17th edition bathroom bonding

Works fine.. I'll see if I can find a 16th edition one which can be modified - I think bathroom zones are in a separate wiki. Cheers BS, speeling isn't my stringest point. What research is that? Where's the provenance. Taylortwocities , 13 Sep However, if the RCDs were operated regularly by means of the integral test button, this figure fell to 2.

In my experience RCDs tend to either work or fail unsafe. By fail unsafe I mean fail to work at all rather than be too sensitive which I would call fail safe I suppose. Of those that work I include those that trip but outside the specified times. Frequent pressing of the test button to stop any "stickiness" by the mechanism seems to improve things but in reality despite test notices it is rare for people to do this. You must log in or sign up to reply here.

Show Ignored Content. Related Threads. Replies: 4 Views: Replies: 51 Views: 1, EFLImpudence 2 Jul Zone 3 is removed. Socket-outlets, previously banned from bathrooms because of the risk of dampness causing electric shock, are now allowed, but they must be fitted three metres from the boundary of Zone 1.

This probably means that many bathrooms will not be allowed to actually have socket-outlets, as they will be too small to comply with the new three metres rule. Importantly, all circuits need now 30mA RCD protection. However, any such socket-outlet would probably have to be on a spur, because any circuit entering an area with a bath or shower must terminate there and not carry on to any other area.

Note also that all cables buried in walls surrounding bathrooms and shower rooms , regardless of the pints they are serving, have to be protected by 30mA RCDs. This important change Chapter 41 concerns socket-outlets in the domestic environment. Additional protection is now required for all socket-outlets - for automatic supply disconnection.

Such RCDs will be provided for the following:. Therefore, essentially, every domestic room - including bathrooms etc - now requires RCD protection for each socket, though there is debate about the best way of achieving the required protection. There is also an exception for deep freezers where nuisance tripping could ruin foodstuffs or make them dangerous. Although supplementary equipotential bonding is no longer required in bathrooms or shower rooms under the requirements of the 17th Edition, it is still important not to confuse supplementary bonding with equipotential bonding on gas and incoming water supply immediately upstream of the cocks.

There are, essentially, three forms of bonding, and they should not be confused with 'earthing'. The following are definitions though not defined as such in the 17th Edition :. Where main equipotential bonding of metal services is necessary, main equipotential bonding conductors are required. The following metal parts should be connected to the main earthing terminal, where they are extraneous-conductive-parts:.

Alterations and additions to an installation Regulation The reason is that when making an alteration or addition to an existing installation, Regulation The words 'if necessary' have been added to clarify that, in some instances, the condition of the existing earthing and bonding arrangements may not have any bearing on the intended altered circumstance and would, therefore, not need to be upgraded. In terms of protective bonding, it has been established whilst assessing an existing installation, prior to an alteration to the fixed installation, that the main equipotential conductors are undersized and do not comply with the 17th Edition.

Is this acceptable? The answer is that there has been no change or relaxation from the 16th Edition. Regulation There are other Special Locations in the 16th Edition. The 17th Edition has them too, but there have been changes and additions. So the existing and new Part 7s are [new Part 7s designated n ]:.

The 17th Edition includes additional sections on special locations not currently included, as follows:. Section - Swimming pools and other basins - The requirements now include fountains and the zones have changed from A, B, and C to 0, 1, and 2 ie: numeric, not alphabetic. There has been a simplification of lighting issues. Section - Rooms and cabins containing all sauna heaters not just hot air.

Zones are now 1, 2 and 3. Section - The 17th Edition now covers construction and demolition sites. The reduced disconnection times and 25V equation no longer appear. Section - Agricultural and horticultural premises.

No 25V or reduced disconnection times. Under IEE regulations the bathroom is now divided into zones for electrical purposes. The zone qualifications are quite complicated and professional guidance should be sought for any proposed electrical work in the bathroom.

The basic rule is that no source of electrical supply should be accessible from a position where one can be in contact with water at the same time. Insulated operating cords of pull switches are permissible but they must be in accordance with BS , which in most cases will be stamped or labeled on them. Information can be found at the institute of electrical engineers website.

Please also see new regulation notes below. Wiring regulations and notes for earth bonding and earthing plastic pipework. You may also need to look at the regulations governing the height of electrical sockets if you are installing new sockets. Until 2nd July 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. Section in the 17th Edition deals with rooms that have a bath or a shower installed.

Supplementary equipotential bonding between waste pipes, metallic service pipes and earth connections of bathroom equipment is no longer required if, and only if, the main bonding between metal service pipes can be proved to be continuous. If so, the need for bonding yellow and green cable is unlikely to be necessary. You are now allowed sockets in a bathroom if they can be placed at least 3 metres from the boundary of zone 1. Any such socket however, would need to be a spur socket or the end of a radial circuit as any circuit entering a bath or shower room must terminate there.

Also please note:. If you are in any doubt about the safety and legality of your project, please contact a qualified electrician. All project content written and produced by Mike Edwards , founder of DIY Doctor and industry expert in building technology. Apologies, but we don't seem to have a video for this project yet, but we will do our best to get one up soon. Find a tradesman now! We love feedback on our DIY tutorials it helps us to make them the best they possibly can be so if you have any comments you would like to share with us, click the button below and let us know.

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