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Testing & Inspection

All electrical installations are required to be tested to the standards defined by the IEE Wiring Regulations (BS 7671). Depending on the type and purpose of the building, will depend on the frequency to which it is required to be inspected. Testing of your electrical installations should be carried out at regular intervals. Please see the table below for inspection intervals.

Type of installation Routine check sub-clause 3.5 Max period between inspections and testing Reference (key below)
General Installations
Domestic Change of occupancy / 10 years
Commercial 1 year Change of occupancy /5 years 1 & 2
Educational Establishments 4 months 5 years 1 & 2
Hospitals 1 year 5 years 1 & 2
Industrial 1 year 3 years 1 & 2
Residential Accommodation Change of occupancy / 1 year 5 years 1
Offices 1 year 5 years 1 & 2
Shops 1 year 5 years 1 & 2
Laboratories 1 year 5 years 1 & 2
Buildings Open to the Public
Cinemas 1 year 1 to 3 years 2, 6 & 7
Church Installations 1 year 5 years 2
Leisure complexes (excluding swimming pools) 1 year 3 years 1 2 & 6
Places of public entertainment 1 year 3 years 2
Theatres 1 year 5 years 2, 6 & 7
Public Houses 1 year 5 years 1, 2 & 6
Village halls and community centres 1 year 5 years 1 & 2
Special Installations
Agricultural and horticultural 1 year 3 years 1 & 2
Caravans 1 year 3 years 8
Caravan Parks 6 months 1 year 1, 2 & 6
High power supplies As convenient 6 years
Marinas 4 months 1 year 1 & 2
Fish Farms 4 months 1 year 1 & 2
Swimming Pools 4 months 1 year 1, 2 & 6
Emergency lighting Daily / Monthly 3 years 2, 3 & 4
Fire Alarms Daily / Weekly / Monthly 1 year 2, 3 & 4
Launderettes 1 year 1 year 1, 2 & 6
Petrol Filling Stations 1 year 1 year 1, 2 & 6
Construction site installations 3 months 3 months 1 & 2
*Reference Key below…

1. Particular attention must be taken to comply with SI 1988 No. 1057 – Electricity, Safety, Quality and Continuity Regulations 2002 (as amended).
2. SI 1989 No 653 – Electricity at Work Regulations 1989 (Regulation 4 & Memorandum).
3. See BS 5266: Part 1: 2005 Code of Practice for the Emergency Lighting of premises other than cinemas and certain other specified premises used for entertainment.
4. Other intervals are recommended for testing operation of batteries and generators.
5. See BS 5839: Part 1: 2002 Code of Practice for System Design Installation and Servicing (Fire detection and alarm systems for buildings).
6. Local Authority conditions of licence.
7. SI 1995 No. 1129 (clause 27) – Cinematographic (Safety) Regulations.
8. It is recommended that a caravan is inspected and tested annually if it is used frequently (see 721.514.1 and fig. 721 – Instructions for electrical supply).