Metal staples

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georgem

Member
In residential wiring, does NEC code prevent the use of metal cable staples when anchoring NM sheathed cable to the side of framing members?
 

wayne123

Senior Member
Location
North Carolina
Re: Metal staples

I use the plastic staples that have 2 small nails on them. I don't believe there is a code saying not to use metal ones though. If you haven't tried the plastic ones, I recommend them. They are much easier to use and I have found that they are more forgiving on romex.
 

bennie

Esteemed Member
Re: Metal staples

I agree with the above. I like the two nail plastic staples.
I am surprised that metal staples are used for anything except wire fences.
 

bphgravity

Senior Member
Location
Florida
Re: Metal staples

Back when I was a fresh and green first year apprentice, I got an opportunity to perform a "hot check" with an experienced electrician on a few units on a multi-family project.

We came to one circuit that was instantly tripping the breaker when switched on. Knowing how each unit is wired, the electrican disconneted the feed in to the first outlet to see if it was down line or in the homerun. As it turned out it was in the non-accesible homerun cable. (NM)

The electrician then instructed me to go down to the work trailer and get him a two-pole 60 amp breaker. Totaly lost and confused, I did what he said. When I got back, he explained to me that the rough-in crew was notorious for hammering the romex staples in too hard on the cables.

He then proceeded to connect the circuit to the 60-amp breaker. He switched it on and POP, did it again and POP! On the third try, it held. He then connected the circuit back up to the appropriate breaker and with a slight chuckle stated, "took care of that staple".

Knowing what I know now, I get sick to my stomach everytime I think of that day. This person was responible to ensure my training, and the electrical integrity of that unit.

I wonder where that guy is now. If you are on this forum, I hope you reading this from jail! :mad:
 

roger

Moderator
Staff member
Location
Fl
Occupation
Retired Electrician
Re: Metal staples

Although I have always used metal staples, I can see the safety in using the plastic ones if unknowing, inexperienced, or uncaring people are involved.

Bryan, I have one problem with your post,
with an experienced electrician
that had to be a typo. ;)

Roger
 

bphgravity

Senior Member
Location
Florida
Re: Metal staples

Experienced by way of time, yes.

QUALIFIED, A big NO! :p

I dont even want to get into some of the others things this guy did. You will all have nightmares! :eek:
 

bennie

Esteemed Member
Re: Metal staples

I worked for a journeyman who said "electricity comes from the earth and has to return. It comes up the power pole and goes back on the water pipe.

The strange part was, this guy was one of the best residential wireman I ever met. He did great work.
 

iwire

Moderator
Staff member
Location
Massachusetts
Re: Metal staples

Back to the staples, here in MA insulated staples are required for some NM.

Part of 2002 MEC 334.30
Where staples are used for cable sizes smaller than three 8 AWG conductors they shall be of the insulated type or listed non-insulated staples driven by staple guns shall be permitted.
8/2 NM needs insulated staples, 8/3 NM and larger does not. :confused:

For the larger sizes I like the plastic two nail type.
 

-marty

Senior Member
Location
Alaska
Re: Metal staples

I have always used metal staples. They don't have to be tight. The state ei wants the wire to be able to move with a little force. I drive a metal staple next to the box and use my ul listed T50M (?) stapler on the rest of the wire. It saves a lot of time.
 
A

a.wayne3@verizon.net

Guest
Re: Metal staples

Roger i agree,metal staples have been in use for many years.It is the rough in guys defect not the staples defect that causes pressure shorts,I flip :mad: when i walk into on my guys houses and see him with a 28 oz. estwing hammer hitting a staple like it was a 16d nail.As far as blowing the short clear with a high amperage breaker,that is in the same class as grabbing a ground to use as a neutral :eek: We have one guy that couldnt tell you the first code article if need be but can pass all inspections and when hot checked there is very rarely a problem in his houses
go figure :confused:
 
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