Replacing a fused CU ?

[Terry Fields]

One can imagine the conversation:

"How effective has Part P been?"

"Oh, I wouldn't know, we only set policy, we don't monitor it!"

"So you can't say whether it has done any good?"

"Of course it's done good, we wouldn't have brought it in, otherwise!".

[John Rumm]

IIRC there was a question asked in the house recently on the apparent rise coincident with part P. A search of Hansard will probably turn up something.

There are figures available and well documented for the effects of shock and the implications of shock current and duration of exposure:

RCD protection offers very much more than a "feel good factor" - unless you include the ability to breathe and absence of ventricular fibrillation as "feel good" ;-)

Note also RCDs are used not only to lessen shock risks, but also as a earth fault protection mechanism. A TT install with a 6 ohms fault loop impedance could end up sinking 40A for an extended period of time into a protective conductor without tripping a typical 32A MCB on a power circuit. This would (in the absence of the RCD) result in at best cable damage, and possibly fire.