In 1984 BS1363 was amended with a requirement that the line and neutral pins should have an insulation sleeve. 30 plus years later, equipment fitted with non-sleeved plugs is still found in use. What should you do if you find an non-sleeved plug during a PAT inspection?
Plugs sold in the UK have been covered by statutory legislation since 1987. This legally requires them to meet the BS1363 British Standard. However the legislation is not retrospective, it does not apply to old plugs already in use. There is no requirement to replace non-sleeved plugs. (IET Code of Practice, page 138, table VII.1 section 15)
As with many aspects of the inspection and testing process, a common sense approach is needed. For example, a non-sleeved plug found in a school, where small fingers could easily make contact with pins. If you follow the recommendations in the IET Code of Practice there is no requirement to change the plug. My advice would be to change it.
If you decide not to replace a non-sleeved plug during the PAT testing, it’s worth bearing in mind that it will be at least 30 years old. There’s a good chance that it will have suffered some damage in it’s lifetime. Thoroughly inspect it to make sure there are no cracks, damage, loose or bent pins etc. If in any doubt, replace it.
Non-sleeved plugs must be replaced on equipment that is hired out, second-hand equipment offered for sale, or appliances that are included in rental accommodation. This equipment is covered by the Plug & Sockets etc. (Safety) Regulations 1994. These regulations apply to all electrical equipment supplied during the course of a business.
For more information on BS1363 and UK plugs, this Wikipedia entry has extensive information: http://en.wikipedia.org/wiki/AC_power_plugs_and_sockets_-_British_and_related_types
We should also mention earth-sleeved plugs! This shouldn't be confused with the plastic ISOD (Insulated Shutter Opening Device) found on some Class 2 appliances. This counterfeit plug is connected to a three core Class 1 cord set. The sleeve prevents the earth pin making contact in the socket; as such the appliance will not be earthed. These types of plugs are regularly found during PAT inspections and are still widely sold on sites like Ebay.
I recommend anyone carrying out PAT testing takes a look at this site: www.bs1363.org.uk. It has some excellent information on counterfeit plugs.