Guide to Connecting Plastic Electrical Conduit


Connecting plastic electrical conduit together is an easy process. Threaded hubs connect plastic conduit to panel boxes, outlet boxes, device boxes, or junction boxes, but the hubs connect to the plastic conduit the same way couplings connect to the plastic conduit when connecting two or more lengths of plastic conduit together. Plastic electrical conduit is the easiest conduit to work with even for the beginner.

Things You'll Need

  • PVC pipe cutter
  • PVC pipe cleaner/primer
  • PVC pipe adhesive/cement
  • PVC electrical conduit
  • PVC appropriate pipe fittings (i.e., couplings, threaded hubs, factory 90s, Lbs)
  • Cut the plastic electrical conduit to length using a PVC tubing cutter. The ideal tool for cutting plastic conduit is a PVC tubing cutter because it makes a perfectly square cut. A square cut is required for the proper joining of joints (pieces) of plastic conduit together and for joining plastic conduit to plastic conduit fittings.

  • Coat the outside of the plastic electrical conduit, and the inside of the conduit fittings, with a generous coating of the PVC cleaner/primer. Measure the depth of the conduit fitting. Measure this distance plus 1 inch back from the end of the plastic conduit and then coat that area with a generous coating of PVC cleaner/primer.

  • Apply a generous coating of the PVC cement to the outside of the plastic electrical conduit as you did the cleaner/primer. Make sure you apply the PVC cement before the PVC cleaner/primer dries. Coat the inside of the plastic conduit fitting with PVC cement and then slip the fitting over the conduit. Push the fitting on the conduit until the edge of the conduit open end butts against the center strip of a coupling or the inner flange of a threaded hub or other fitting. Twist the fitting through 180 degrees several times and then set it aside for 15 minutes to dry.

  • Apply a generous coating of PVC around the conduit where the fittings end after you have connected all the joints of plastic electric conduit and fittings together in this manner. This extra step ensures a watertight connection, which is essential if the plastic electrical conduit is to be installed outdoors or underground.

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