During PAT Testing, different tests are carried out depending on the Class of equipment.
PAT Testing of appliances is slightly differently to that of power cords. This article
looks at some examples of PAT Testing.
One aspect of electrical appliances that tends to cause a lot of confusion is the
question "What fuse should this appliance have?" In this article, we look at fuses
in detail and give guidelines on how to work out the correct fuse for the appliance.
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This test is carried out on all Class I appliances during PAT Testing. The purpose
of the test is to check that there is a good connection between the Earth pin on
the plug and the case of the appliance. A good connection is defined as having a
resistance of less than 0.1 ohms (or 100 milli-ohms).
This test is carried out on Class I and Class II appliances during PAT Testing. The
purpose of this test is to ensure that there is adequate insulation between the Live
parts of the appliances and the user touchable metal parts. Adequate insulation is
defined as greater than 1 M ohm for Class I appliances and 2 M ohm for Class II appliances.
Electrical appliances start off perfectly safe, but with use can deteriorate to an
extent where there is a risk of an electric shock or a fire. Just as regular MOT
checks ensure the safety of cars on the road, Portable Appliance Testing (or PAT
to use the popular acronym) ensures that electrical appliances continue to be safe
Bill, owner/manager of a 40-room Hotel currently spends some £800 a year on a sub-contractor
to carry out Portable Appliance Testing. The testing takes place over 2 days and
gaining access to all the rooms can cause problems. He wants to investigate the possibility
of this being done in-house to reduce costs and allow flexibility in the timing of
the tests. However he is keen not to fall foul of the regulations.
It is important to inspect and carry out PAT Testing on used electrical appliances
prior to offering them for resale. In addition to this there are other precautions
that need to be taken and these are presented in this chapter.
Wiring a plug is not difficult but you would be surprised how often people get it
wrong. A wrongly wired (or fused) plug puts everyone at risk from electric shock
or fire.Eight simple steps to a well wired plug:
A new in depth, one day PAT testing workshop is proving a hit with delegates who
have been able to use the skills learnt on the course to win new clients and generate
additional income for their businesses.