158 Section 3 Installation Copyright Goodheart-Willcox Co., Inc. Summary • Raceways are complete systems for enclosing and protecting wiring. They include conduit or tubing, boxes, and fi ttings. • Types of rigid conduit and tubing include EMT, IMC, RMC, and rigid PVC. Flexible raceway materials include ENT, FMC, and LFMC. • RMC, IMC, and PVC conduit can be used interchangeably in many applications, but PVC cannot be used to support fi xtures. • Most conduit and tubing can be custom- bent on the jobsite or can be installed with prefabricated bends and other fi ttings for routing. • The NEC has specifi c requirements for raceway applications and installation, including maximum mounting distances, suitable locations, and preparation procedures. Internet Resources The following companies provide additional information related to the topics in this chapter. Use a search engine to fi nd the company’s home page and explore the resources available on the website. Wireman. Retailer of specialty electrician tools. Website includes a regularly updated apps section that lists popular apps for conduit bending and other reference tools for electricians. Ideal Industries. Manufacturer of electrical tools and supplies. Website features an illustrated Bender Guide covering the basics of conduit bending. The “Product Videos” page has several detailed videos on conduit bending calculation and technique. Rigid. Manufacturer of pipe vises and cutting and threading tools useful for working with metal conduit. Know and Understand Answer the following questions using the informa- tion provided in this chapter. 1. True or False? Electrical metallic tubing cannot be used as an equipment ground. 2. A _____ bend is used when the conduit has to turn 90°. A. fi eld B. saddle C. stub D. box 3. True or False? When wiring with rigid metal conduit, a grounding conductor is required. 4. What conduit is also known as “heavy- wall conduit”? A. Greenfi eld B. Flexible metal conduit C. Rigid metal conduit D. Rigid PVC conduit 5. Intermediate metal conduit is commonly sold in which of the following lengths? A. 3′ B. 6′ C. 8′ D. 10′ 6. True or False? PVC conduit can be direct buried. 7. PVC conduit bends are made by fi rst _____ the conduit. A. cooling B. heating C. icing D. straightening 8. Flexible metal conduit must be supported within _____″ of a box and every _____′ thereafter. A. 12, 4 1/2 B. 4 1/2, 12 C. 3, 10 D. 3, 3 9. True or False? Surface-mount raceways are allowed in both dry and damp locations.