Hendrix
Senior Member
- Location
- New England
If going from a 4-0 riser to a 200a fused disconnect, to meter sockets, to disconnects shouldn't 4 conductors be run from the first 200a disco?
Elect. Service question
- Thread starter Hendrix
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qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
Is the first disconnect a poco requirement? By the NEC yes, 4 conductors.but since you're in front of the meter sockets it may be a poco standard. Ask them.
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
Milbank makes a combo cold sequence meter can with main breaker. If you do this, it's easy, clean and you don't need a disco after it as it is the service disconnecting means.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Does the 200 amp disconnect qualify as the service disconnect or is it a meter disconnecting means as mentioned in 230.82(3)?
Hendrix
Senior Member
- Location
- New England
Not a POCO standard around here. Just the way the electrician wants to do it.
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
I believe it does. IMO if you use the the method of the OP (non-fusible switch, then meter, then fusible switch/MB) you would would use 230.83(3) and bond the neutral at non-fusible switch, the meter can is bonded to neutral and the fusible switch (bldg. disconnect) is bonded to neutral and the grounding electrode system connection. In other words meter and non-fusible switch are upstream of the main disco and are grounded to the grounded service conductor. It just seems the milbank solution does it "all in one" and saves a redundant switch.
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
As I read the OP again I realize he is saying fusible switch ahead of the meter. In that case I think that would be the main and service bonding would occur at that point. But that raises other issues-where are you going to get a meter can that has an isolated neutral and would POCO rules allow this. I mistook this at first as a required cold sequence job.
Hendrix
Senior Member
- Location
- New England
The POCO would allow it, but I was thinking the same thing about the meter can.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
In my opinion the first disconnect would need 4 wires to the meter. I believe they make an isolated neutral meter can.
See 250.142(B) Exception 2. It allows grounding the meter on the load side of a service disconnect with the grounded conductor (but there are some requirements to meet in order to do that). I would think at the meter you would then need to separate neutrals and grounds.
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