PAT testing is not, in itself, a legal obligation.

However, current UK legislation states that businesses must maintain electrical equipment in a safe condition.

They also have a legal responsibility to ensure the safety of employees and the public.

Because PAT testing is one of the most effective ways to do this, particularly for high risk or large, complex environments, it has become a standard way of meeting this legal obligation.

Depending on the severity of the situation, the penalty for not meeting legal obligations on electrical appliance safety can be as high as 2 years’ imprisonment, as well as an unlimited financial penalty.

The ‘Employer’ is responsible for electrical appliance safety.

In larger businesses a ‘competent person’ is often appointed by the employer, whose role is to make sure the company is compliant.

There are 2 main factors which determine whether or not an item should be PAT tested:

– The electrical ‘class’ of the item
– The ‘category’ of the item

Electrical appliances are mainly categorised as Class 1, 2 or 3, with Class 1 being the most dangerous and Class 3 the least dangerous.

The class of an appliance helps determine whether it needs to be PAT tested and to what degree. Class 1 appliances need a full PAT test, Class 2 appliances need a PAT insulation test, and Class 3 appliances don’t need to be PAT tested at all.

Class 1 appliances
This type of electrical equipment has only basic insulation and relies on an earth for protection.

Class 2 appliances
This type of electrical equipment has extra insulation and so doesn’t rely on an earth for protection, which makes it safer.

Class 3 appliances
Class 3 appliances are low voltage items and are the safest class of electrical appliance. Their charging leads may need to be PAT tested.

There are 7 categories of electrical appliance which require some level of testing, either a simple visual inspection, or a full PAT test:

– Fixed appliances
– Stationary appliances
– IT appliances
– Moveable appliances
– Portable appliances
– Cables and chargers
– Hand Held appliances

There are no specific rules for the frequency of PAT tests. However, the regulations say that the level of precaution taken should be ‘appropriate’ to the risk.

There are 3 main criteria which determine frequency of testing:

– the risk level of the working environment
– the electrical class of the appliance
– the category of the appliance

The Health and Safety Executive also recommends taking the following into consideration as necessary:

– manufacturer’s recommendations
– the age of the equipment
– frequency of use
– foreseeable misuse of the equipment
– effects of any modifications or repairs
– the history of the item

There are 3 main factors that are taken into account when assessing the electrical risk of a business for PAT testing:
1. The risk level of the environment
2. The type of equipment being used
3. Who will be interacting with the equipment

For example, in an office setting where equipment is relatively static and there is a regular team using it day to day, there is much less risk than on a construction site.

On a construction site, hand-held, potentially dangerous equipment is in regular use and groups of workers tend to switch in and out and therefore the risk is much higher.

Yes, your business can carry out its own PAT tests, as long as the person doing the testing is a ‘competent’ person.
This means they should:

– have adequate knowledge of electricity
– have adequate experience of electrical work
– know how to carry out a visual inspection
– know how to carry out a PAT test
– understand potential hazards & precautions to take when PAT testing
– be able to decide whether it’s safe for PAT testing to continue

If you decide to do your own PAT testing we would strongly recommend taking a PAT testing course as it’s important to perform the PAT tests correctly.

You will also need to invest in some PAT testing equipment. You may have to send this equipment off regularly to be calibrated.