Understanding PVC Conduit

What is the primary purpose of Rigid Non-Metallic Conduit (PVC)?

• To provide insulation for electrical wiring.

• To act as a support structure for heavy machinery.

• To protect and route electrical wiring.

• To serve as a decorative element in construction.

Describe the proper technique for cutting PVC conduit.

• Use a hammer to break the conduit

• Cut with a regular kitchen knife

• Soak the conduit in water before cutting

• Use a fine-toothed saw or PVC cutter, measure and mark the length, cut slowly, and deburr the edges.

What tools are commonly used for installing PVC conduit?

• Hammer, screwdriver, pliers

• Wrench, saw, tape measure

• Ladder, paintbrush, sandpaper

• PVC cutter, measuring tape, level, drill

How should PVC conduit be supported during installation?

• Use no support for PVC conduit as it is self-supporting.

• Support PVC conduit at intervals of 20 feet vertically and 15 feet horizontally using tape.

• Support PVC conduit at intervals not exceeding 15 feet vertically and 10 feet horizontally using nails.

• Support PVC conduit at intervals not exceeding 10 feet vertically and 5 feet horizontally using straps or clamps.

What is the maximum distance between supports for PVC conduit?

• 10 feet for vertical runs, 3 to 10 feet for horizontal runs

• 8 feet for vertical runs, 4 to 8 feet for horizontal runs

• 5 feet for vertical runs, 2 to 5 feet for horizontal runs

• 15 feet for vertical runs, 10 to 15 feet for horizontal runs

List two key material properties of PVC that make it suitable for conduit.

• Brittleness under stress

• Low tensile strength

• High thermal conductivity

• Corrosion resistance, electrical insulation

How does PVC conduit resist corrosion compared to metal conduits?

• PVC conduit is more prone to rust than metal conduits.

• Metal conduits are lighter and easier to install than PVC.

• PVC conduit resists corrosion better than metal conduits due to its non-metallic nature and resistance to moisture and chemicals.

• PVC conduit is less durable than metal conduits in harsh environments.

What is the impact of temperature on the performance of PVC conduit?

• Temperature impacts PVC conduit by affecting its flexibility and strength, with low temperatures causing brittleness and high temperatures leading to deformation.

• Low temperatures enhance the flexibility of PVC conduit.

• Higher temperatures increase the strength of PVC conduit.

• Temperature has no effect on PVC conduit performance.

What electrical safety standard must PVC conduit comply with?

• Underwriters Laboratories (UL) guidelines

• American National Standards Institute (ANSI) regulations

• National Electrical Code (NEC) standards, Article 352

• International Electrotechnical Commission (IEC) standards

Why is it important to use the correct fittings with PVC conduit?

• It is important to use the correct fittings with PVC conduit to ensure secure connections and compliance with safety standards.

• Fittings are irrelevant as PVC conduit is flexible.

• Correct fittings are only necessary for metal conduits.

• Using any fittings will suffice regardless of type.