Exposed wiring on bottom of joists.
Strapped to the bottom of exposed floor joists conductors.
Avoid unnecessary moisture exposure of all wood components by enclosing the frame against adverse weather as soon as feasible.
Where cable is run at angles with joists in unfinished basements and crawl spaces it shall be permissible to secure cables not smaller than two 6 awg or three 8 awg conductors directly to the lower edges of the joists.
Wires to the bottom of a floor joist unless the wire is 6 2.
Exposed to cinder fills strong chlorides caustic alkalis or vapors of chlorine or of hydrochloric acids.
Joists secured at the outside ends and lapped over the beam would provide better resistance to tension than jhs.
Exposed runs shall also be permitted to be installed on the underside of joists where supported at each joist and located so as not to be subject to physical damage.
In the unfinished basement an nm cable containing conductors smaller than two no.
Type mc cable installed on the bottom of floor or ceiling joists must be secured at every joist and not be subject to physical damage.
It s also cheaper that way but that s not what you re asking.
If an exposed conductor of a low voltage wire comes in contact with 120v the higher voltage can damage what ever is at the end of the low voltage wire.
A solid connection between the exposed low voltage wire and a 120v wire also can cause the insulation to melt and start a fire.
Walking on joists before all accessories and floor decking are installed i joists are unstable and can roll over if walked on leading to injuries.
Where cable is run at angles with joists in unfinished basements and crawl spaces it shall be permissible to secure cables not smaller than two 6 awg or three 8 awg conductors directly to the lower edges of the joists.
Installing nm cable exposed in the basement of a structure is so common that section 336 6 c provides guidance on the installation of the cables in a basement.
He didnt say anything about the exposed wiring that was stapled to the bottom of the joists had to be in conduit.
Where the cable is run at angles with joists in unfinished basements cable assemblies containing two or more conductors of sizes 6 awg and larger and assemblies containing three or more conductors of sizes 8 awg and larger shall not require additional protection where attached directly to the bottom of the joists.
334 15 exposed work c in unfinished basements and crawl spaces.
Like all wood materials i joists are susceptible to moisture.
I am selling my house and the home inspector said that the basement surfaced mounted receptacles needed to be in conduit because the wires were exposed.
6 awg or three no.
Tho i wouldn t do that at the bottom chord of an a w out an engineer s approval.
Exposed runs of cable except as provided in 300 11 a shall closely follow the surface of the building finish or running boards.
