Discussion
The maximum length of the flexible conduit in motor installation should be less than _____.
Answer: D
The key gives 1.25 m as the length under which flexible conduit in a motor installation should be kept. Flexible conduit is used for the short connection between a rigid conduit run and a motor, which can move or vibrate, and it is kept short for mechanical protection and for earth continuity.
I could not check the figure in the wiring code, so the answer follows the key. The values of 10 m, 5 m and 2.5 m are longer than a flexible conduit should be. The fourth option is the one given.
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