RCD SAFETY INFORMATION
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 and 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.