PVC Electrical Conduit
There is always an advantage to using electrical conduit to run wires or cables, easy repair, replacement or upgrade.
Figure 1 - PVC conduit cutter
Figure 2 - PVC conduit |
PVC electrical conduit is an easy product to work with. A hacksaw, or a conduit cutter, as shown in Figure 1, if you are planning on doing a lot of conduit work, and a tape measure are the only tools required.
PVC electrical conduit comes in a host of sizes from 1/2 inch to 6 inches and in two strengths, schedule 40 and schedule 80.
- Schedule 40 should be fine in most residential applications.
- Schedule 80 has a thicker wall than schedule 40 and is designed for rough environments.
PVC conduit is designed with a female fitting at one end, as shown in Figure 2, hence, a coupling is not needed when joining full lengths of pipe together.
Figure 3 - PVC conduit accessories and fittings |
There are numerous fittings available, as shown in Figure 4.
For outdoor work bonding sections using adhesive and pipe cleaner is recommended.
For indoor applications you can use male and female box connectors.
Remember that PVC pipe does not provide a ground connection as does EMT metal piping.
Chart 1 provides a picture and function of the most common PVC conduit fittings and accessories.
| Chart 1 - The Most Common PVC Conduit Fittings & Accessories. | ||
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45 Degree Sweep Sweeps provide the ability to conveniently pull or feed cable, because they are not sharp bends, Sweeps come in five angles - 11.25, 27.5, 30, 45 and 90 degrees |
"T" Fitting Used to allow the splitting of wire runs. |
In-line Conduit Entry This fitting provides convenient access for pulling or feeding wires and cables in a long conduit run. |
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Conduit Bushing This is the locknut for any male threaded fitting. |
Conduit Coupling Joins two pieces of conduit pipe together. |
Electrical Box Electrical boxes are available with 1. 2, 3, and 4 pipe entry points. |
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Conduit Expansion Joint Allows conduit to contract and expand without damaging the conduit. |
Female Fitting Allows for the connection to metal pipe and other accessories with male connections. |
Conduit Offsets When entering or exiting an electrical box with conduit that is fastened to the same surface as the electrical box, it is necessary to bring the conduit out in order to meet with the box fittings. |
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LB Fitting The LB fitting allows for a tight 90 degree conduit routing. It allows for entry for pulling and feeding wires. |
Round Junction Box Can be used for electrical lights and other items that require a round electrical box. |
Male Fitting Used to join female accessories and in conjunction with the conduit bushing. |
Typical use of PVC conduit in a residential application is for underground wiring, as shown in Figures 4 and 5.
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Figures 4 and 5 - Using PVC conduit in an underground application