My hot and cold pipes are rubber, so no possibility of applying supplementary earth bonding to the taps. I have a towel rail piped with central heating water which is plated with some low conductivity alloy (looks like chrome). There is no RCD on the lighting ring.
I've connected an extension lead to the ring main and used the earth from that to determine that the copper pipes to the towel rail have 2.9Ω between them and earth. The towel rail coating appears to be around 40-100KΩ for 5cm.
As the copper pipes to the towel rail are only 2.9Ω from earth and there is already supplementary earth bonding in the airing cupboard to all the water pipes, do I need further supplementary earth bonding in the bathroom itself?
I've connected an extension lead to the ring main and used the earth from that to determine that the copper pipes to the towel rail have 2.9Ω between them and earth. The towel rail coating appears to be around 40-100KΩ for 5cm.
As the copper pipes to the towel rail are only 2.9Ω from earth and there is already supplementary earth bonding in the airing cupboard to all the water pipes, do I need further supplementary earth bonding in the bathroom itself?