Is the A-Frame applicable if the faulted cable is inside a non-metallic duct?

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In theory, the A-Frame is not applicable if the cable is inside a non-metallic duct. However, in practice, if the cable developed a fault it is probably related to some damage that occurred to the duct work which in turn damaged the cable inside. In this case, the damage to the duct created a “path to ground” which is what the A-Frame is designed to accurately pinpoint. It does not hurt to try it.

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