp switchgear is not sitting on a shelf waiting to be bought it is built to order.
When you order it tell them to build it with a MBJ.
Just like you tell them top bottom feed etc.
Re: Main Bonding Jumber
I have seen instances when large gear is ordered and someone forgets to mention it's going to be used as service equipment. No only is the MBJ missing, but the label listing it as service equipment is. Amazing how difficult it is to have that service equipment label field installed.
I have seen instances when large gear is ordered and someone forgets to mention it's going to be used as service equipment. No only is the MBJ missing, but the label listing it as service equipment is. Amazing how difficult it is to have that service equipment label field installed.
- Status