Under British Standards 7671 - Requirements for Electrical Installations the recommended frequencies of testing electrical installations are as follows.

1. Domestic - maximum period...on change of occupancy or 10 years.

2. Commercial - maximum period...on change of occupancy or 5 years.

3. Residential Accommodation - maximum period...5 years and a routine check (*sub clause 3.5) change of occupancy or every year.

NB. there are many other types of installation requiring varying degrees of test and inspection procedures. Please contact us for advice.

*Routine checks (sub clause 3.5) electrical installations should not be left without any attention for the period between inspections. In normal domestic premises (owner occupiers) it is presumed that the owner will soon notice any breakages or excess wear and will arrange for appropriate repairs to be carried out. In other situations such as a let/residential accommodation arrangement should be made to monitor breakages and wear and tear. These routine checks need not be carried by an electrically qualified person but by somebody competent enough to use the installation and recognise defects. This requirement is to compliment the periodic inspection and test.

Routine Maintenance

As an alternative to a periodic inspection and test you can incorporate the routine checks with a planned itinerary of tests and inspection for particular circuits every year negating the need for a full periodic every five years. Certain site conditions must apply.

Periodic Test and Inspection

The inspection includes a check on the condition of all electrical equipment and material (as part of the fixed wiring installation) with particular regard to the following.

1. safety
2. wear and tear
3. corrosion
4. damage
5. overloading
6. age
7. external influence
8. suitability

A periodic inspection report includes the following.

1. a description of the extent of the work, including the parts of the installation inspected and details of what the test and inspection covered.
2. any limitations that may have been imposed during inspection and testing of the installation.
3. details of any damage, deterioration, defects and dangerous conditions  and any non compliance with BS7671 that may give rise to danger.
4. a schedule of inspections.
5. a schedule of test results.

Persons conducting a periodic inspection and test report should be competent  and qualified to a minimum City and Guilds Level 3 BS2391 Inspection and Testing qualification.