online diagram, testing tomorrow please help

online diagram, testing tomorrow please help

Postby KOOTA » Sun Jun 02, 2019 6:21 am

on a single line diagram of a mid, size building, as a rule of thumb do u put the METER before or after the TRANSFORMER????
I thought power company wanna charge on the low end of because they add a % to what is lost due to the transformer but I came across something that said for small residential and office Meter's after TRANSFORMER , but for mid to large METER IS BEFORE TRANSFORMER.
PLEASE HELP AND THANK YOU
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Re: online diagram, testing tomorrow please help

Postby KOOTA » Sun Jun 02, 2019 8:05 am

meter after transformer , kill switch or service switch after meter .
1) primary switch 2) trans 3) meter 4) service switch?? is service switch different that primary switch?
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Re: online diagram, testing tomorrow please help

Postby Yohai » Sun Jul 14, 2019 7:33 pm

Small buildings : Transformer than Meter
Med - Large buildings : Meter than transformer.
I am not sure why it is different between building sizes, I think it is because for small buildings the power company provides the transformer while bigger buildings the owner provides the transformer.
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Re: online diagram, testing tomorrow please help

Postby Coach » Tue Jul 16, 2019 1:57 pm

I'm no expert on this stuff but I believe it has to do with whether or not building is served by 3 phase power.
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