Bare, Covered or Insulated

[busman]

I'm just full of questions this morning. I can find where GEC and EGC can be Bare, Covered or Insulated. I cannot find the same for Main Bonding Jumpers, System Bonding Jumpers and Supply Side Bonding Jumpers. Is this an oversight? I used the search function in my 2014 NEC.

Thanks,

Mark

 

[augie47]

250.28 states:
(A) Material. Main bonding jumpers and system bonding
jumpers shall be of copper or other corrosion-resistant material.
A main bonding jumper and a system bonding jumper
shall be a wire, bus, screw, or similar suitable conductor

From that wording it sure seems like it could be bare since factory bond jumpers are not insulated

 

[busman]

250.28 states:
(A) Material. Main bonding jumpers and system bonding
jumpers shall be of copper or other corrosion-resistant material.
A main bonding jumper and a system bonding jumper
shall be a wire, bus, screw, or similar suitable conductor

From that wording it sure seems like it could be bare since factory bond jumpers are not insulated

I agree, I just thought the NEC should be more explicit, especially since they are for GEC and EGC. It seems that since wire is flexible and bus or screw are not, that being clear that a BJ inside an enclosure is OK to be bare even though it could bend and touch live parts would be a good idea.

Thanks,

Mark

 

[infinity]

I agree, I just thought the NEC should be more explicit, especially since they are for GEC and EGC. It seems that since wire is flexible and bus or screw are not, that being clear that a BJ inside an enclosure is OK to be bare even though it could bend and touch live parts would be a good idea.

Thanks,

Mark

An EGC is permitted to be bare so they would be subject to the same potential issue that you've mentioned. Since bare bonding jumpers aren't explicitly prohibited they're allowed.