Cold Sequence, to bond or not to bond

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Inspectorcliff

Inspectorcliff

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Colorado
For those who are not familiar, Cold sequence is when a fused disconnect is required by the local power supplier ahead of the meter. Do we make this our first disconnect and tie our grounding conductors to our grounded conductor and bond our can? OR do we go through the meter housing to our service entrance equipment and do our work there? or do we tie it all together at both locations? I know this is kind of vague, but lets use the scenerio that we leave a pad mount xformer, hit the C.S. disconnect, then the meter housing, then the S.E. all on one 4x4 piece of plywood, prior to going else where.
Thanks as always this is a great site. Oh, I have my opion. It is to tie everything at the first disconnect, regardless if its C.S. or not. If its sealed by the power company it is a fused disconnect it has to be accessible, And what "electrician" does not care a pair of side cutters???
 
I am checking

I am checking

It may be just a disconnect on services 200 amp and larger. I was thinking it was a fused disconnect, but, I don't have there blue book in front of me. Thanks for the question, I will write when I get the correct info.:roll:
 
Where is the "service point"? Has the POCO stated this? Is it possible that this disconnect is part of the utility owned equipment?

Pete
 
Cliff, I ran into this a few years back with Excel Energy. I was required by the state inspector to bond at the disco ahead of the meter. As far as cutting a seal goes, I always contacted the POCO first to let them know. Never had an issue. Good luck.
 
When I have installed cold sequence meterpacks, the lower area of the disconnect with the switch is sealed by the POCO, but the outer door and the upper area containing the fuses are accessible without breaking a POCO seal.

I have always used this main disconnect as the termination point for the grounding electrode system, myself.
 
Xcel

Xcel

Ok, as from the horse's mouth per say, single phase up to 320 amp services with a (?)possible fault current, shall have a fusible disconnect ahead of the meter, a circuit breaker may be used if approved by Xcel's Engineering prior to installing, I believe after talking to Excel, that the point of service is different depending on the application, Commercial or Temp/Const. Even though, I still feel the bonding grounding shall originate prior to the meter in the first disconnect. Period, done, Ok, I know there is room for argument but I just wanted to answer my own question:cool:
 
Inspectorcliff said:
. . . I still feel the bonding grounding shall originate prior to the meter in the first disconnect.
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That would require the meter to have its neutral isolated from its enclosure. Do they exist?
 
cold sequence continues bond or no

cold sequence continues bond or no

:mad: I don't think you isolate the grounds and grounding in the meter socket, It is not a disconnect or a sub-panel, it is the same as any other arrangement except its backwards. Besides, so many meters have the grounding lug for the grounding conductors. Frank and Larry, thanks.
 
Mr Pete

Mr Pete

pete m. said:
Where is the "service point"? Has the POCO stated this? Is it possible that this disconnect is part of the utility owned equipment?

Pete
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It depends, First so we are with the same outfit, its now Xcel Energy, and the service point is different if its a commerical its on the secondary of the xformer, If its residential its the top of the meter socket, If its temp/const. I don't remember where it is. (heck I am lucky to remember where my truck is?):cool:
 
Yes, they manufacturer neutral isolation kits for meter socket enclosures. If the meter enclosure does not meet the exception in section 250.142(B), the grounded conductor cannot be bonded to the meter socket enclosure.
 
thank you

thank you

rcarroll said:
Cliff, I ran into this a few years back with Excel Energy. I was required by the state inspector to bond at the disco ahead of the meter. As far as cutting a seal goes, I always contacted the POCO first to let them know. Never had an issue. Good luck.
Click to expand...
Thanks, quite gentlemen of you. I used to let the meter reader find it. I didn't say that did I?
 
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