Bonding for Communication Systems-250.94

[ThreeTenFifteen]

I am having difficulty understanding the definition of the conductor serving the intersystem bonding termination. For example, on a new building with an established grounding electrode system and utilizing a common busbar as described in 250.64(F)(3). If a wire type connection was made from said busbar to the intersystem bonding termination point, what would that conductor be defined as, and does it need to conform to the installation guidelines outlined in 250.64? Electrically parallel path, not exposed too physical damage, etc.

Thanks!

 

[jaggedben]

That would be a bonding jumper, and I'm not aware of any requirement for it to follow 250.64 if it only bonds to the IBT.

 

[ThreeTenFifteen]

That would be a bonding jumper, and I'm not aware of any requirement for it to follow 250.64 if it only bonds to the IBT.

So in theory, this could be installed in a metallic raceway without being bonded on both ends. I find that interesting as this bonding jumper connects directly to the GEC.

 

[jaggedben]

The bonding at both ends is to avoid inductive choke on the way to the grounding electrode. Since this isn't that path maybe that doesn't apply.