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
Today at 02:39 AM
Photo Upload Tutorial
by DanK
Yesterday at 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
1 registered (LongRunner), 218 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#54577 - 08/02/05 10:43 AM Romex - How Tight?
Wolfman56 Offline
Member

Registered: 10/06/04
Posts: 14
Loc: Vancouver, WA USA
I know of some who like to have the romex pulled tight between staples, around corners, and even on home runs in the attic. And have it tight all the way into the box. They run the staple down enough that it won't pull through when the cable is "pulled tight".
I like the staple to make "light" contact, so that the cable is secure, and then sweep it generously at corners etc. My premis is that the conductors will be expanding and contracting from seasonal temp. changes, especially in the attic. Also from some heating at heavy loads. It needs to move. If it's pulled and stapled tight it will someday rub through the cover and short, possibly start a fire.
Am I overboard here? So many guys pull tight that it appears to be ok. Are there any instructions in print by the manufacturers?

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#54578 - 08/02/05 11:22 AM Re: Romex - How Tight?
Edward Offline
Member

Registered: 12/14/02
Posts: 309
Loc: California
Welcome.

I am with you on this. I don't pull the very romex tight, do not staple very hard, and do not do sharp bends around corners.

MHO

Edward
_________________________
Thanks
Edward

Top
#54579 - 08/02/05 03:12 PM Re: Romex - How Tight?
George Offline
Member

Registered: 02/23/02
Posts: 380
Expansion and constracion are probably not issues, you usually cannot pull the cable that tight.

I believe 5 times the diameter is the minimum bend radius.

Top
#54580 - 08/02/05 03:22 PM Re: Romex - How Tight?
straightedge Offline
Member

Registered: 03/13/02
Posts: 86
Loc: Mesa, AZ
If I can get away with it I don't like to even use staples. When needing to troubleshoot later on when the attic is insulated you can lift up on the romex and see where it's going.

Top
#54581 - 08/02/05 05:26 PM Re: Romex - How Tight?
Surfinsparky Offline
Member

Registered: 07/29/05
Posts: 77
Loc: merritt island fl usa
I have never done residential work not a home wiring expert.But I think staples being too tight caused the code to go with AFCI breakers or maybe breakers were just not expensive enough.

Top
#54582 - 08/02/05 06:00 PM Re: Romex - How Tight?
livetoride Offline
Member

Registered: 01/11/05
Posts: 109
Loc: san diego ca usa
I agree I do not staple romex "tight" and I try to leave slack around bends and boxes. I do service work now days and hate it when there is no way to get any extra wire without tearing up the walls or pulling new wire or adding/moving boxes. Rod

Top
#54583 - 08/03/05 05:04 PM Re: Romex - How Tight?
foestauf Offline
Member

Registered: 08/01/05
Posts: 51
Loc: Florida
When I first started I made my romex tight and very secure and bleh bleh.
Now I have realized that it is a waste of time to staple any wire that is just running overtop of the trusses. I always leave some slack, not enough to where it is looping in the atic or that I feel somebody could be doing an attic walk and catch it with thier foot. Using spinners also helps this process along.
Wiring should be the fastest process you do in the home.
Boxing and cutting in should take the longest time followed by strapping.
Today it took me from 7am until about noon to box the house, from bout 1 until 3 I had half the house wired:-)
But then still to strap and cut in uggg heh.

Top
#54584 - 08/03/05 07:09 PM Re: Romex - How Tight?
BobH Offline
Member

Registered: 10/16/04
Posts: 134
Loc: Newfane, N.Y USA
Yeah I've seen some guys actually pound the romex with a hammer to get it at a right angle. I like it loose myself.



[This message has been edited by BobH (edited 08-03-2005).]

Top
#54585 - 08/04/05 06:49 AM Re: Romex - How Tight?
DougW Offline
Member

Registered: 06/08/03
Posts: 1083
Loc: North Chicago, IL
Coming from the land of pipe, the few times I've run NM it's been with generous angles and a little room to move.

Staples were secure, but not cutting into the sheathing.

Top
#54586 - 08/04/05 07:36 AM Re: Romex - How Tight?
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
We use Buckle clips over here in New Zealand to fasten our flat cables to timber.
It allows them to move a tad.
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin

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