Approved NM Cable Fasteners

[jar546]

334.30 Securing and Supporting.
Nonmetallic-sheathed cable shall be supported and secured by staples, cable ties listed and identified for securement and support, or straps, hangers, or similar fittings designed and installed so as not to damage the cable, at intervals not exceeding 1.4 m (41⁄2 ft) and within 300 mm (12 in.) of every cable entry into enclosures such as outlet boxes, junction boxes, cabinets, or fittings. The cable length between the cable entry and the closest cable support shall not exceed 450 mm (18 in.). 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.

Is this an approved method in your jurisdiction?

 

[e hilton]

Doesn’t meet the definition of “designed for”.

Question about some criteria. Seems like this is contradictory. What am i missing, or misreading?

within 300 mm (12 in.) of every cable entry …. cable length between the cable entry and the closest cable support shall not exceed 450 mm (18 in.)

 

[ICE]

Doesn’t meet the definition of “designed for”.

Tell that to the ??? that did it. He/she/they will most assuredly take credit for the "design".

Just say no.

 

[jar546]

Doesn’t meet the definition of “designed for”.

Designed by the electrician, therefore compliant. This is fastened into concrete block.

 

[ICE]

Designed by the electrician, therefore compliant.

That opens the door to all sorts of repurposed trash being used where it shouldn't be used. It appears to be a concrete nail and that alone would be suspect. Had it been a redhead with the sheath centered on the screw...well then I would be saying no to a much improved version of recycled trash.

Any method should have some reliance on repetitive application. Using Romex sheath and a concrete nail is hardly that....with the end result being mashed fingers.

 

[jar546]

with the end result being mashed fingers.

No one uses a hammer to put them in. 1970 was a long time ago.

 

[wwhitney]

Question about some criteria. Seems like this is contradictory. What am i missing, or misreading?

One limit refers to the distance in space between the cable entry and cable support. The other limit refers to the distance as measured along the cable.

Cheers, Wayne

 

[e hilton]

One limit refers to the distance in space between the cable entry and cable support. The other limit refers to the distance as measured along the cable.

Cheers, Wayne

So not more than 6” of loose cable in the box?

 

[wwhitney]

So not more than 6” of loose cable in the box?

No, the rules just concern cable outside the box.

The point of the rule referencing 18" is to rule out taking, say 24" of cable, rolling it into a loop or two, and stapling the loop within 12" from the box.

Cheers, Wayne

 

[steveray]

Doesn't really look like it is pinching the cable...Maybe....Lets face it, it is only holding the cable until the wallboard goes on and then all NM bets are off....