Fasten NM cable

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jetlag

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Eatonton, Georgia
I cant find it now , but wasn't there an exception about NM has to fastened within 12 " of a box clamp when the cables enter a panel box through drilled plates not over 4.5 ft above or below the panel ? In other words if all the cables cant be fastened to a stud do you have to put a cross piece between the studs 12" from panel to fasten the NM ? Also I got flagged for not having a staple within 8" of where a cable comes through a plate and is stapled to a stud . I allways put a staple in that general area but never worried about the exact 8" . I cant find that in code either . If that is true will I also have to put a cross piece 8" from the plates where the panel is ? I usually put the cross piece 12'' from panel but I just thought I remembered an exception.
 
334.30 Securing and Supporting.
Nonmetallic-sheathed cable shall be supported and secured by staples, cable ties, straps, hangers, or similar fittings designed and installed so as not to damage the cable, at intervals not exceeding 1.4 m (4? ft) and within 300 mm (12 in.) of every outlet box, junction box, cabinet, or fitting. Flat cables shall not be stapled on edge.
Sections of cable protected from physical damage by raceway shall not be required to be secured within the raceway.

314.17(C)
Exception: Where nonmetallic-sheathed cable or multiconductor Type UF cable is used with single gang boxes not larger than a nominal size 57 mm ? 100 mm (2? in. ? 4 in.) mounted in walls or ceilings, and where the cable is fastened within 200 mm (8 in.) of the box measured along the sheath and where the sheath extends through a cable knockout not less than 6 mm (? in.), securing the cable to the box shall not be required. Multiple cable entries shall be permitted in a single cable knockout opening.
 
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augie47 said:
334.30 Securing and Supporting.
Nonmetallic-sheathed cable shall be supported and secured by staples, cable ties, straps, hangers, or similar fittings designed and installed so as not to damage the cable, at intervals not exceeding 1.4 m (4? ft) and within 300 mm (12 in.) of every outlet box, junction box, cabinet, or fitting. Flat cables shall not be stapled on edge.
Sections of cable protected from physical damage by raceway shall not be required to be secured within the raceway.

314.17(C)
Exception: Where nonmetallic-sheathed cable or multiconductor Type UF cable is used with single gang boxes not larger than a nominal size 57 mm ? 100 mm (2? in. ? 4 in.) mounted in walls or ceilings, and where the cable is fastened within 200 mm (8 in.) of the box measured along the sheath and where the sheath extends through a cable knockout not less than 6 mm (? in.), securing the cable to the box shall not be required. Multiple cable entries shall be permitted in a single cable knockout opening.
Click to expand...

Thanks Augie , those are the only codes I know of also. It had to be in an older code , I think it was like a panel within 24 '' of plate was exempt from the 12" fasten. Do oyu know where the AHJ got the idea about staple 8'' from plate . He said you must have staple within 8'' from plastic box (which was a little of an insult for him to say ) but also said and 8'' from where cable comes through plate . :-?
 
Jet- many one gang boxes do not have a means to hold the nm in place. If the cable is attached to a single gang box then a staple is need within a foot , if not secured to the box then it must be within 8".
 
jetlag,
I don't know that the 4-1/2 ft from the panel was ever "Code approved" , but I see it installed that way often enough that I suspect that it has been "accepted" in many areas even if not to Code.
It is so common in this area that I have found myself not enforcing the '12" rule' at the panel (I'm getting lax in my old age)
 
I was trying to find late last night (and failed epically) the rule that allows you to run a conduit out of the panel and run all the NM through the pipe. As long as you met a list of conditions, like the conduit not going through the cieling, and being no longer then xx"
 
acrwc10 said:
i was trying to find late last night (and failed epically) the rule that allows you to run a conduit out of the panel and run all the nm through the pipe. As long as you met a list of conditions, like the conduit not going through the cieling, and being no longer then xx"
Click to expand...


fyi 312.5(c)
 
thanks dennis

thanks dennis

Dennis Alwon said:
Jet- many one gang boxes do not have a means to hold the nm in place. If the cable is attached to a single gang box then a staple is need within a foot , if not secured to the box then it must be within 8".
Click to expand...

I know , I usually go with the 8" anyway , on a multigang gang by the time the cable goes across the box to last clamp it is close to 12 '' anyway . The AHJ was saying a staple also had to be within 8" of where the cable comes through a hole in a plate on the inside of the stud cavity . I never heard of that one before :grin:
 
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