Both visual inspections and instrument tests are carried out in accordance with guidelines and testing procedures laid down in the current IEE Code of Practice for In-service Inspection and Testing of Electrical Equipment (Ver 4).

Frequency of Electrical Tests

Visual Inspection
Every portable appliance is visually inspected to check the plug, fuse rating, flex and body of the appliance.

After the visual inspection, set tests are carried out using Portable Appliance Testing equipment.

In the testing procedure the following tests are conducted, as appropriate.

On completion of these tests either a PASS or FAIL sticker will be placed on the appliance showing the date of the test and appliance reference.
About 15-25 items can be tested per hour, by an experienced engineer, if all the checks and necessary tests are being done thoroughly.

Regular checking of equipment is also essential (by the users and the responsible person) and most dangerous defects in electrical appliances can be identified by carrying out these simple checks. 
1) there are no cuts or abrasions in the cable covering (sheath)
2) the outer covering of the cable is gripped by the cord grip in the plug top, so that no coloured cable cores are visible from outside of the plug
3) the plug has no cracked casing or bent pins
4) there are no signs of overheating or burning, particularly at the plug and socket
5) there are no loose parts or screws
6) no part of the appliance is damaged or missing