October 2013
Intermediate to advanced
192 pages
8h 30m
English
Content preview from Electric Wiring, 3rd Edition
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11 2 Survey of modern wiring systems
lengths in excess of
5.5-6.5
m. The saddles which are used to support PVC
conduit should also allow lateral movement.
For details of installation methods see Chapter 8.
All-insulated sheathed wiring systems
One type of cable is used in all-insulated systems: PVC (polyvinylchloride)
insulated and sheathed cable; it is manufactured as single-core (known as
"singles'), two-core (known as 'twin'), and two-core with a bare protective
conductor between them (known as 'twin-and-earthf). A three-core cable is
also available which has three insulated cores within the sheathing.
Sheathed wiring cables are used fo
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