DIY and Electricity

Introduction
Residual Current Devices
Plugs
Fuses

Introduction
Power tools make light work of many DIY jobs but electricity can be a killer unless we use it safely and sensibly.

1. Keep electrical appliances away from water. Don't even wash walls without turning off the power at the mains switch.
   
   
2. Don't be tempted to use a socket or plug or equipment which could have water in or on it. Allowing it to dry could save your life.
   
   
3. Always read manufacturer's instructions on extension cables, e.g. they could overheat if left coiled. Make sure an extension is appropriate for the appliance to which it is connected.
   
   

Residual Current Devices
Residual Current Devices (RCD's) can react to changes in the flow of electric current. For example, when a flex or cable is cut or an electric tool malfunctions, and direct contact is made with a mains supply conductor and earth, the RCD will automatically disconnect the power supply to the equipment to reduce the risk of you being electrocuted.

RCD's are available in various forms:

1. As portable adaptors
   
   
2. Incorporated in socket outlets
   
   
3. As stand-alone units for fixed wiring installations offering whole house protection
   
   
4. As separate units for use in household consumer appliances
   
   

Although RCD's are a vital safety aid, they cannot ensure100% protection

Never work with electricity in damp or wet conditions. If you MUST, always use an RCD. Always place the cable of a hedge trimmer or mower over your shoulder and keep it behind you at all times.

Plugs

1. Do not overload a socket with too many plugs or adaptors.
   
   
2. Don't allow cables and flexes to become kinked or frayed. Ensure plugs are undamaged and tightly closed with no loose connections and that cord grips are tight.
   
   
3. Ensure plugs are fitted with the correct fuses. Fuses help protect cables and flexes from the effects of overheating caused by short circuits and overload.
   
   

Fuses
New appliances have to be supplied with a plug that is fused in accordance with manufacturers' instructions.

1. Always follow manufacturers' instructions for fuses, or seek expert advice.
   
   
2. Check older appliances such as electric blankets and Christmas tree lights.
   
   
3. If a fuse blows for no apparent reason or an appliance is not working properly, switch off the appliance at the socket and unplug it before investigating why.
   
   
4. The same principles applies to fuse boxes or circuit breakers - always switch off at the mains before you investigate and remember to replace the cover before switching back on.
   
   
5. If you need to change a mains fuse, check the correct rating for that circuit - the blown fuse mayt have been incorrect in the first place. Using a thicker fuse wire than the correct rating is dangerous.
   
   
6. If In doubt, call a qualified electrician.