Portable Appliance Testing, Overheated Plug Socket

One good reason to have your portable appliance testing (PAT) carried out. Our fault of the week is a good example of a multi socket electrical extension lead that has become overheated with early signs of burning.

This fault was found by a Veriserv engineer during an annual portable appliance test (PAT) . The socket has become overheated. This could be caused by a loose connection or as a result of supplying an appliance which uses power in excess of the extension leads recommended maximum limit. Most extension leads of this type are rated at 13 amps so this means you should not plug more than one 13amp appliance into the extension socket at the same time. Multiple appliances should be rated at 5 amps.

The plug which connected to the overheated socket is shown below.

It is important that all appliances are fitted with a fuse which is correctly rated for the appliance it powers. A new portable appliance will already be fitted with a sealed plug and correctly rated fuse. The plug shown in this photo is the type that has probably been fitted at a later date. It is important that the fuse rating is checked during the portable appliance test. Veriserv engineers would check this during the test and replace if necessary.

As a result of the PAT test by Veriserv the overheated extension lead and plug would be taken out of service and reported immediately to our customer.

In the work place all portable electrical equipment should be subject to  ‘User Checks’ however in this case it seems the deterioration of this piece of equipment has gone unnoticed. Ideally in this situation, as soon as any damaged is noticed the piece of equipment should be switched off and taken out of service.

In any event, in the workplace it should not be acceptable for a defect to go unnoticed, therefore the Institute of Engineering and Technology (IET) recommend that formal visual inspections are undertaken periodically by a competent person to identify these hazardous items.

All Veriserv PAT engineers are qualified to the City & Guilds 2377 Level 3 award in the in service inspection and testing of electrical equipment (PAT) 

If you need advice on Portable Appliance Testing please feel free to request a quotation or call Veriserv directly on: 01543 225306.

Useful References:

The Institute of Engineering and Technology (IET) publish guidance for the maintenance of portable appliances

The Health & Safety Executive (HSE) provide useful guidance on Portable Appliance Testing  

IET Code of Practice for In-service Inspection and Testing of Electrical Equipment Chapter 15.8

Provision & Use of Work Equipment Regulations 1998 Regulation 5
The Electricity at Work Regulations 1989, Regulation 4(1)

If you need advice on Portable Appliance Testing please feel free to request a quotation or call Veriserv directly on: 01543 225306.

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