There's no formal (code) location requirement except that no more than 50 feet of unprotected cable may extend inside the building.

It is most convenient to obtain a good ground near the electric service. Since telco and electrical ground conductors must be bonded together (this IS a code requirment), common sense would dictate that they should be adjacent to each other. While a NID/protector can be installed anywhere on/in the building, a bonding wire would still have to be run to the electric service in order to be a "legal" installation.

Utility companies frequently use "joint" trenching on underground installations, resulting in the NID/protector being in the same area as the electric meter. Still, this isn't always the case. For aerial installations, the sky's the limit; I have seen NID's installed on window sills on the second floor!


Ed Vaughn, MBSWWYPBX