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You are here:: Home » Electrical Services » Wiring Inspections » Wiring Inspections - When »

How often should the wiring in our building be tested?

The inspection intervals vary greatly depending upon the use of the electrical installation, and whether the premises are used by members of the general public. 

As a rough outline, the following information has been provided in Guidance Note 3, of BS 7671 The Requirements for Electrical Installations 2008.

Our staff can provide advice on inspection intervals and the costs relating to inspection of your premises.

Suggested intervals between Periodic Tests and Inspections

Type of installation Maximum period between inspections
Domestic premises 10 years
Commercial premises 5 years
Educational establishments 5 years
Hospitals 5 years
Industrial premises 3 years
Cinemas 1 year*
Churches 5 years
Leisure complexes 1 year
Places of public entertainment 1 year
Theatres, etc. 1 year*
Agricultural and horticultural 3 years
Caravans 3 years
Caravan sites 1 year*
Emergency lighting 3 years
Fire alarm systems 1 year
Launderettes 1 year*
Petrol filling stations 1 year*
Public Houses 5 years
Marinas 1 Year
Highway power supplies 6 years
Temporary installation 3 months
Where maximum periods are marked * there is
a legal requirement for retests at these intervals
 
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