Mult gang meter GEC

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splinetto

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Missouri
Does this sound right? What I have is a 2 gang meter with 2 200a breakers and 2 sets of 4/0 AL ser. One going to each unit..Each unit has its own water servive....What I was planning on doing was to run the GEC from the service to the closest water servive and then jumper over to the next....Does that sound right? And the next question was on the size of the GEC....Table 250.66 looks like a #2 al is ok for 4/0 al....but something is telling me to add the both 4/0 form each set of feeders and get my GEC from that...But after reading I cant find anything that is telling me to add them together...What am I missing?
 
Size the GEC to the largest ungrounded service entrance conductor. What

size wire do you have feeding the 2 gang meter socket ? Look up that size

wire in 250.66.
 
250.66 Size of the largest Ungrounded Service Entrance Conductor OR EQUIVALENT AREA FOR PARALLEL CONDUCTORS. what size of conductors are feeding the meters?
 
I always thought that service entrance conductors are on the load side of the meter...and the line side would be service lateral...
 
splinetto said:
I read them and I dont get your point
Click to expand...

You have to size the GEC to the size of the service, the service stops in the

meter socket in this case at the 200a disconnects, the 4/0 ser cables are

feeders. Once agian, what size conductor feeds the meter socket ? That is

the size conductor needed to use table 250.66 . I know you have done this

many times before, what the heck is the problem this time ?
 
If this is a meter main, there may be no service entrance conductors. If that is the case, see Note 2 at the bottom of table 250.66. So Benaround is right -- what size wires SHOULD be on the line side of the meter to serve the connected load?

If the breakers are separate from the meter enclosure, then Note 1 may be more appropriate (summing the areas of the load side conductors).
 
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