Re: MC cable - Can we use it in Plenum
Sure it does, take a look at 300.22
Originally posted by twada:
Is MC cable plenum rated or can be used in plenum? Our contractor said that he use in the plenum space all the time, but I am not sure... NEC doesn't state whether it can be used in the plenum or not......
Also make sure your taking about a 'true' plenum, the space above a suspended ceiling used for the return air is not considered by the NEC to be a plenum. The NEC considers this space "Other Space Used for Environmental Air". ( 300.22(C) )
That said MC is allowed in 'Other Space Used for Environmental Air and directly inside duct work. ( 300.22(B) )
Most systems work best if they are kept simple rather than made complicated; therefore simplicity should be a key goal in design and unnecessary complexity should be avoided.