600 AMP CT cabinet and 600 amp out door panel grounding?

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BCSANGUS

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ELECTRICAIN AND GENERAL ENGINEERING CONTRACTOR
Who can tell me the proper places to ground between CT cabinet and out door panel. Both 600 amp. Will be using 2 ground rods 10' apart. Thanks
 
Our POCO has detailed drawings on grounding/bonding. Neutral is bonded to ct cabinet with large ground bar. Service GEC is landed in service disconnect.
 
tom baker said:
Our POCO has detailed drawings on grounding/bonding. Neutral is bonded to ct cabinet with large ground bar. Service GEC is landed in service disconnect.
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thanks, what power company. I have not done one like this in a long time.
 
Since you are installing the POCOs cash register, you should check with your POCO, see what size can, ct mounts ect that they require. I would submit a drawing and have it approved first.
 
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Like infinity said, you need to be a little more clear about whether you are talking about where to connect the electrodes to or bonding between the two pieces of equipment.

Very briefly: the CT can is bonded to the service neutral conductor. However depending on the construction of the can and your POCO requirements, it might not be "directly" bonded to the neutral, and instead you may run a supply-side bonding jumper connected to the neutral at the service panels. See 250.64(D) for connecting grounding electrodes to services with multiple enclosures. I often like the gec busbar method, where you connect all the electrodes to a busbar and run a tap to each service enclosure.
 
Locally, CT cabinet is bonded to the neutral as is the service panel. GECs are allowed from either but most often originate in the panel,.
If th cabinet has no provisions,a stud bolt kerney is often used.
stud bolt.png
 
infinity said:
Are you asking about the GEC?
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electrofelon said:
Like infinity said, you need to be a little more clear about whether you are talking about where to connect the electrodes to or bonding between the two pieces of equipment.

Very briefly: the CT can is bonded to the service neutral conductor. However depending on the construction of the can and your POCO requirements, it might not be "directly" bonded to the neutral, and instead you may run a supply-side bonding jumper connected to the neutral at the service panels. See 250.64(D) for connecting grounding electrodes to services with multiple enclosures. I often like the gec busbar method, where you connect all the electrodes to a busbar and run a tap to each service enclosure.
Click to expand...
Thanks. Do you need bond bushings any particular place? All holes are punch cut, no concentric knockouts.
 
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