Bond nipple between meter and main panel.

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mrobles

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Stamford, CT
I did a temp 120/240 service with a meter and a main panel under it. They were connected wit a metal nipple. In the meter pan the nipple was in a concentric knock out with a locknut and a plastic bushing. In the panel the nipple was in a threaded hub that was bolted to the top of a rain tight panel. The inspector failed the service because he said I needed a bonding bushing in the meter pan. Am I correct with 250.92(B)2? The nipple will be bonded at the hub end and should not need a bond bushing at the other end.
 
The service raceway is only required to be bonded at one end. A threaded hub satisfies this requirement. Since the neutral should be bonded at both the meter pan and at the panel a bonding bushing within the meter pan would serve little purpose.
 
This one where some utilities have requirements that exceed the code. Ours requires bonding at both ends of all service raceways that run between enclosures.
Don
 
Bryan, around here they pretty much do what they want. They say it is for safety purposes. We have to use a lever by-pass, locking jaw, 200 amp meter socket on ALL meters, even temporary power poles. Even if you wanted to put a light bulb in your dog house !!

On 480 volt 3 phase services we have to cold sequence the metering. We have to put a disconnect before the meter base and it cannot be used as the main disconnect. This makes a requirement for two disconnects.

It is simple, they got it, we need it. We cannot go anywhere else for power. I would like to see some basic rules in place to help the customer.
 
mrobles,

Bottom line, connecting the nipple by the hub bonds the nipple per NEC.

You'll have to verify with your local PoCo if they have "other" requirements than the NEC that would tell you to do more.
 
Bryan,
How does the utilities have jurisdiction over raceways between enclosures?
Click to expand...
That's easy...no compliance...no power. The requirement for bonding both ends is in their service installation manual. Here the utility inspects up to and including the service disconnect. It doesn't matter if the installation has met the NEC and has a green tag...it must also meet their rules or you don't get power.
Don
 
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