Electrical Testing Intervals: A Quick Guide
All electrical installations can deteriorate with age and use. Regular electrical safety testing, conducted by a registered electrical contractor is therefore essential to ensure that electrical equipment and installations remain safe.
How often do I need to test my Electrical Installation?
The guidelines vary between different types of electrical installation. Domestic, industrial and commercial electrical installations command a different recommended schedule. There are also variations depending on the environment where the installation is used, with public facilities often requiring more regular inspection.
The table below provides guidance on the frequency of formal inspections of electrical installations as well as routine checks:
Type of Installation
Maximum period between
|Domestic accommodation –
Domestic accommodation –
rented houses and flats
|change of occupancy/10 years
change of occupancy/5 years
|Commercial||1 year||change of occupancy/5 years|
|Educational establishments||6 months||5 years|
|Hospitals and medical clinics –
Hospitals and medical clinics –
|Industrial||1 year||3 years|
|Residential accommodation (Houses of
Multiple Occupation) – halls of residence,
nurse’s accommodation, etc.
|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|
(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 and specific installations
(for medical locations see above)
|Agricultural and horticultural||1 year||3 years|
|Swimming pools||4 months||1 year|
|Highway power supplies||as convenient||6-8 years|
|Marinas||4 months||1 year|
|Fish farms||4 months||1 year|
|Emergency lighting||daily/monthly||3 years|
|Fire alarms||daily/weekly||1 year|
|Petrol filling stations||1 year||1 year|
|Construction site installations||3 months||3 months
For many businesses, ensuring compliance in the face of increasingly complex regulation and codes of practice can be something of a challenge.
Mobius can take care of all your compliance and maintenance needs, including electrical testing, ensuring that you don’t fall foul of legislation and that you protect the health and safety of your employees, customers and the wider public.
Talk to us about your fit out requirements today