LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
I have a couple of pics of a restaurant we wired years ago. I used MC everywhere it wouldn't show, and EMT where it would.
Knob and Tube - home inspection
- Thread starter Stevenfyeager
- Start date
- Status
readydave8
re member
- Location
- Clarkesville, Georgia
- Occupation
- electrician
On the jobs you did with MC, did the "C" stand for cable or for conduit?
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Metal Clad is a cable type.
hbiss
EC, Westchester, New York NEC: 2014
- Location
- Hawthorne, New York NEC: 2014
- Occupation
- EC
You don't know what MC is? What are you, some kind of residential only guy?
He posted pictures of it going to those boxes. See Art. 330.
-Hal
SSDriver
Senior Member
- Location
- California
- Occupation
- Electrician
Not sure if you know this but he's from Chicago, they still wire full houses in EMT and have crazy restrictions on different wiring methods in certain areas. I don't know all the details but I know they don't like Romex or flexible wiring methods very much.
Tips for EMT in dwelling unit
Hi all. Long time, no post; hope all of you are well. Normally, I don't get involved with too much residential work, but a buddy of mine -- who does mostly residential -- stepped aside and recommended me for this job because the contractor has mandated it be done in EMT due to local ordinance...
forums.mikeholt.com
romex jockey
Senior Member
- Location
- Vermont
- Occupation
- electrician
emt and nail plates???
~RJ~I noticed that too on the first picture. Didn’t see it on the last two.emt and nail plates???
Maybe the plumber was helping out that day...
Jerramundi
Senior Member
- Location
- Chicago
- Occupation
- Licensed Residential Electrician
EMT, Nail Plates, AND Firestop!emt and nail plates???
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
"Oh my!"
Jerramundi
Senior Member
- Location
- Chicago
- Occupation
- Licensed Residential Electrician
The point I was trying to make w/ @kwired is that my original comment NEVER claimed that ALL FMC was limited to 6 ft. It was a very short, general statement, that wasn't even the focus of my comment, that there are length limitations w/ FMC that can make things tricky... and there are length limitations in the NEC, as he himself points out.
The argument about ALL FMC being limited to 6 ft. was a different, subsequent comment referring to local amendments that I have to contend with.
Ultimately all of this was digression from the OP. I was merely trying to comment on the OP's hesitancy to replace K+T wiring by saying we love those kind of jobs around here and one way to do it, is via FMC, but... blah blah blah, there are some length restrictions that can make it tricky...
...and enter lengthy digression from the OP topic, lol.
readydave8
re member
- Location
- Clarkesville, Georgia
- Occupation
- electrician
I know what MC is, just wondered what the "C" stands for, I was thinking Cable but Larry reminded me CladYou don't know what MC is? What are you, some kind of residential only guy?
He posted pictures of it going to those boxes. See Art. 330.
-Hal
so its Metal Clad Cable
(was in reference to the theory that MC is a type of conduit mentioned in earlier posts)
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Generally speaking, MC and even EMT are considered no more "armored" than NM cable. Thus the nail plates over EMT.
romex jockey
Senior Member
- Location
- Vermont
- Occupation
- electrician
Fred B
Senior Member
- Location
- Upstate, NY
- Occupation
- Electrician
What do they have for us on Metal studs? I've seen metal studs that definitely would not have the 1.25 inch setback for the cable run holes.
hbiss
EC, Westchester, New York NEC: 2014
- Location
- Hawthorne, New York NEC: 2014
- Occupation
- EC
With metal studs you run the cables through the punched openings which are large enough to allow the cable to move out of the way of a nail or screw.
-Hal
- Location
- New Jersey
- Occupation
- Journeyman Electrician
With metal studs and MC cable no protection is required when running through holes in the studs even if the stud holes are less than 1.25" from the edge. 1 5/8" studs are used all of the time with MC cable through the holes in the studs and no protection.
I would also add that nail plates are not required for EMT through studs.
Jerramundi
Senior Member
- Location
- Chicago
- Occupation
- Licensed Residential Electrician
Eh, I don't know about that one. I think your conclusion here ignores the reality of a grey area between two absolutes. It's a scale.
It's definitely possible to drive a screw into EMT, or a nail from a nail gun, but THE SAME AS NM!? No way.
Jerramundi
Senior Member
- Location
- Chicago
- Occupation
- Licensed Residential Electrician
You sure? I thought they were if it's a certain distance from the edge?
It's definitely required if you notch. That I'm near certain of.
I do nail plates on my EMT anyway. It's cheap and prevents you from having to open a wall up again and fix something the drywallers messed up.
But I feel like there is a code requirement here.
Fred B
Senior Member
- Location
- Upstate, NY
- Occupation
- Electrician
You can't prove that by me, lol.
I have a guy that does some framing and sheet rock for me, he can hit it, not only hit it but drive right into it. He hit free floating mc in a wall space that lower studs didn't aline with upper studs, mc floating across a 16" space, hit it dead center of space and of the mc, right into a spiral groove driving screw in and blowing the breaker. I too always thought the cables would just move. That became a 2 junction box repair.
Jerramundi
Senior Member
- Location
- Chicago
- Occupation
- Licensed Residential Electrician
If it's not an NEC requirement, then it's either another building code issue like IRC or a local amendment. I know I got it from somewhere and didn't just invent it. I was introduced to nail plates long before I ever installed my first NM. So I know I'm not conflating NM requirements with EMT.
- Status