dennis@home wrote:



"ARWadsworth" wrote in message
...
I am (or rather a customer is) after something like this

http://www.maplin.co.uk/13a-wall-soc...-in-usb-340875

but with a double socket.

Or a stand alone hard wired USB mains powered USB point will do.

Suggestions welcome if you have used one.


Don't fit one, you cant turn them off so they waste power all the time.

They say that when the USB shutter is closed the USB is off.

De-rate the cable depending on how well the socket and back box is
insulated and how much power the PSU uses both when idle and in use. They
do provide the technical data required to check this?

You don't usually bother with derating for a couple of inches of varied
conditions as the cable is sufficiently conductive thermally to cope with
this.

It's a great idea - but I would recon on the 13A socket standard (and a
typical fitting) outlasting the USB standard by at least a factor of two.

--
Tim Watts