Edited in recognition of post 12.Can an NM-B (AWG 6 cu 3 w.AWG 10 ground) wire be installed on the bottoms of floor joists above the unfinished basement traversing the joist spaces?
Can the routing be at an angle (not perpendicular) to the joists so the contact points are greater than 16".
What is the fastening spacing requirement?
That's a pretty stiff and long snake to be wrestling with for what may be an 80 foot run so that would be a pretty tough undertaking.Do you not want to drill holes in the joists? That is what I have done in joists when wiring my house. I just make sure to stay the required distance from the edges of the joists.
What do you mean "run on top with rat runners"?no.
either drill holes thru the joists or run on top with rat runners.
You could get more informed answers from the forum if you describe the whole project. Yes it can be spliced. But maybe there is a clean solution without splices.Is there a different requirement for heavy wires like the 6-3+ wires of interest?
Retrofit upgrade wire from main panel in the existing basement (under floor above) to a secondary panel at an addition.You could get more informed answers from the forum if you describe the whole project. Yes it can be spliced. But maybe there is a clean solution without splices.
3 splice options come to mind. Wire nuts, split bolts and Polaris connectors.Retrofit upgrade wire from main panel in the existing basement to a secondary panel at an addition.
Splice is definitely needed for materials on hand.
I looked a bit at Polaris connectors. Would that require three separate connectors, one for each power line, or four to include the ground?3 splice options come to mind. Wire nuts, split bolts and Polaris connectors.
3 Polaris and 1 wire nut would work. Ground is 10 ga.I looked a bit at Polaris connectors. Would that require three separate connectors, one for each power line, or four to include the ground?
What do you mean "run on top with rat runners"?
I am not understanding but do you mean run support boards at bottoms of joists and wire under those?
Is there a different requirement for heavy wires like the 6-3+ wires of interest?
There is confusion in the "rat runners" description given but the Code reference section diagram shows what I understand."rat runners" aka running boards are strips of wood run along the top of joists that you staple the NM-b on top of. they go on top of the joist not underneath for small conductor cables smaller than what is listed below.
NEC code 334.15(c) allows cables larger than 2 #6 or 3 #8 to be ran on the underside of the joist
Also helpful.Since your cable is larger than 2 #6 or 3 #8 it can be run on the underside of the joists w/o runner boards or adjacent nailers. Must be secured at intervals no more than 4.5' and no more than 12" at box entries. I would go tighter than 4.5', maybe every other joist. It depends how well it follows the joist contour......could be every joist to be neat.
Do those need to be in a box?3 Polaris and 1 wire nut would work. Ground is 10 ga.
Yes. Securely mounted with proper cable clamps in and out.Do those need to be in a box?
Are the black Polaris connectors appropriate with stranded wire?Yes. Securely mounted with proper cable clamps in and out.
Yes, for the stranded that is in wire like NM-B. It's not appropriate for finely stranded, like flexible cord age and welding cableAre the black Polaris connectors appropriate with stranded wire?
Some terminology confusion here, OP is talking about wire being under "Floor" joists. "Rat Runners" as you pointed out go on top of joists, specifically "ceiling" joists. So one is under the floor and the other is above the ceiling. In anycase, it appears code has him covered in this application with no additional support structure required."rat runners" aka running boards are strips of wood run along the top of joists that you staple the NM-b on top of. they go on top of the joist not underneath for small conductor cables smaller than what is listed below.