to earth or not to earth.

[RogertheBodger]

It won't actually trip, the human body is normally between 1500 and 2000 Ohms so that would be asking a lot!

Well ...... You've just got out of the bath before you stick your fingers in?

 

[dekachad]

tonys.......... I know of around 6 houses in bulgaria with no earth and stayed in a few hotels hotels around europe with no earth too.

 

[dekachad]

Roger......... good point, but even with a cpc you would still get a shock touching live and neutral.

 

[RogertheBodger]

Roger......... good point, but even with a cpc you would still get a shock touching live and neutral.

True, but thats what I said..... isn't it?

 

[IQ Electrical]

Well ...... You've just got out of the bath before you stick your fingers in?

Ok, call me sad but from the IEC publication DD IEC/TS 60479-1 a table of average body resistances was compiled for wet and dry.

The table is reproduced in Guidance Note 7 and the ranges were 575-4100 Ohms.

These measurements were carried out hand-hand and a reduction of between 10% and 30% is thought to allow for a hand-foot measurement.

Even using the adjusted figure, it would be impossible to trip a 6A type B MCB even.

Now how's that for being sad?

 

[Giovanni]

Oscar Mike lads time to exfil......this has to be a windup

 

[Paul.M]

Roger......... good point, but even with a cpc you would still get a shock touching live and neutral.

Old trick of the trade. If you put a bit of green sleeving on the neutral it becomes the earth aswell and the rcd will work

 

[RogertheBodger]

I.Q ...... Not sad, meant as fun, I,m sure everbody on here has got the utmost respect foryou, and I,m sure you're right, I didn't know the resistance of a human body, I can always learn something new
But I'm determined to get that mcb to go, How about "you are wearing your wifes new aluminium foil dress" or "you stick one ear in the live and......" or - what other ways . anybody?

 

[IQ Electrical]

I.Q ...... Not sad, meant as fun, I,m sure everbody on here has got the utmost respect foryou, and I,m sure you're right, I didn't know the resistance of a human body, I can always learn something new
But I'm determined to get that mcb to go, How about "you are wearing your wifes new aluminium foil dress" or "you stick one ear in the live and......" or - what other ways . anybody?

Ah you've got me now, the old aluminium dress combo!

 

[Amp David]

Just got in from work and saw this thread, WTF?

 

[dekachad]

Lol. but no one has come up with a need for an earth when all circuits are protected by a rcd. it is thinking outside of college teachings, rules and regs.

 

[Paul.M]

Ah you've got me now, the old aluminium dress combo!

How about when you were a kid and your mum use to put a string up your arms across your back to your mittens? If she ran out of wool and only had an off cut if 1mm cpc to attach your gloves, would that trip the rcd.

 

[RogertheBodger]

Lol. but no one has come up with a need for an earth when all circuits are protected by a rcd. it is thinking outside of college teachings, rules and regs.

Thats because without an earth the circuits are NNNNNNNNNNOOOOOOOOOOOOOOTTTTTTTTTTTTTT!!!!!!!!! PROTECTED BY AN RCD.

 

[IQ Electrical]

Lol. but no one has come up with a need for an earth when all circuits are protected by a rcd. it is thinking outside of college teachings, rules and regs.

Actually, I listed 4 or 5 good reasons for an 'earth' but perhaps you didn't understand the theory?

I only say that because of your last post where you are still of the opinion that an rcd is fine without a form of earth.

 

[dekachad]

so does a rcd not work without a cpc?