Earthing/bonding new electric shower

[Papaleekie]

Can someone please advise. I am aware that new electric showers need to be part P certified and installed by a qualified sparks. But there seems to be some disagreement between sparks whether or not it's necessary to bond the earth terminal to copper pipes in the bathroom. The water feed to the shower will be in plastic pipe. What does building regs demand? Thanks.

[heathfield]

Google 'electric shower earth bonding' for info on bathroom earthing and find links such as this one...

http://www.diydoctor....s/bondingbathroom.htm

[BRIGHT SPARK]

Providing all electrical outlets within the bathroom are protected by a 30ma rcd that trips within the specified time perameters no earth bonding is required within the bathroom.that said it will do no harm to bond any pipework together.Main bonding to incoming services ie gas, water, oil and structural steel MUST be in place and confirmed continuous.

[buildersmate]

I just don't believe the above answer. I am staggered because I had believed the above responder to be a qualified electrician (I am not - merely a humble Chartered Engineer - in Electronics - which doesn't qualify me to know the answer to this question).
This question should be about supplementary equipotential bonding of bathroom pipes TOGETHER. And the answer is that all extraneous-conductive parts and the protective conductors of all circuits supplying appliances and accessories in Zones 1, 2 & 3 should be bonded together.
I repeat, this is about supplementary bonding, not earth bonding.

[buildersmate]

BTW, it is nothing to do with Part P - this is IEE Wiring Regs we are talking about.

[BRIGHT SPARK]

BM.. Please read the RED section of the above link

[BRIGHT SPARK]

BTW...Zone 3 no longer exists..

[buildersmate]

So I did that and found this : -
Until 2nd July 2008, the 16th edition of the wiring regulations applied as well as the 17th edition. From that date all installations must comply with the 17th edition only. The new requirement is for all electrical equipment in bath and shower rooms to be bonded together along with all metal pipework. Supplementary bonding connects to the earth wiring of the electrical equipment inside the bath or shower room. It must not be taken back to the main earth terminal in the consumer unit.

So how does your answer align to this requirement?

P.S. Thanks for keeping me up to date on the removal of Zone 3 - as I said, I'm not qualified to answer this question.

[BRIGHT SPARK]

BM...Reg 701.415.2 of BS 7671 2008.states that if ALL the requirements of my first answer are met then suplementary bonding is not a requirement within the three zones.

[BRIGHT SPARK]

BM...you need to read further down the link..