In message ,
(jim_in_sussex) wrote:


hopefully yes, but a fuse/mcb won't trip on the current/voltage that
gives a fatal shock - you need an RCD - even then that takes 0.4s - or
40 half cycles each reaching a peak 340volts.


Leaving aside the merits or otherwise of RCD protecting and/or bonding
everything in sight, I thought the specification for the "life saving"
30mA trip RCD was 40ms, not 400ms (i.e. 0.04s, not 0.4s) though
admittedly this 40ms is at 5x30mA. Having said that, even 150mA isn't a
lot of current - even a really manky earth should allow that amount
through (V/I=1600R).

Hwyl!

M.

--
Martin Angove: http://www.tridwr.demon.co.uk/
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