Aux Ground

[tonylo59]

Can the building steel be an acceptable attachment for the Aux ground required in NYC

 

[infinity]

What's an Aux ground? Do you mean something covered under 250.54?

250.54 Auxiliary Grounding Electrodes. One or more grounding electrodes shall be permitted to be connected to
the equipment grounding conductors specified in 250.118 and shall not be required to comply with the electrode
bonding requirements of 250.50 or 250.53(C) or the resistance requirements of 250.53(A)(2) Exception, but the
earth shall not be used as an effective ground-fault current path as specified in 250.4(A)(5) and 250.4(B)(4).

Welcome to the Forum.

 

[jumper]

I am confused on the question also? Do you mean Supplemental ground by chance?

 

[benedetti]

NYC Electric Code

NYC Electric Code

NYC Electric Code (Revisions to NEC 2008)
Article 250 Grounding and Bonding
Section 250.52
Subsection 250.52 (A) (1)- Delete the Exception in its entirety.

Otherwise, the 2008 NEC Article 250 is in full effect.
250.50 requires all available grounding electrodes available at each building or structure served to be bonded together to form the grounding electrode system.

The NYC Code can be found here: http://www1.nyc.gov/site/buildings/codes/electrical-code.page

 

[benedetti]

follow up

follow up

so...using 250.54 from 2008 NEC

1 or more Auxillary ground electrodes SHALL BE PERMITTED to be connected to equipment grounding conductors specified in 250.118 and SHALL NOT BE REQUIRED to comply with bonding requirements of 250.50 or 250.53(C) or resistance requirements of 250.56 but the Earth SHALL NOT be used as an effective ground-fault current path as specified in 250.4 (A)(5) and 250.4 (B)(4).

Nothing prohibits you from using building steel to connect to. Attachment requirements would be covered under 250.8.