Frequency of Testing

Frequency of Testing

The frequency of periodic inspection and testing must be determined taking into account:

  1. the type of installation
  2. its use and operation
  3. the frequency and quality of maintenance
  4. the external influences to which it is subjected

The table below provides guidance on the frequency of formal inspections of electrical installations as well as routine checks.

  Type of Installation

  Routine Checks

  Maximum Period Between Inspection & Testing

  General Installation

  Domestic accommodation – general   N/A   change of occupancy/10years
  Domestic accommodation – rented house & flats   1 year   change of occupancy/5years
  Commercial   1 year   change of occupancy/5 years
  Educational establishments   6 months   5 years
  Hospitals – general areas   1 year   5 years
  Industrial   1 year   3 years
  Residential accommodation   1 year   change of occupancy/5 years
  Offices   1 year   5 years
  Shops   1 year   5 years
  Laboratories   1 year   5 years

  Buildings Open To The Public

  Cinemas   1 year   1-3 years
  Church installations   1 year   5 years
  Leisure complexes (excluding swimming pools)   1 Year   3 years
  Places of public entertainment   1 year   3 years
  Restaurants and hotels   1 year   5 years
  Theatres   1 year   3 years
  Public houses   1 year   5 years
  Village halls/Community centres   1 year   5 years

  Special & Specific Installations

  Agricultural and horticultural   1 year   3 years
  Caravans   1 year   3 year
  Caravan parks   6 months   1 year
  Highway power supplies   as convenient   6 years
  Marinas   4 months   1 year
  Fish farms   4 months   1 year
  Swimming pools   4 months   1 year
  Emergency lighting   daily/monthly   3 years
  Fire alarms   daily/weekly   1 year
  Laundrettes   monthly   1 year
  Petrol filling stations   1 year   1 year
  Construction site installations   3 months   3 months