Recommended Initial Frequencies of Inspection of Electrical Installations*

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Type of Installation

1

Routine check
Sub-clause 3.5

2

Maximum period
between inspections and
testing as necessary

3

Reference
(see key below)

4

General Installation

     
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 at occupancy change /
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 1-3 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 1,2,6
Restaurants and hotels 1 year 5 years 1,2,6
Theatres 1 year 3 years 2,6,7
Public Houses 1 year 5 years 1,2,6
Village halls/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
Highway 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 2,4,5
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

  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 635 – 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) – Cinematograph (Safety) Regulations
  8. It is recommended that a caravan is inspected and tested annually it if is used frequently
    (see 721.514.1 and Fig. 721 – Instructions for electricity supply)

*Reproduced courtesy of the Institute of Engineering and Technology

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