Greg there
are two types of these.
One type is as you describe, simply male and female 'plugs' that connect two separate NMs together.
I agree that type is not allowed in stick built homes.
But there is another type that Molex makes that is a tap.
It is made to tap a new NM in the middle of an exsisting run run of NM, this type is allowed in stick built homes.
If that is not the case can you tell me what type of device the NEC is referring to here?
part of 334.40(B)
tap devices of insulating material shall be permitted to be used without boxes in exposed cable wiring and for rewiring in existing buildings where the cable is concealed and fished.
The tap devices are permitted.
Bob
