Supp bonding

[Baker1988]

Hi can any one help me to clarify when exactly is supp bonding needed within a installation, i have read reg 415.2 in the bgb but it does not really clarify things, is they a specific reg i should be looking at?

 

[Simonslimline]

This is worth a watch mate


QR code 2 -- Protective supplementary bonding test - YouTube

 

[Baker1988]

Thanks for that simon but to be honest i already new what the video explained, but i was just wondering if there was like a rule of thumb or something as surely you wont just go to every metal part in the house and test it to see if it needs supp bonding, like if you went into a bathroom would you have to test every thing in the bathroom that was metal or could you just know that it needs supp bonding by looking?

 

[Richard Burns]

Supplementary bonding is there to reduce touch voltages in the case of a fault in areas of increased risk.
Therefore in places where there a fully immersed bodies in water, animals (with larger footprint), etc. then supplementary bonding may be required.

Have a look at the bathrooms, swimming pools and agricultural special locations sections these provide more information for those areas.
GN8 also details SB.

If you are installing it then you would need to know if the parts were extraneous or not.

 

[martinh89]

I always got told in old properties that don't have RCD protection in areas with increased risk of electric shock, you supplementary bond metal work that can be simultaneously touched

 

[Richard Burns]

I always got told in old properties that don't have RCD protection in areas with increased risk of electric shock, you supplementary bond metal work that can be simultaneously touched

Hopefully this should already be in place as part of the standard protective measure for the location when it was originally installed, but if it is not present then it should be installed.
If RCD protection, main bonding and ADS are present the the regulations permit the exclusion of supplementary bonding in a room containing a bath or shower.

 

[martinh89]

Hopefully this should already be in place as part of the standard protective measure for the location when it was originally installed, but if it is not present then it should be installed.
If RCD protection, main bonding and ADS are present the the regulations permit the exclusion of supplementary bonding in a room containing a bath or shower.

Without a doubt I would always recommend to the customer that rcd protection in locations of increased risk of shock is a must to comply with the current regs. I've even turned work away for work in bathrooms that aren't rcd protected(old fuse boards etc....) after recommending an up grade and the customer refusing