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This study book gives students a background to the use of cables and enclosed cable systems. It not only looks at the cables in use but also at what should be considered when selecting cables for an application. Students are given methods for carrying out the basic calculations necessary to select the correct cable ratings for the given situations. Other topics in the book include: Steel conduit, PVC conduit, Trunking and cable tray, Fixing, mechanical protection and the installation of cables.