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
Calling all Non-US members!! (Non-US only)
by aussie240
Yesterday at 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
Wow, that was close!
by jraef
11/28/16 07:06 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
sparkyinak 7
Trumpy 6
Who's Online
0 registered (), 249 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#101753 - 02/24/03 02:08 PM CEC 116(1) Question
RobbieD Offline
Member

Registered: 02/23/03
Posts: 238
Loc: Canada
Sorry I meant question about CEC 12-116(1)

Hello it's me again. I hope that alot more Canadians use this site because its really good. Well my question is about binder head screws.CEC 12-116(1) I was talking to someone at work about terminating stranded copper wire at the binder head screw of a receptacle. I know that for solid conductors this is no problem. I thought that if the wire was stranded you had to use special training washers to hold the strands together under the screw head,(to confine them). Is this a general practice or does nobody do it? Now this is what the book I have said,(Electrical Code Simplified by PS Knight).It said to use training washers is a general practice. I looked in the CSA CE Handbook and it doesn't really give a great description of the rule it just says basically make sure the strands are not all frayed sticking out of the screw head beacuse it could cause a short or a ground. Makes sense to me also! Well I have one book saying the use of training washers is general practice, and the CE Handbook not really saying much about it except keep the termination looking nice. Does anyone out there have their thoughts on CEC 12-116(1)? Basically I am wondering traing washers for stranded wire or not.
Thanks!



[This message has been edited by RobbieD (edited 02-24-2003).]

Top
2014 / 2011 NEC & Related Books and Study Guides
#101754 - 02/24/03 07:29 PM Re: CEC 116(1) Question
electric-ed Offline
Member

Registered: 07/08/02
Posts: 184
Loc: Canada
How the strands are kept under control is a "workmanship" issue. It is left up to the individual electrician.

In some cases the construction of the equipment terminal, and/or the instructions supplied with it will apply.

For # 12 (7 strand) on receptacles, all I have ever done is twist the strands tight with my side-cutters, and proceed as if it was solid.

Ed

Top
#101755 - 02/24/03 08:49 PM Re: CEC 116(1) Question
frenchelectrican Offline

Member

Registered: 02/06/03
Posts: 938
Loc: Wi/ Paris France { France for ...
may i suggested the idea how i did with stranded wires what i do is i strip the insluation cover off little longer than useall ( normal) then twist the straid the OPPISTIE drection and make it tight then bend the same way as solid conducters btw it will grip very tight

just my thougt to help others

merci marc
_________________________
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)


Top
#101756 - 02/25/03 04:20 PM Re: CEC 116(1) Question
CDN_ELECTRICIAN Offline
Member

Registered: 01/22/03
Posts: 75
Loc: Concord,Ontario,Canada
Another suggestion a little more expensive but works good when using standed wire.

Use a Spec. Grade device. they have clamps to secure the wire rather than try and twist around a terminal screw. Much more secure.

Same situation if your using #12 AWG wire, the terminal screws on a standard device do not tighten down very good on #12.

Remember whenever the device is used there is a small amount of heat generated at connection points, therefore there is expansion, when it cools the tension on the wire may not be the same and over time.... Loose connection and well... who knows.

Just my two cents

Top
#101757 - 02/26/03 01:28 PM Re: CEC 116(1) Question
RobbieD Offline
Member

Registered: 02/23/03
Posts: 238
Loc: Canada
Thanks for your input Guys!

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