In pre-residual current devices mitigate this disadvantage, the TT earthing system has become much more attractive providing that all AC power circuits are RCD-protected.
12.
In this application the " dedicated " socket refers to one that is not connected to a residual current circuit breaker, which is otherwise mandated for all normal power sockets.
13.
The second problem, the inadequacy of fuses to act as the sole safety device in most power systems, is probably best resolved by the use of residual current devices ( RCDs ).
14.
Another way to protect circuits under the 17th Edition IET Wiring Regulations is by fitting Residual Current Circuit Breaker With Overload ( RCBOs ) to every circuit although this can be a very costly method.
15.
GTO thyristors suffer from long switch off times, whereby after the forward current falls, there is a long tail time where residual current continues to flow until all remaining charge from the device is taken away.
16.
Reset buttons or keypresses on any computer cannot erase the contents of system RAM, which can only be done by powering the computer off and waiting approximately 10 seconds for residual current in the RAM chips to dissipate.
17.
I have not found a protective device inside toasters I have disassembled which would cause them to trip when immersed, unless the unit is plugged into a residual current device / ground fault interrupter . talk ) 00 : 25, 21 October 2008 ( UTC)
18.
This type of consumer unit was very popular in Britain until 2001 when wiring regulations mandated residual current device ( RCD ) protection for sockets that could " reasonably be expected to " supply outdoor equipment ( BS7671 : 2001, ISBN 0-86341-373-0 ).
19.
Other important locations are Erba, where all the domotics products and video intercoms are developed and produced; Ospedaletto Lodigiano where is located the central warehouse; Bodio, where the plaques are made; Azzano San Paolo and Torre del Greco, where are developed and manufactured devices industrial and residual current device.
20.
If you just cut the power, the superconducting coils stop superconducting-suddenly they have a resistance and whatever residual current there is ( LOTS ! ) heats up the coils and boils the liquid helium-which then vents from the top of the machine ( to avoid exploding ) and suffocates everyone in the room . ( You can just imagine them screaming for help in those tiny squeaky voices ! ) Powering one of these babies down correctly in order to pull off a stray paperclip is half a day's work ! talk ) 16 : 57, 18 December 2007 ( UTC)
