Jim Stewart wrote:



My shop is wired 415V 3 phase. Did it all myself with an inspection by
the electrical contractor before the sub board was 'hot'. Can't see
it'll kill you any deader than lower voltages. I did it all to code
because *I* was the one going to be using it.

First of all, I'm no expert and I'll certainly
defer to the pro electricians in the group.

That said, 440/480 is uniquely dangerous in it's
ability to sustain a plasma fire without tripping
upstream breakers.


Not so at all


A screwdriver dropped onto
busbars can evolve into something that will burn
your arm off or worse.

So can 25V if you work it right, but 440/480 is no worse that 240 for
sustaining a phase to phase arc.



I think the electrocution risk is substantially
greater than 240V as well.



PDW

jk