The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Industrail Control Panel bonding per 409.108
by sparkyinak
Yesterday at 03:17 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
sparkyinak 8
Texas_Ranger 8
Potseal 6
Who's Online
0 registered (), 208 Guests and 6 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#217072 - 04/22/16 06:42 PM Table 39
brsele Offline
Member

Registered: 07/29/08
Posts: 88
Loc: Northern Ontario
So Ontario is adopting the new code starting May 1st.
As I believe most of you have been working with the new code for a year now, I have a question with regards to the new table 39.

As per 8-104(6)(a), when would somebody put an 89A calculated load on a 100A service?

Or is somebody manufacturing main breakers now rated for 100%

Thanks... Bruce

Top
2014 / 2011 NEC & Related Books and Study Guides
#217073 - 04/23/16 02:35 PM Re: Table 39 [Re: brsele]
twh Offline
Member

Registered: 03/11/04
Posts: 898
Loc: Regina, Sask.
8-200(3) says calculated loads for residential services are not continuous.

Top
#217074 - 04/23/16 06:03 PM Re: Table 39 [Re: brsele]
brsele Offline
Member

Registered: 07/29/08
Posts: 88
Loc: Northern Ontario
Thanks TWH.
This question came to me as I've been asked to wire a new house being built with electric heat. A 100A service was specified.

This is the first time in my life I've been asked to supply a 100A service for a new house and electric baseboard heaters.

So I did a load calculation and came up with 85A.

I always thought that the max. calculated load for a 100A service was 80A and the max. for 200A was 160A.

I'm wondering if this is a case where I was originally taught wrong and never questioned it, or if something changed and I never noticed because everybody asks for a 200A service.

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals