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Big cables. 10mm twin and earth will carry 64 amps if clipped direct (not surrounded by insulation etc), which is 14kw at 230v. Plenty for a big shower etc.
I’m not sure where you are or what the nominal voltage is, but the issue is that if you get a shock between phases, you could get 400v through you, and that would be bad.
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Big cables.
Aha.
I’m not sure where you are or what the nominal voltage is
Sweden, 230V. Not totally uncommon to have 3-phase 380V outlets for heavy duty stuff in peoples garages here. I don’t have any opinions about electricity at all, just that you seemed to find the arrangements here strange/interesting. I know UK plugs have little fuses in them as well, ours don’t.
Well whaddayaknow. How do you guys power hobs and ovens etc? I went over this stuff with my electrician neighbour btw, just to be safe.