415.2.2

[sparks1234]

Can anyone give me a simple rundown in plain english on this one, how it relates etc etc

Many thanks

 

[Guest123]

Hi.

What it means is, to check the effectiveness and compliance of supplementary bonding, total resistance (R) between exposed and extraneous conductive parts must not exceed the calculation of 50/the mA rating of the associated RCD.

I.e, 50/0.03 = 1667ohms.

Where there is no RCD protection then the current causing the fuse/MCB to disconnect in 5s is used instead of the RCD rating.


Bathrooms would be one example whereby supp bonding may now be ommited if ALL circuits within that bathroom are protected by a 30mA RCD.

 

[sparks1234]

Cheers Len

 

[james king]

tell you what lenny is the man he knows every thing only been on this site for bout a week and he has helped a lot along with a few others cheers

 

[sparks1234]

nobody's opinions should be discounted on here though. As one of my tutors said there is a lot of engineering judgement needed in electrical works.
Anyone can interpret a regulation right or wrong and thats why these forums are so good for opinions.