[Amps] Large 3 way switch required

[g0ruz@btinternet.com (Conrad G0RUZ)]

The transformer that I am using in my HT supply has 3 taps on the primary,
in practice they equate to 4000,3500 and 3000 VDC. I wish to be able to
switch them from the front of the supply, does anyone have a suitable rotary
switch that they can sell me? It will need to handle 240 volts at 30 amps. I
will be switching the supply off before changing the taps of course!

Conrad G0RUZ