Commerial Service Grounding and bonding

[Part-Time]

Do i need to bond/ground this service to the Metal frame of the building
it is bolt to the steal frame of the wall which is also screwed to the Metal frame of the building

 

[chris kennedy]

Is that a service? Looks to me like you have a 480V feeder coming to this. As far as bonding the SDS, asuming your bonding jumper is compliant you may be able to slide by on 250.70(4) for the GES connection.

 

[Part-Time]

This is Supplied by a main disconnect outside the building from the utility Power
the gutter is used just to hook it up

 

[ActionDave]

For the SDS, if the building steel your grounding electrode, I would say yes, since you need your GEC on the lug or buss where your main bonding jumber is.

 

[augie47]

This is not a service, as Chris stated, if it's fed from an outside disconnect.
IMHO, a grounding electrode conductor would still need to be installed from the SDS. Dave may be correct but I don't see many inspectors accepting the framework.

 

[ActionDave]

This is not a service, as Chris stated, if it's fed from an outside disconnect.
IMHO, a grounding electrode conductor would still need to be installed from the SDS. Dave may be correct but I don't see many inspectors accepting the framework.

I'm agreeing with you- Bolting the panel to the steel is not enough to meet code.

 

[Part-Time]

it is fed by Three 4/0 and One #1 AWG ground wire no neutral
the only neutral is off the transformer

 

[ActionDave]

it is fed by Three 4/0 and One #1 AWG ground wire no neutral
the only neutral is off the transformer

And that makes the transformer a Separately Derived System. Where did you bond the transformer XO?

 

[augie47]

I also don't see the system boning jumper. HOw many conductors did you install to the secondary panel ?

 

[Part-Time]

all panels, transformer, and the disconnect or bonded with lugs inside the gutter XO is bonded at the transformer

 

[tom baker]

Where is your GEC connection to the transformer?