Group Metering

[Seven-Delta-FortyOne]

I'm looking at the Eaton 1MM, 4 meter stack.

I haven't done one in a minute, I understood that there is a common connection point for the utility feed on the bussing, that all 4 meters are attached to. Basically the same set up as a single meter main, but common bussing that 4 meters attach to.

I can't find any wiring info or pictures on the inter webs, but the PG&E rep called me the other day and said he thinks we need a disconnect before the meter stack, because "there is no place to land the utility feeder" in that stack.

That doesn't make sense to me, because whether you have a disco ahead of the meter stack or not, you still need to land the feeders. Unless he's saying that it gets split after the disco into 4 individual feeders to each meter, but I don't think that's how they are made.

I'll call my rep at the supply house Monday, but it's chewing on my mind right now.

This pic is the best I can find from Eaton:

 

[tortuga]

Some are 'all in one', some are expandable and take the terminal box:

 

[Master Nater]

yes, they make those terminal boxes as tortuga shows. but if you're under 2020 or 2023 code, you've gotta ensure that those disconnects have separate covers with dividers betweeen the service disconnects, otherwise it does not meet the 2020/23 fingersafe requirements of 230.71(B).

if that's the case, you're better off just putting in the main single service disconnect. then, you can continue using the meter stack you're planning on using.

 

[Seven-Delta-FortyOne]

yes, they make those terminal boxes as tortuga shows. but if you're under 2020 or 2023 code, you've gotta ensure that those disconnects have separate covers with dividers betweeen the service disconnects, otherwise it does not meet the 2020/23 fingersafe requirements of 230.71(B).

if that's the case, you're better off just putting in the main single service disconnect. then, you can continue using the meter stack you're planning on using.

But why the disco ahead of the meter stack? If PG&E wants it I guess they can have it, but I don't see a code issue as there is less than 6 disconnects, and I'm not understanding the termination issue.

Does each meter have its own set of lugs on these, or is it common bussing?

 

[Master Nater]

But why the disco ahead of the meter stack? If PG&E wants it I guess they can have it, but I don't see a code issue as there is less than 6 disconnects, and I'm not understanding the termination issue.

Does each meter have its own set of lugs on these, or is it common bussing?

first, let's find out whether it's even an issue. what code cycle are you on?

 

[Seven-Delta-FortyOne]

2023

 

[Seven-Delta-FortyOne]

So it appears that this particular meter stack would not meet 230.71(B)4, without an upstream service disconnect, as the side where the disconnects are located are not "separate compartments".

 

[Master Nater]

it was a long road, but we circled back around to comment #3. good luck, sir.

 

[Seven-Delta-FortyOne]

I'm a slow learner.

Thank you for the assistance.