PVC 2" Conduit Lock Nut. PVC is typically used in above and below ground DWV (Drain, Waste, Vent) Applications. This Grey PVC is generally used for both commercial and residential electrical applications. Electrical PVC is also durable corrosion resistant, its ideal for protecting your homes power supply. Because PVC is fairly rigid, PVC pipe is an excellent pipe choice for just about any application in the electrician catagory. This PVC 2" Conduit Lock Nut is designed for electrical applications. This Lock Nut allows you to connect conduit to plastic electrical boxes.