From a purely technical and practical perspective, either Schuko or BS1363 would actually perform perfectly well on a US 240V supply.

From a safety perspective, either of those plug/socket systems are beyond what UL would mandate although they do not have UL certification as they are not intended for sale in the USA.

Unlike NEMA outlets, both CEE 7/X and BS1363 provide standard finger protection to prevent shock.

Schuko (CEE 7/X) does this using recessed socket outlets and a standardised plug body shape that keeps the pins entirely out of reach when you are inserting/removing the plug.

BS1363 (UK/IRL system) uses sheathed pins.

The big issue with using these plugs in the US is that they are not likely to be approved by the US wiring codes, even if they are excellent standards.

BS1363 (UK/IRL) does however expect to see 230V on Line and 0V on neutral. Some 'switch sockets' would only isolate the line and not the neutral, although double pole versions are available. Also, if the fuse blew in the plug, it would not isolate the neutral.

Your local regs may have issues with CEE 7/7 sockets (Schuko) as they are not polarised. However, with a US 240V supply, both sides are hot anyway, so it makes very little difference in reality.

We have issues using NEMA plugs in Ireland for 110V as they are not approved by a recognised standards body here. The unsheathed pins also prove an issue.

I'd say if you're going to install a 240V socket, use whatever NEMA equivalent you can find to comply with the code.

If you opt to install BS1363 or Schuko (CEE 7/X) you will be perfectly safe, but you will have probably breeched the wiring code by using non-US-approved fittings.

Last edited by djk; 08/15/10 12:10 PM.