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Is this a legal requirement in the UK? If it's an EU directive, the French ignore it,
I'm not sure of the exact details of the Health & Safety at Work Act, but this is one case where it's not an EU rule. The U.K. was using 110V site tools years before we even joined what was then the EEC.

We've had some discussions about 110V site tools before, such as this thread .

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It's interesting that hse allow 240v but are consficating pull-over mitre saws from work places.

I'm not quite sure what type of miter saw that is, but who exactly gave the HSE any authority to confiscate anything? (Not meaning to go off topic -- Maybe this is a subject for a thread in non-U.K.).