137 Chapter Outline 10.1 Electrical Metallic Tubing 10.1.1 Cutting Conduit 10.1.2 Reaming Conduit 10.1.3 Bending Metallic Conduit 10.2 Electrical Nonmetallic Tubing 10.3 Rigid Metal Conduit 10.4 Intermediate Metal Conduit 10.5 Rigid PVC Conduit 10.6 Flexible Metal Conduit (Greenfield)fi 10.7 Liquidtight Flexible Metal Conduit 10.8 Surface-Mount Raceways Objectives Information in this chapter will enable you to: • Become familiar with the many different types of raceway systems. • Understand the distinct uses of different types of raceways, based on the NEC. • Cut, prepare, and join various types of raceway materials. • Practice essential conduit bending techniques. CHAPTER 10 Raceway Systems Technical Terms back-to-back bend box offset conduit electrical metallic tubing (EMT) electrical nonmetallic tubing (ENT) field bend flexible metal conduit (FMC) Greenfield intermediate metal conduit (IMC) liquidtight flexible metal conduit (LFMC) offset bend raceway rigid metal conduit (RMC) rigid polyvinyl chloride conduit (PVC) saddle bend shrink stub bend surface-mount raceway Amaterials rticle 100 of the NEC defines C a fi raceway as y an enclosed channel of metallic or nonmetallic designed expressly for holding wires, cables, or busbars. Raceway systems consist of con- duit, boxes, fi ttings, and connectors. fi fi Conduit is t the tubing or channel that is used to connect the boxes together. The wires are pulled from box to box through the conduit. Boxes can be used either for junctions (for connecting wires together) or for mounting devices, such as lamp fixtures, switches, fi and outlet receptacles. Fittings are used to connect sections of conduit together, and connectors are used to connect the conduit to the boxes. Remember that conduit differs from cable in that conduit is hollow tubing through which you pull individual wires during an installa- tion. Cable is one or more wires enclosed in a protective sheathing or armor, and it typically is not installed inside conduit. 10.1 Electrical Metallic Tubing Electrical metallic tubing (EMT) is rigid metal conduit typically made of galvanized steel. It has a relatively thin wall, giving it the common Copyright Goodheart-Willcox Co., Inc.