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Hello,


I'm not sure about this. Just got customer request, he has a Duplex, wants service Upgrade (200A) to serve 2 Addresses. 1 Building, split in half.

He wants 3 meters, 1 for unit1, 1 for unit 2, and a 3rd "House meter" for the whole house (both Duplexes).

Perhaps I just don't know this one, but I thought PG&E will only give 2 meters, 1 for each address.

Why would he ask for a "House meter", why not just 2 meters?
 

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Maybe he has been stung before by someone
Tampering with the meter
Or at least he's worried about it ?
Could have seen a hyped up media story about it.
 

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Yup extra meter is common and required above a certain number of units (NEC is two units but there are local exceptions). 210.25(B) requires a separate panel if there are any common area circuits in a building with two or more dwelling units.
 

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The Accidental Welder
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Don't get quite a few service changes because of the need for a house meter now. People just leave the existing decrepit service until total failure.

Often it isn't just adding the extra meter and panel, but you have to rewire to get those common loads off of the tenants service. Can get quite pricey with a front stairwell, rear stairwell, outdoor lighting, garage, and basement.

Used to be ok if owner lived there, now that's not good enough.

Many duplexes around here you'll see 2 fixtures where there would normally be only one, each tied to the separate service. Looks ridiculous.:laughing:
 

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Around here, a duplex has to be 2 completely independent units, and cannot share any "common area," laundry, hall, boiler, water, cesspool or sewer, etc. Just like 2 single family residences that share a common party wall. Even the basements are separate. When a duplex owner wants a "house meter" it's usually because an illegal apartment or apartments are going into the basement(s).
 

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Would you not have to upsize the service feeders to accommodate for the house panel? Assuming each unit will have a 100A panel. Or is there some derating that takes place allowing for the house panel?
 

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The Accidental Welder
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Would you not have to upsize the service feeders to accommodate for the house panel? Assuming each unit will have a 100A panel. Or is there some derating that takes place allowing for the house panel?
Pretty unlikely in these situations that the load(s) on the house panel would be large enough to increase the service size.

When adding it to an existing service, the load doesn't really change, just the distribution of the load.
 
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