ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
by Rabbit. 03/20/18 08:23 PM
Recall notice: Southwire wi-fi wall switches
by sparkyinak. 03/15/18 06:03 PM
Goodman Manufacturing Recalls Modular Blowers
by Admin. 03/13/18 10:40 PM
MAAX Spas Recalls Hot Tubs and Swim Spas
by Admin. 03/13/18 10:29 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
1 registered members (dougwells), 28 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Demand Meter #161585
04/04/07 06:25 PM
04/04/07 06:25 PM
cgw  Offline OP
Joined: Jul 2004
Posts: 133
Rochester NY
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.

Work Gear for Electricians and the Trades
Re: Demand Meter [Re: cgw] #161611
04/05/07 07:22 AM
04/05/07 07:22 AM
HotLine1  Offline

Joined: Apr 2002
Posts: 6,935
Brick, NJ USA
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.


Re: Demand Meter [Re: HotLine1] #161904
04/09/07 12:31 PM
04/09/07 12:31 PM
cgw  Offline OP
Joined: Jul 2004
Posts: 133
Rochester NY
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).


2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Posts: 421
Joined: September 2005
Show All Member Profiles 
Top Posters(30 Days)
Admin 5
Trumpy 5
Popular Topics(Views)
244,531 Are you busy
181,660 Re: Forum
171,705 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.018s Queries: 15 (0.004s) Memory: 0.9506 MB (Peak: 1.0753 MB) Zlib enabled. Server Time: 2018-03-21 05:20:21 UTC