Is there a code that requires an antenna cable surge arrestor to be (1) Outside and (2) in a Box?

[Installer]

This is actually a big issue, didn't get help on the Bonding Grounding Forum, there may be a bigger knowledgebase here
We take our Antenna cables for Electronics equipment (radios, GPS, satellite) , and feed them through a Polyphaser (antenna cable surge arrestor) in a NEMA3 or NEMA4 enclosure outside, with the Bus Bar attached to a 4/0 down comer before we send them into the Equipment Room in the Building.
I've been seeing them this way for many years now.
Is their a Code or Requirement that states this, or is it a Trade Practice?
Can a Polyphaser be mounted on a Bus Bar inside a Building?
Personally I don't see why not, but if I do it, I'm sure I'll be criticized and asked to redo it.
Thank you in Advance
Installer

 

[hbiss]

The same people who read the Grounding and Bonding Forum read every forum here, don't you? I don't know where people get the idea that only certain people read certain forums. Sorry if we weren't quick enough for you.

To answer your question, the PROTECTORS only need to be located as close as practicable to the location where the cable(s) enter the building. It makes no difference if that is inside or out, though I prefer outside simply because if they self destruct there is less potential for damage or fire.

-Hal

 

[don_resqcapt19]

If by a "4/0 down comer" you are talking about a lighting protection conductor, they cannot be connected to that.

They must be connected to the intersystem bonding point, if one exists or to one of the list items in 800.100(B)(2).