tonype
Senior Member
- Location
- New Jersey
Minimum NM sheathing length at panelbox connections
- Thread starter tonype
- Start date
- Status
- Occupation
- Licensed Electrician
You are right, it doesn't, but I'd be more interested in how the sheathing looks on the other side of the connector where the clamp is. If that looks okay I don't think I would worry about it.
peter d
Senior Member
- Location
- New England
I don't see anything there that concerns me in the least.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
What code section requires the 1/4" of cable sheathing when entering a panel with that type of conductor?
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Without looking, I believe the 1/4 inside the box rule mostly applies to your typical non metallic wall boxes - especially where a clamp is not needed, clamp fittings need to clamp the sheath but the sheath can and immediately after the clamp.
Some fittings could have a requirement in their instructions - more likely to apply to the "black button" fitting shown in the OP then the "two screw clamp" fittings.
Some fittings could have a requirement in their instructions - more likely to apply to the "black button" fitting shown in the OP then the "two screw clamp" fittings.
luckylerado
Senior Member
- Location
- Lake of the Ozarks
Looks like 200.4(B) would apply.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
I would have to agree that if the cable sheath were to extend far enough to clearly be able to see which white goes with which black that it makes compliance with 200.4(B) easier.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Good point, in this case you could use another method besides the sheath extending into the enclosure.
It is not all that uncommon to have a little slack in the NM before it enters the box.
Just loosen the connector, grasp the NM and slide it just enough through the connector to assure that the connector clamps any the sheath.
Isn't the clamp of the connector on the end of the connector away from the box? Is the clamp tightening directly on the sheath? Probably so. Where the wires exit the connector into the box the connectors purposefully have no sharp edges the damage the wire insulation where the wire must be protected by try he sheath. If so is there any issue?
- Status