Multiple meter banks

[liquidtite]

As an example say for a two family dwelling unit you have
two meters for each floor and a 200amp service coming in .

do you have to split up the 200amps so each panel coming from meter one and meter two

Will be rated at 100 amps


so 200 amp main disco out side and each panel will be at 100 amps coming in

so that you can’t over load your service conductors.

 

[brantmacga]

Each meter should have its own disconnect; whether that is at the meter or at the loadcenter. Size it according to your load Calc for each unit. If you need 200A at each, tell the utility what you need.


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[liquidtite]

Each meter should have its own disconnect; whether that is at the meter or at the loadcenter. Size it according to your load Calc for each unit. If you need 200A at each, tell the utility what you need.


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Ok so how would you size the main disconect

if if you have five meters each one of them has their own
100 amp disconnect at the meter or at the panel .

does that mean your service has to be 500 amps or do you do
a demand factor .

 

[electrofelon]

Ok so how would you size the main disconect

if if you have five meters each one of them has their own
100 amp disconnect at the meter or at the panel .

does that mean your service has to be 500 amps or do you do
a demand factor .

When you have a single set of service conductors feeding multiple service disconnects, that common set needs only be sized to the load calc, not the sum of the discos. 230.90 (A) Exception 3.

 

[kwired]

:thumbsup:

When you have a single set of service conductors feeding multiple service disconnects, that common set needs only be sized to the load calc, not the sum of the discos. 230.90 (A) Exception 3.

But if you have a single main disconnect ahead of those others then you need service conductors sized per overcurrent protection in that main.


ADD: Is possible to have 5 - 100 amp service disconnecting means, but a total load calculation of only 200 amps and common supply conductors with ampacity of 200 amps, even though there is 500 amps total of protective devices there.

 

[liquidtite]

:thumbsup:

But if you have a single main disconnect ahead of those others then you need service conductors sized per overcurrent protection in that main.


ADD: Is possible to have 5 - 100 amp service disconnecting means, but a total load calculation of only 200 amps and common supply conductors with ampacity of 200 amps, even though there is 500 amps total of protective devices there.

Ok understood thank u

 

[brantmacga]

if if you have five meters each one of them has their own
100 amp disconnect at the meter or at the panel .

Depends.... if using a gangable meter stack, you’ll typically have SER cable running to each unit so the OCPD will be at each meter.

I have seen for example on a 4-unit building, a 2-gang meter on each side of the building splitting each unit, and the loadcenters back-to-Back behind that in a utility room with OCPD at the loadcenter.


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