Socket Overload Calculator

Most people make use of extension leads in their homes and in their places of work to increase the number of appliances which can be plugged into each socket.

However, users should be wary that while there may be space to plug in multiple appliances, it may not be safe to do so. Different electrical appliances place different power demands on the power circuit, and as such, it may not always be safe to plug, for example, four appliances into a 4-way bar adaptor.

You should never overload an extension lead with appliances which will together exceed the maximum current rating for the extension lead. This can lead to the plug overheating, and potentially lead to a fire. A typical extension lead is rated at 13 A, however some can be at 10 A or less. The rating for each extension lead should be marked on the back or underside of each extension lead.

Use the calculator below, which has been developed by Electrical Safety First, to view the effect on the current load by plugging in some typical household appliances. The calculator also provides some useful tips on how to avoid overloading your sockets.

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The Socket Calculator has been brought to you by Electrical Safety First.

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