ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Air Compressor feeder conductor sizing
by Potseal. 01/15/18 09:08 PM
VDE 0100 to introduce AFCIs
by LongRunner. 01/15/18 11:38 AM
Under carpet cable?
by HotLine1. 01/15/18 09:57 AM
Any New Years Resolutions?
by Bill Addiss. 01/13/18 10:21 AM
diazed fuses
by RODALCO. 01/13/18 07:58 AM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 5 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
LOAD CALCULATION HELP #128244
12/05/02 11:19 AM
12/05/02 11:19 AM
S
SKETAR  Offline OP
Junior Member
Joined: Dec 2002
Posts: 2
BOCA RATON,FLORIDA,U.S.A.
I ADDED POOL HEATERS TO A ELECTRICAL PANEL OF A CLUBHOUSE AND THE INSPECTOR WANTS TO KNOW THE LOAD CALCULATION FOR THE EXISTING PANEL I CANT REMEMBER HOW TO CALCULATE THE EXISTING LOAD PLUS WHAT I ADDED ON CAN ANYONE PLEASE HELP.

Tools for Electricians:
Re: LOAD CALCULATION HELP #128245
12/05/02 12:31 PM
12/05/02 12:31 PM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Add up the labeled currents or voltampere rating of all existing loads that can operate simultaneously. Determine the current or voltamperes available at the existing panel and its feeder circuit.

In a simplified sense, additional load must be sized to not exceed that feeder rating--or 80% or the feeder rating for continuous duty.

Re: LOAD CALCULATION HELP #128246
12/12/02 08:43 AM
12/12/02 08:43 AM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
See 220.35 for existing loads. If you have to, you might get some relief from it.

Re: LOAD CALCULATION HELP #128247
01/03/03 08:15 AM
01/03/03 08:15 AM
T
The Watt Doctor  Offline
Member
Joined: Dec 2001
Posts: 435
Mont Belvieu, TX
As Redsy implied, get on the phone to the PoCo, and find out what the peak demand was for the last year. I'm sure that it will meet the requirements of 220.35.

Good Luck,
Doc


The Watt Doctor
Altura Cogen
Channelview, TX

Featured:

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

 

Member Spotlight
MarkC10
MarkC10
CA, Inland Empire
Posts: 43
Joined: September 2013
Show All Member Profiles 
Top Posters(30 Days)
sparky 24
Admin 19
Potseal 13
Popular Topics(Views)
243,508 Are you busy
180,293 Re: Forum
170,798 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.028s Queries: 14 (0.017s) Memory: 0.9572 MB (Peak: 1.0899 MB) Zlib enabled. Server Time: 2018-01-16 09:52:56 UTC