Strapped To The Bottom Of Exposed Floor Joists Conductors

It s also cheaper that way but that s not what you re asking.

Strapped to the bottom of exposed floor joists conductors. 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. Exposed runs of cable except as provided in 300 11 a shall closely follow the surface of the building finish or running boards. 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.

In the unfinished basement an nm cable containing conductors smaller than two no. Tho i wouldn t do that at the bottom chord of an a w out an engineer s approval. 8 conductors must be installed through bored holes in the framing members. Wires to the bottom of a floor joist unless the wire is 6 2.

Avoid unnecessary moisture exposure of all wood components by enclosing the frame against adverse weather as soon as feasible. 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. 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.

Like all wood materials i joists are susceptible to moisture. C in unfinished basements and crawl spaces. 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.

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. The insulated conductors under the metallic covering are listed for use in wet locations. 6 awg or three no. 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.

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. He didnt say anything about the exposed wiring that was stapled to the bottom of the joists had to be in conduit.