supplementary bonding to 17th

[Katron]

I understand that all circuits in bathroom are on rcd or rcbo's but have read there would be no need for sup bonding, but in the regs I thought that if you have heating you still need bonding or have I just got it wrong?

Thanks

Be nice BAS ( I do value your input )

 

[17thman]

page 166 701.415.2

Where there is an equipotential bonding system and all of the folowing conditions are met then

1) reg 411.3.2 is satisfied ie automatic disconection of supply is complied with on all final circuits

2) All Final circuits have RCD protection

3) All extraneous conductive parts of the location are effectively connected to the to the equipotential bonding 411.3.1.2

you may need to check 415.2.2 ie R (resistance between simultaneously exposed conductive parts and extraneous conductive parts ) is equal to or less than 50v/Ia

You can then ommit it.