There is not a statutory period for completing electrical safety inspections or maintenance. There are several authoritative documents that suggest suitable intervals including:

 However, the code of practice for in-service inspection and testing of electrical equipment, states:

The same document also provides guidance on the frequency of inspection for various situations ranging from construction sites to offices and shops. An examination of this guidance would suggest that each individual case / premises must be assessed to ascertain it's likely inspection schedule should be.

Therefore G.M.Crozier Electrical recommends an inspection and testing frequency of 12 months for most equipment and depending on the environment and usage a smaller frequency of 1 month or 6 months be used.

The guidance contained in the "iee code of practice for in-service inspection and testing of electrical equipment" refers to electrical appliances rather than fixed installations although the document does state: "similar procedures must be followed for the fixed installation".

IEE guidance note 3, inspection and testing provides guidance on the inspection, testing and maintenance required for fixed installations. This document places a general requirement for a "routine check" on commercial properties of 1 year with a more thorough examination including inspection and testing every 5 years, or at change of tenancy. G.M.Crozier Electrical recommends an annual inspection that is more rigorous than the "routine check" but should obviate the need for a more thorough 5 yearly inspection.

Once a client has established the need to test the decision on the level of testing required is a technical matter adequately covered by IEE documentation. There is also an array of specialist equipment designed specifically to complete IEE test regimes for portable and fixed electrical equipment.

G.M.Crozier Electrical adhere to the guidance on portable appliance testing and expand on the annual "routine check" for fixed installations by carrying out electrical tests to confirm correct wiring, correct earthing and the correct operation of safety devices.

As with almost all safety legislation, the person required to carry out electrical checks must be a competent person. Competency is judged on a combination of training, knowledge and experience. G.M.Crozier Electrical inspection engineers are qualified engineer surveyors with over 10 years experience of electrical installation and testing work.