Electrical 1: Cable Tray

Describe the sections used in cable tray assembly. Describe the National Electrical Code (NEC) requirements for cable tray construction. Select the proper cable tray sections for specific applications. Identify cable tray sections on working drawings. Describe the effects of improper tray loading. Describe the connectors barrier strips and covers used in cable tray assemblies. Select the proper cable tray fittings for the situation. Identify cable tray fittings on working drawings. Describe the splice plates used in cable tray assembly. Select the proper cable tray fittings for the situations. Explain the methods used to hang and secure cable tray. Describe where splices in straight tray sections should be located. Describe a method used to fabricate an offset in cable tray. Describe the NEC requirements for cable tray installation and grounding. Select the required fittings to ensure equipment-grounding continuity in cable tray systems. Size cable tray for the number and types of conductors contained in the system. Describe the NEC requirements for cable tray conductors. Describe the general requirements for pulling cable in tray systems. Describe how cable is supported in vertical tray. Describe how cable exits cable tray.