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Demand Meter #161585 04/04/07 05:25 PM
Joined: Jul 2004
Posts: 136
C
cgw Offline OP
Member
Can any one suggest an instrument I can use connected to a service (say for 1 month) to determine the electrical demand? This is specifically to comply with NEC 220.87(1)Exception. I was thinking of an E-mon Series 2000 but I think I would need more than one if I wanted to use it for both 240-1 and 208-3.

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Re: Demand Meter [Re: cgw] #161611 04/05/07 06:22 AM
Joined: Apr 2002
Posts: 7,235
HotLine1 Offline
Member
The E-mon requires a voltage reference, as do all meters that I am aware of.

There are KW/KWHr recorders available (buy or rent) that will do what is needed for 220-87 Exc.

This info is available here (NJ) from the utility companies. That info is acceptable for NEC compliance, and should be easy to obtain, IF the job you are involved in has utility power.

GE rental is a source for rental test equip; as are many others if you Google.

WW Grainger has recording test equip available if you want to go that route.

John


John
Re: Demand Meter [Re: HotLine1] #161904 04/09/07 11:31 AM
Joined: Jul 2004
Posts: 136
C
cgw Offline OP
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9 out of 10 times I can just get the demand from the utility. Once in a while we need to add power to a sub-panelboard or transformer in a larger building or to a building without a demand meter (e.g. around here church buildings do not have demand meters).


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