ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AreMetal Ladders Ever OK For Electrical Work?
by gfretwell. 01/22/18 01:15 AM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 5 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Q on Canadian panels... #101565
12/19/01 06:56 AM
12/19/01 06:56 AM
S
sparky  Offline OP
Member
Joined: Oct 2000
Posts: 5,344
Hello!
As I live in VT, i am seeing many Canadian built modulars shipped in. I have noticed that the main panels isolate the service entrance conductors , they have a 2nd smaller cover that is seen after the first outer cover is removed.
I am wondering if this is coincidence , or is there a Candaian code that requires this???

Thanks
Steve >>aka sparky
Vermont Electrician [Linked Image]

Tools for Electricians:
Re: Q on Canadian panels... #101566
12/19/01 07:38 PM
12/19/01 07:38 PM
T
Tony Moscioni  Offline
Moderator
Joined: May 2001
Posts: 144
CANADA
Hi Steve,

It's actually a CSA Standard that requires the manufacturers to have the main switch or circuit breaker located in a separate section of the enclosure.

Here's an excerpt from the applicable spec:

C22.2 No. 29-M1989
(Reaffirmed 2000)
Panelboards and Enclosed Panelboards

Industrial Products

7. Combination Service Entrance Panelboards
7.1 Scope
7.1.1
Clause 7 applies to panelboards rated at 600 V and less for service entrance use in nonhazardous locations in accordance with the rules of the Canadian Electrical Code, Part I.
7.1.2
Clause 7 applies to equipment in one enclosure that provides
(a) a service box; and
(b) a second compartment containing branch circuit overcurrent protection.
7.2 Definitions—See Clause 2.1.
7.3 General Requirements
General requirements applicable to this Clause are given in CSA Standard C22.2 No. 0, and Clause 3.
7.4 Construction
7.4.1 Service Box

7.4.1.1
The service switching means shall be manually operable with the box closed,* shall have no bare live parts exposed, and shall have overcurrent devices connected directly to such switching means.

*This does not exclude a construction where a decorative (nonmandatory) door covers the handles, provided that the opening of such a door does not allow access to wiring spaces.

7.4.1.2
The main switch or circuit breaker shall be located in a separate section of the enclosure and shall have a sheet-metal barrier, or the equivalent, of the same thickness as the walls of the enclosure; the barrier shall have bushed holes, or the equivalent, for the necessary wiring between compartments. Separate access covers and the means for sealing them shall be provided for compartments enclosing main switches or circuit breakers. The provision for sealing may be omitted where the main overcurrent device is rated 225 A or less and 250 V or less.


Tony Moscioni

Re: Q on Canadian panels... #101567
12/21/01 06:58 AM
12/21/01 06:58 AM
S
sparky  Offline OP
Member
Joined: Oct 2000
Posts: 5,344
Thank you Tony.
This is exactly what i am seeing. Even in 200A panels. It would seem CSA standards address the issue of 'Live Work' where our UL ( and other NRTL's) do not.

The jist of NFPA 70 E & subpart S could basically be stated as either shuting down, or in the cases where it cannot be, proper PPE to work on such, dictated by proximty, etc.....

As one can easily shut the main off here , the entrance conductors remain live to it,and exposed,,lacking the the simple isolation CSA addresses here.

We do not, per CSA example, put our NEMA $$$$ where our 'safety' mouths are...... [Linked Image]


Featured:

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

 

Member Spotlight
Theelectrikid
Theelectrikid
Levittown, PA
Posts: 810
Joined: April 2004
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 16
Potseal 15
Popular Topics(Views)
243,592 Are you busy
180,388 Re: Forum
170,861 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.021s Queries: 14 (0.003s) Memory: 0.9512 MB (Peak: 1.0754 MB) Zlib enabled. Server Time: 2018-01-22 09:46:02 UTC