Pat Testing


We provide a fully comprehensive PAT testing service including a full workspace electrical risk assessment, A detailed and itemised list of items tested with results, an out of hours service to minimise business interruption including weekends and a 30 day invoice period to help with your business cashflow.

What we include

  • Electrical Inspection and Testing of all portable appliances
  • Test Labels on all Appliances
  • Full computer-generated test results
  • Results Sent to Client in written or digital formats
  • Minor Repairs to Flex and Re-wire of Plugs
  • Free Replacement Plug Fuses
  • Free Re-tests if done on same day as test
  • All work carried out by qualified electrically trained personnel
  • All work fully insured
  • Pricing done by bands (15 items per band)

Do you own, manage or work in any of the environments below?

  • Offices
  • Hotels, guest houses
  • Schools
  • Public buildings
  • Construction sites
  • Restaurants
  • Landlords
  • Shops
  • Other public accommodation including leasing
  • University accommodation
  • Tourist centres
  • Industrial premises
  • Nursery schools
  • Fitness centres
  • Letting agents
  • Any business with staff and/or members of the public who have access to portable appliances

If so then its a legal requirement that all electrical portable appliances are maintained in a good safe working order.

The main reasons why you should test your appliances are:

  • The Law requires businesses and public places to maintain the safety of electrical appliances
  • You can be prosecuted if you do not comply
  • Appliances will be safe for employees, clients and others to use
  • Faults will be rectified ensuring productivity of appliances
  • Appliance testing will find safety faults on appliances that otherwise would not be found
  • Insurance companies may require the testing of appliances
  • Don’t wait until it’s too late. Good maintenance and a regular appliance inspection and test will help to prevent future and unexpected problems

What dangers could occur in portable appliances?
From experience, appliances in the workplace are often found to have the wrong fuse rating inside the plug top. This can result in appliances failing to automatically switch off if a fault occurs.

Dangerous and lethal wires in the plug top and in the flex may be exposed, frayed or not tightened to the connections properly, putting users and premises at risk of electric shocks and fires.

Many appliances have metal casing which relies on an essential connection between the outer casing and the earth connection in the wall socket. Experience has shown that the earth connection is often incorrectly connected or broken. This means that the appliance is not earthed and can result in a major electric shock to the user should a fault occur.

It is important that a system of regular inspection and maintenance is employed to reduce the risk.


What does PAT testing involve

Visual Inspection
Every portable appliance tested by Stirling Electrical Services is visually inspected to check the plug, flex and body of the appliance. In this visual inspection we will investigate for damaged equipment, frayed flex cords and/or flex cords taped up to cover unauthorised joints, flex wiring pulled away and exposed from the internal casing of the plug, signs of overheating on the flex and internal wiring inside the plug, cracked and damaged plugs including loose and faulty wiring connections inside the plug.

A high number of appliances fail this visual inspection due to having the wrong type of fuse in the plug, loose plug connections, exposed wiring at the plug and damaged plugs.

As part of our service, minor repairs such as above will be repaired free of charge, thus allowing the appliance to pass the visual inspection.

Testing Procedure
Only when we are satisfied that the equipment has passed the visual inspection, a series of tests using the latest state-of-the-art computer testing equipment are carried out to detect hidden faults and potential hazards. This ensures the electrical safety and good working order of each item.

Computerised and industry set tests are carried out using Portable Appliance Testing equipment similar to the tester pictured above. In the testing procedure we will carry out the following tests.

Earth Bond Test – Tests the metal casing of equipment to confirm the integrity of the appliance earth conductor. A high A.C. current of 10amp or 25amp is passed between the earth bond terminal and the appliance’s earth pin.

Earth Continuity Test – When testing IT Equipment – e.g. computers in offices, it is undesirable to use the high current Earth Bond Test described above as this could damage the equipment. On IT equipment our testing procedure would involve testing the equipment with a low current earth continuity test. A low current (200 mA D.C.) is passed between the continuity terminal on the testing equipment and the appliance’s test socket earth pin.

Insulation Test – An insulation test is carried out on all equipment to verify that the insulation resistance is correct and sufficient between the appliance wiring and internal components. In this test a 500 volt D.C. supply is used to test the insulation resistance.

Operation Test – This test will start up the equipment being tested as if it were normally plugged into a 13 amp socket outlet. By doing this test we will be verifying the power consumed by the appliance, which we will check against the manufacturers rating which is stamped on the appliance. This will also determine if the correct size of fuse is inserted in the plug top.

Earth Leakage Test – By carrying out the Operation Test we will also find out if any electrical current is flowing to earth. Normally appliances should have no or very little earth leakage current. The appliance tester will also be able to detect earth leakage in Class 2 (Double Insulated) appliances. This enable account to be taken of all leakage paths to earth rather than just that flowing in the earth wire if applicable – e.g. a Class 2 appliance could exhibit earth leakage through its mountings or by operator contact.

Flash Test – This test ( Dielectric Strength Test) is very rarely carried out and it is not normally carried out as routine test. The test stresses the asset insulation. This test is usually only carried out if the appliance has been completely overhauled and is being put back into working service.