What are the different types of conduit fittings?

Generally ,the PVC elctrical Conduit fitting is metal or plastic tubing used to create a protective channel for electrical wire. The channel, along with electrical boxes and devices that join the conduit pieces, is known collectively as raceway.

 In a household wiring system, most of the circuit wiring is in the form of insulated cable that is run inside wall, floor and ceiling structures without conduit. Conduit typically is used only where circuit wires are exposed (or surface-mounted or buried) and therefore need protection from damage or moisture.