Fixed Wiring Inspection

Electrical Mains Installation Periodic Inspection 

Why do we need to inspect & test the electrical Installation?

Most things unfortunately deteriorate with age and an electrical installation is one of them. For this reason, to ensure safety to yourself and others and compliance with the Law it is necessary that the electrical installation is inspected and tested at suitable intervals.

What are the legal Requirements?

The Health & Safety at Work Act 1974 (HASW 1974) is an Act set by Parliament that places a duty of care on Employers & Employees to ensure the safety of all persons using the work premises. This Act is law, and to contravene this law is a criminal offence.

As HASW 1974 is an “enabling act” it does not enter into detail of how you will achieve compliance but looks to other Regulations to achieve it. 


Firstly, “The Management of Health & Safety at Work Regulations 1999” which places a duty on Every employer to make a sufficient assessment of the risks to health and safety of employees while at work and to all other persons while carrying out their work.

Of the assessed risks for any electrical equipment or installation, it is quite likely that the number one hazard would be that of an electric shock with the risk arising from poorly maintained installations that have deteriorate with age, clearly being a fire hazard.

The Electricity at Work Regulations 1989 (EAWR 1989) As it’s title suggests, is specifically an electrical regulation set and requires all necessary precautions to be taken against the risk of Electric Shock. Regulation 4(2) states “As may be necessary to prevent danger, all systems shall be maintained so as to prevent, so far as is reasonably practicable such danger”

Regulation 4 then details how this will be achieved with maintenance and regular inspection.

Also, as Portable and fixed equipment relies on the integrity of the electrical installation, the requirements of The Provision and Use of Work Equipment Regulations 1998 (PUWER 98) requires that the installation is inspected and tested at suitable intervals.

What sets the standard for the Inspection & Test?

In the UK all electrical installations are designed, constructed & tested to the requirements as set out within the IEE Wiring Regulations BS7671.

Carrying out the inspection to the current version of BS7671 will ensure that your electrical installation and your company Health & Safety Policy meet your statutory requirements. 

How frequently should the installation be Inspected & Tested?

The Institute of Electrical Engineers (IEE) give guidance for the “recommended” frequencies for the inspection & test of most electrical installations, with 3 & 5 years recommended for most commercial & industrial type premises.

However, consideration will need to be given to other factors that may require a more frequent testing regime. A careful assessment of your installation and it’s use should be conducted to help determine this frequency.

Site Survey

COBA Electrical Services can often quote over the telephone, given that you can provide some basic information. e.g. - building type (commercial/industrial), location, No. of employees, No. of distribution boards (consumer units) and No. of occupied ways (circuits).

If you are unable to provide the information above or are not sure, then please contact us. If appropriate, we will always arrange to visit you.