Quote:
Originally Posted by Humptydumpty
I know this is an old post. Thinking about this I don't see any mention on the plug the plugs are for AC or DC use just 240 volt etc. and that goes for the equipment it is used on.
|
The 13 amp plugs and sockets are intended to be used on AC only. It was not considered that the plugs need be marked "AC only" because any 13 amp socket should be connected to an AC supply, with an earthed neutral, and at 220/240 volts, 50 cycles.
One feature of the 13 amp system was that it was a general purpose connector for use by anyone WITHOUT having to check for AC or DC, odd voltages or odd frequencies.
Legacy systems that used DC or non standard voltages or frequencies remained in use for many years, but should not have been fitted with 13 amp sockets.
Most other types of mains plugs were suitable for AC or DC, as were the matching sockets. Regulations required that sockets on DC supplies had switches. This was optional for AC.