Just wanted to say a huge thank you for your excellent service both from the website and from the staff I spoke to over the phone in your Hammersmith and High Street Kensington branches. I ordered a pale blue Roberts radio (RD50) and it was dispatched that day and arrived the next day. It is very rare to get service like that these days!
There are two types of RCD’s: Active & Passive, also termed Latching & Non-latching.
Both types are accepted by British Standards and it is up to the user to choose the type of RCD that is most suitable for their application.
Active (Non-latching) - RCD’s switch off if power to them is turned off. Every time the appliance is turned off, the RCD will trip & have to be reset by going to the socket.
Passive (latching) - RCD’s “remember” what state they were in prior to the power being switched off.
On the resumption of the power, the power will then continue to be supplied to the appliance, & the RCD does not need to be reset.