Armored Cable & 7' rule
- Thread starter Ponchik
- Start date
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jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Are you talking about open roof trusses in a garage?
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
I was asking where you are running the wire.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
I believe that additional protection would be required for AC running parallel down the side of a 2x4 stud in a garage.
Is an open [unfinished] wall an attic or roof space?
Hmmm... I have to say: No, it does not apply. :slaphead:
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
this should have said
I believe that additional protection would not be required for AC running parallel down the side of a 2x4 stud in a garage.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
residential garage?
yes.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
I believe that SF does not allow NM unprotected below 7 or 8 feet. I have a link to their amendments somewhere if you need it.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Here it is:
Subject to Physical Damage. Wiring installed
within 2.44 m (8 feet) of a walking surface or
finished floor is considered subject to physical
damage.
http://www.archive.org/stream/gov.ca.sf.electrical/ca_sf_electrical_djvu.txt
Subject to Physical Damage. Wiring installed
within 2.44 m (8 feet) of a walking surface or
finished floor is considered subject to physical
damage.
http://www.archive.org/stream/gov.ca.sf.electrical/ca_sf_electrical_djvu.txt
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
No, it is then up to the AHJ to determine "subject to physical damage". It becomes more subjective.
334.15(B) Protection from Physical Damage. Cable shall be
protected from physical damage where necessary by rigid
metal conduit, intermediate metal conduit, electrical metallic
tubing, Schedule 80 PVC conduit, or other approved
means. Where passing through a floor, the cable shall be
enclosed in rigid metal conduit, intermediate metal conduit,
electrical metallic tubing, Schedule 80 PVC conduit, or
other approved means extending at least 150 mm (6 in.)
above the floor.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
In my opinion BX, MC or NM does not need extra protection when run parallel with the studs. The article that Jumper mentioned is when NM cable passes thru a floor exposed on a wall. That is different then being in a wall nailed to a stud. It is more protected inside the stud cavity.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Dennis that section is not only for cables passing through a floor.
The first part basically says : It is up to the AHJ to decide when additional protection is required.
I agree that cables stapled down the stud are fine, but an AHJ could say otherwise under this section.
The first part basically says : It is up to the AHJ to decide when additional protection is required.
I agree that cables stapled down the stud are fine, but an AHJ could say otherwise under this section.
I agree. Run inside the stud bay and you're fine. 6' or less from an attic access needs a running board. 1 1/4" from face of stud, as if the garage were to be rocked. 334.10,A,1
but! I always think gas cans, mowers, car gas tanks... etc. - would bring in 334.12,B,1. The customers always stockpile mowers and gas cans in front of the panel!
Just don't run NM on the face of any framing member at any height were it can be rocked in the future (unless T-bar ceiling is to be installed in the dwelling 334.12,A,2).
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
2011 fixed that:
334.10 Uses Permitted. Type NM, Type NMC, and Type
NMS cables shall be permitted to be used in the following:
(1) One- and two-family dwellings and their attached or
detached garages, and their storage buildings.
- Status