Discussion
The cheap & temporary system of internal wiring is:
Answer: B
The cheap and temporary system is cleat wiring.
In cleat wiring, PVC or VIR insulated wires are held on the wall or ceiling by porcelain or plastic cleats screwed at intervals. It is quick to put up and take down and needs very little material, which makes it suitable for temporary installations such as at functions, construction sites and exhibitions. It is not protected from mechanical damage or weather and looks untidy, so it is not used for permanent work.
Conduit wiring is the most durable and expensive system, CTS (TRS) wiring is a cheap permanent system for houses, and casing-capping wiring encloses the wires in wooden or PVC channels for permanent use.
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