ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
UL 508A SPACING
by ale348 - 03/29/24 01:09 AM
Increasing demand factors in residential
by tortuga - 03/28/24 05:57 PM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (ale348), 302 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Oct 2005
Posts: 5
R
rick68 Offline OP
Junior Member
Wiring up an R.V. Garage for a customer. County wants a load calc. on the prints. I've done load calcs on custome homes but am unsure on garages. I checked the code book, 99 nec, and am assuming to use the farm load calc on 220-40 ?? My calculations will include a 20 amp 120v. circuit for window ac ; 60 amp 220v. for arc welder; a 3/4 hp for garage door opener and some general recepts and florescent lighting.. any help on which calculation method to use... Thanx much!!

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

Joined: Mar 2005
Posts: 399
A
Member
Have you looked at 220.3 ?
Garages are included in the table.
Follow the steps and I think you will have your calculation.
Alan--


Alan--
If it was easy, anyone could do it.
Joined: Oct 2005
Posts: 5
R
rick68 Offline OP
Junior Member
Thanks Alan,

I actually went ahead and used farm load calc. and came up with a 74 amp load, which sounds about right. Funny, I called the supervisor for the elect. inspection dept. for the city the work is being done, and he couln't give me an answer.... said he would call right back... that was 3 days ago and still haven't heard back. The city requested the info on the prints before permit is issued, but they don't know how to do the actuall calc. themselves.. go figure......... anyway, thanks for the response!!

Joined: Jul 2004
Posts: 9,923
Likes: 32
G
Member
Quote
The city requested the info on the prints before permit is issued, but they don't know how to do the actuall calc. themselves.

That's why they wanted you to do it [Linked Image]


Greg Fretwell

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5