Andy Millar:
Hey, I've just had a brilliant idea, how about if we put some non-conductive material around live conductors, we could call it something like "insulation", as a primary protection, and then in case that fails put some sort of secondary protection in such as an RCD?
I'll wait for the Nobel prize to arrive in the post...
In which case; when your 'primary protection' fails, you are therefore reliant on 'a residual current device being used as the sole means of protection against direct contact'...that doesn't work!
I think you'll find that primary and secondary 'protection' is provided by 'two layers' of insulation.
Andy Millar:
Hey, I've just had a brilliant idea, how about if we put some non-conductive material around live conductors, we could call it something like "insulation", as a primary protection, and then in case that fails put some sort of secondary protection in such as an RCD?
I'll wait for the Nobel prize to arrive in the post...
In which case; when your 'primary protection' fails, you are therefore reliant on 'a residual current device being used as the sole means of protection against direct contact'...that doesn't work!
I think you'll find that primary and secondary 'protection' is provided by 'two layers' of insulation.
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