What are the requirements for clips for fixed AC single-core cables?

Update:30-09-2018
Summary:

What are the requirements for clips for fixed AC single […]

What are the requirements for clips for fixed AC single-core cables? why?

Answer: The clamp should be free of iron to form a closed magnetic circuit. This is because when the cable core passes current, magnetic flux is generated around it. The magnetic flux is proportional to the current passing through the core. If a magnetic material such as iron is used, according to Electromagnetic induction knows that eddy currents will be generated in the iron parts to heat the cable and even burn the cable. Therefore, iron parts cannot be used as fixing fixtures for single-core AC cables.

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