Electrics safety 2 - diy safety and regulations| Diy Fix It

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This material is " for information purposes " only. Strict rules govern what electrical work can be done without notification and inspection. Read more...

Earth bonding

Different regulations may apply where plastic plumbing has been used. Please consult the Institute of Electrical Engineers Regulations for details, or seek the advice of a professionally qualified electrician.

There are strict rules on earthing of metal items in a house. All must be bonded to the earth connection terminal at the consumer unit. They include radiators, pipes, sinks, basins, baths, towel rails etc. These may be linked together and connected to the Earth terminal or separate earth cables may be used for each. The minimum size for this cable is 6mm sq. Earth cables have a green and yellow sleeve.

Connection to each of these items is made by using an earth clamp or tag on the item. Metal sinks, for example, have an earthing tag pre fitted to them.

Clamps, used to earth metal pipes, consist of a strap which is fastened around the pipe and a terminal to which the earth wire is connected.

The effectiveness of the connection is vital. So, if you are not certain how this should be carried out or have not done it before, have the work done by a professional and get them to show you how it is done. A common error is to fit an earth clamp to pipework without cleaning away oxidation or paint from the surface first. The result of this is that there may not be a good bond between the two. Positive contact between the pieces is essential. Any earth bonding carried out should be inspected by a qualified professional.

Kitchens and bathrooms

Special regulations govern the electrical work in kitchens and bathrooms because of the extra danger presented by the presence of water. If you intend working in these areas, refer to the I.E.E. Wiring Regulations to familiarise yourself with the requirements.

Some of the rules included are:

Light switches in a bathroom should be of the pull-cord ceiling mounted type.

Electrical socket outlets are not permitted in a bathroom. The only exception to this is the type specially designed and approved under the appropriate British Standard for electric razors.

Electrical socket outlets in a kitchen should be sited so that it is not possible to touch them when using the sink.

Electrical Safety (page 2)

Earth bonding

Kitchens and bathrooms