- Reaction score
- 5,382
it aint a constant paul...GN7 table 1.1 gives the "Total body impedances (Zt) for a current path hand-to-hand" for a human.
@ 225V (from the book) 5% of the population has a Zt of 775 Ohms
50% has 1225 Ohms
95% has 1900 Ohms
Think of these figures when you next get a belt protected by an RCD. I've had a shock earlier this year from another sparks cock up and I must be in the 1900 Ohms range of body Zt, it was a hand to hand shock and I did'nt die BUT the circuit was protected by and RCD and it did'nt trip??? Full test on the RCD and it was fine????
Older people, people with medical conditions etc may still receive a fatal shock. RCD's are not the miracle cure for everyone. Lets get that straight from the start. Yes they are good but they are not to be sold as "a shock free device".
depends on moisture of skin content as well...