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Services/Electrical Testing & Inspection

Electrical Testing & Inspection

Don’t take risks and be left in the dark!

Periodic electrical inspection and testing of an electrical installation is vital to protect people and property. Neglect of faulty electrical systems could result in injuries to employees, lost income and fines if found in breach of statutory responsibilities. In some instances it may even invalidate insurance.

Legal responsibility:

Regular periodic inspection and testing is an essential part of ensuring compliance with the requirements of the Electricity at Work Regulations 1989.
  • Owners (or owner’s agents) of an electrical installation have a legal responsibility to prevent death or personal injury from electricity in work activities.
  • The Regulations provide for electrical systems to be maintained in a safe condition so users are protected from electrical shock and fire hazards.
  • Regulation 4 (2) of the Regulations require that all systems and apparatus be maintained where this will prevent danger. It states that regular testing and inspection of equipment is an essential part of any preventative maintenance programme.

When to test:

Periodic Inspection and Testing should be considered:
  • On a change of ownership or tenancy of the premises.
  • On a change of use of the premises.
  • After alterations / additions to the original installation.
  • Because of any significant change in the electrical loading of the installation.
  • Where there is a reason to believe that damage may have been caused to the installation.

Frequency of tests:

Maximum periods allowed between Periodic Inspections:
  • Commercial Installations - 5 years.
  • Industrial Installations - 3 years.
  • Buildings open to the public - 1 year.
  • External Installations - 3 years.
  • Caravan Parks - 1 year.
  • Fire Alarms - 1 year.
  • Short Term Installations - 3 months.
  • Site Installations - 3 months.


CDL’s inspection and testing service is carried out by qualified engineers to provide the reassurance that your electrical system is safe and compliant. We provide a full inspection report and relevant certification.

Testing is undertaken in accordance with BS 7671 2001, the IEE Guidance Note 3 and the Electricity At Work regulations 1989.

Our testing report provides for observations and recommendations on matters adversely affecting electrical safety. Where observations are made, they will be classified according to their importance. Recommendations for any urgent remedial works will be made and a quotation for corrective action will be provided.

Once systems are tested inspected and found to be satisfactory, an approval certificate will be issued.

To take advantage of our periodic inspection and testing service, please complete the ‘survey request’ to receive a no obligation survey of your electrical installation or
Phone 020 7924 4242.