ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Israel
by Texas_Ranger. 02/18/19 02:01 PM
250.104
by gfretwell. 02/16/19 01:08 PM
PurpleAir Recalls Power Supply Units
by Admin. 02/14/19 08:43 PM
Utility Company Programs
by katty81. 02/14/19 11:11 AM
AFDD's coming to the UK
by Trumpy. 02/14/19 12:29 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
1 registered members (Texas_Ranger), 8 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Table 39 #217072
04/22/16 08:42 PM
04/22/16 08:42 PM
B
brsele  Offline OP
Member
Joined: Jul 2008
Posts: 98
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

Tools for Electricians:
Re: Table 39 [Re: brsele] #217073
04/23/16 04:35 PM
04/23/16 04:35 PM
T
twh  Offline
Member
Joined: Mar 2004
Posts: 947
Regina, Sask.
8-200(3) says calculated loads for residential services are not continuous.

Re: Table 39 [Re: brsele] #217074
04/23/16 08:03 PM
04/23/16 08:03 PM
B
brsele  Offline OP
Member
Joined: Jul 2008
Posts: 98
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.


Featured:

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

 

Member Spotlight
Trumpy
Trumpy
SI,New Zealand
Posts: 8,260
Joined: July 2002
Show All Member Profiles 
Top Posters(30 Days)
Admin 7
andey 3
Popular Topics(Views)
253,236 Are you busy
189,883 Re: Forum
179,588 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.024s Queries: 15 (0.004s) Memory: 0.9503 MB (Peak: 1.0765 MB) Zlib enabled. Server Time: 2019-02-18 21:01:38 UTC