Grounding/Bonding bar in IT closet/room, wire size requirement

[victor.cherkashi]

Hi forum members,
I can't find if there any requirement in NEC or any other code for wires size to/from Grounding/Bonding bar installed in IT closet/room. Since each receptacle for equipment in that closet/room is provided with EGC, the Grounding/Bonding bar on wall is serving for other purposes.
See the picture below, is there any minimum wire size requirement in code for wire size #1, #2, #3, #4

 

[don_resqcapt19]

It is a design issue, not an NEC issue. What ever you want to use, or what ever the specs require.

 

[hbiss]

Awful lot going on there IMO. Where did that illustration come from? Looks like something BICSI would conjure up.

-Hal

 

[victor.cherkashi]

This is what I thought, the wire sizes (connected to IT bonding bar) are not NEC's concern.
If you you google "BICSI and TIA 607-B & ISO/IEC 30129" you find table with recommended cross section depended on wire length. #6 wire is minimum recommended for 13ft or less.

 

[qcroanoke]

Awful lot going on there IMO. Where did that illustration come from? Looks like something BICSI would conjure up.

-Hal

Or Motorola R-56

 

[dkidd]

ANSI 607 seems to be the applicable standard

https://www.cablinginstall.com/arti...n-of-a-standard-that-has-come-a-long-way.html