This chapter focuses on the common conditions of proper cabling and alignment of conductors. Once the conductors are selected, they must be protected from physical damage through the use of an enclosed conduit. Depending on the application the material used for the conduit can be rigid steel, electrical metallic tubing, flexible metal or polyvinyl chloride. For metallic materials, the conduit often serves as the equipment ground. The size of a conduit depends on the allowable percent fill of the conduit area. Frequently the electrical engineer is faced with the problem of sizing a conduit for both power and control wires. At the beginning of each project a table should be established summarizing all conduit, cable, fuse and switch or breaker sizes for each motor horsepower. Each motor and its associated auxiliaries can be determined at a glance. On a large project this type of table saves a considerable amount of time.