I am adding about 5 new feeds on level 1 of a 2-story residence. The inspector is calling for AFCI breakers, but was not clear about why. I have GFI outlets in kitchen, bathrooms, garage. I need to understand the AFCI requirement for 2010 construction so I can develop a plan and minimize work. Further, the inspector told me to remove a 6/4 type TW for a 50 amp range and install a 8/4 NM? I don't think so. Does TW require a conduit within a building or can it be stapled to beams and meet code? If a starter control for a pump is 60' away from the point where the TW enters the building, how is the TW cable installed as per code? Sleeved in conduit or stapled, or none of the above? Can UF be used inside just as NM?

AFCI breakers are needed everywhere but kitchens, bathrooms, garages and unfinished basements.

#8 NM is only good for 40 amps, so the inspector is incorrect. A 50 amp circuit needs #6 NM cable.

When you say TW for the pump, do you mean the pump wiring that is individual but twisted cable?

Quote:

---

Originally Posted by tkrussell

AFCI breakers are needed everywhere but kitchens, bathrooms, garages and unfinished basements.

#8 NM is only good for 40 amps, so the inspector is incorrect. a 50 amp circuit needs #6 NM cable.

When you say TW for the pump, do you mean the pump wiring that is individual but twisted cable?

---

Yes, the TW is individual cables twisted to form the cable. The insulation is thicker than NM. I am wondering why the inspector has said that this can't be used inside. If this is true, then NM would have to be used outside to make the connection, but that is as illogical as it gets. Therefore I am trying to get info on how TW can be used inside, stapled to beams or conduit required.