7100 sq foot house

Status
Not open for further replies.
P

Pjm 63

Member
All,

Im looking at a remodel in a 7100 sq foot house. I noticed when I did a job walkthrough all of the existing wiring was done in commercial grade material( flex, mc cable, EMT). I was planning on bidding this job in romex and was wondering if there is a code that states after a certain square foot you have to change to commercial grade material. Has anyone herd or this? thanks in advance
 
Pjm 63 said:
All,

Im looking at a remodel in a 7100 sq foot house. I noticed when I did a job walkthrough all of the existing wiring was done in commercial grade material( flex, mc cable, EMT). I was planning on bidding this job in romex and was wondering if there is a code that states after a certain square foot you have to change to commercial grade material. Has anyone herd or this? thanks in advance
Click to expand...

No. Not the NEC. Maybe a local code? May have just hired a commercial guy to do the rough in. I work with some guys that would use EMT in their home which makes no sense to me.
 
They may want the method to match the existing.
If you bid NM and get the job they may try to make you use MC.

Either you need to clairify the method or qualify your method in your bid.
There may be specifications on the drawings that would tell you what method that they want.
 
Pjm 63 said:
All,

Im looking at a remodel in a 7100 sq foot house. I noticed when I did a job walkthrough all of the existing wiring was done in commercial grade material( flex, mc cable, EMT). I was planning on bidding this job in romex and was wondering if there is a code that states after a certain square foot you have to change to commercial grade material. Has anyone herd or this? thanks in advance
Click to expand...

The construction type under the building code determines what wiring method is allowed. A single family is Group R-3.

Group R-3 is allowed in Type V construction up to 3 stories.
More than 3 stories needs to be Type IV minimum.

How many stories is your building?
And who knows what article in the NEC regulates this?
 
Dennis Alwon said:
Depending on where you live you may be required to use conduit -- in Chicago homes are wired in conduit
Click to expand...

He said they were also useing MC cable so it's probably not Chicago.

I would want to clear this up with the jurisdiction where the permit is to be pulled and also the owner/contractor. There are people that used to live in the Chicago area and think that conduit is the way to go and are willing to pay for it ( but that may have been a past owner).
 
luckylerado said:
No. Not the NEC. Maybe a local code? May have just hired a commercial guy to do the rough in. I work with some guys that would use EMT in their home which makes no sense to me.
Click to expand...
I use EMT in dwellings - typically for select areas where the installation is exposed though, but not as the general wiring method for everything.
 
cowboyjwc said:
If people would just fill in the "Location" part when they sign up, it sure would make it easier to answer some of the questions we get.
Click to expand...

It should be a required field. :happyyes:
There are many time when I skip a question because it is to vague, or location specific without a location given.
 
mgookin said:
The construction type under the building code determines what wiring method is allowed. A single family is Group R-3.

Group R-3 is allowed in Type V construction up to 3 stories.
More than 3 stories needs to be Type IV minimum.

How many stories is your building?
And who knows what article in the NEC regulates this?
Click to expand...

If you are asking what article regulates construction types, it is not the NEC, but the building code.
 
Strathead said:
If you are asking what article regulates construction types, it is not the NEC, but the building code.
Click to expand...

There's an NEC article which dictates when NM can be used in a building, and it is based on construction types.

The information I cited was from the building code. I was asking who knows what article in the NEC addresses whether NM is allowed based on the type of construction.

Edit: It's Article 334.
OP is fine.
 
GoldDigger said:
BTW, the exact NEC wording is based on the required construction type (for the occupancy) not on the construction type actually used.
Click to expand...

Single family is allowed to have NM without respect to construction type (or allowed construction type).

Thanks for the clarification.
 
Status
Not open for further replies.
Top