ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Trumpy 5
Recent Posts
What do you do?
by gfretwell. 09/24/17 12:05 PM
75 kva tranformer
by sparkync. 09/23/17 06:41 PM
Another generator question
by gfretwell. 09/23/17 04:15 PM
Supporting conduit bodies
by ghost307. 09/18/17 12:12 PM
Thermal Imaging Camera upgrade
by Potseal. 09/18/17 11:57 AM
New in the Gallery:
Gallery Test
Popular Topics(Views)
240,954 Are you busy
176,749 Re: Forum
168,598 Need opinion
Who's Online Now
0 registered members (), 32 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#166100 - 07/12/07 07:49 PM Service calculation  
jem  Offline
New Member
Joined: Apr 2007
Posts: 8
nc
Single family home with mother-in-law apartment, 200 amp service, all electric except for gas heat. Customer wants to install a 50 amp hot tub. Using 220.83(A) to determine if service is of sufficient capacity since no HVAC is being added. Should the existing HVAC load and new hot tub load be added to 220.83(A)(1)through(A)(4)before taking first 8kVA of load at 100% and the remainder at 40%.


2017 / 2014 NEC & Related Books and Study Guides

#166140 - 07/13/07 10:25 PM Re: Service calculation [Re: jem]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,864
Brick, NJ USA
My read is to do the calcs on the EXISTING items, then add the hot tub.

One may also consider installing an amp recorder to 'see' the real world numbers to have actual (real) load.

John

PS: Welcome to ECN


John


Member Spotlight
waymag
waymag
dallas, texas, USA
Posts: 67
Joined: January 2002
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.021s Queries: 15 (0.003s) Memory: 0.7433 MB (Peak: 0.8594 MB) Zlib enabled. Server Time: 2017-09-26 09:01:43 UTC