Why are British "shaver sockets" limited to using a single plug at at a time, and given this, how are you supposed to use two appliances?
Those shaver sockets are actually a small transformer with 1:1 windings. That provides mains voltage in, and the same voltage out. The only difference is the output voltage is &quot;fully floating&quot; with absolutely no ground return or reference. You could accidentally touch the voltage and the faucet with no current flow. The only way to get a shock would be to touch both sides of the output.