Intersystem bonding

[Low-impendence2017]

I have a phone board on the second level and the intersystem bonding is located in down stairs electrical room. Can I take my #6 to building steel. Or does have to go back to intersystem per 800. There is a education. In 250.94

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[Low-impendence2017]

I have a phone board on the second level and the intersystem bonding is located in down stairs electrical room. Can I take my #6 to building steel. Or does have to go back to intersystem per 800. There is a education. In 250.94

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Ex


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[MAC702]

AFAIK, the intersystem bonding terminal is to make it convenient. It's not the required method.

 

[George Stolz]

800.100(B)(1) doesn’t seem to leave wiggle room. It shall be connected to the IBT.

They included a new option in 250.94(B), but neglected to instruct us to connect it to anything as required in (A). :slaphead:

The exception to (A) would be for buildings existent prior to the IBT requirement.

 

[Sahib]

The code intent, IMO, is to avoid two ground references at the phone board: one from connecting #6 to building steel ground and other possibly from coaxial cable shield connected to some other ground.