Periodic testing and inspection of your electrical installation is an essential part of electrical maintenance. If you suspect that there is a problem with your electrical installation it is important to ensure that any fault is identified and rectified as soon as possible to ensure that the problem does not deteriorate which could incur further costs than necessary. It is a requirement for rental properties to have their electrical installation tested and inspected periodically. For most private homeowners it is recommended that you have your property tested at 10 year intervals in order to maintain the safety and integrity of your installation.. For landlords, HMO’s and other dwellings it is a mandatory requirement to have rental properties checked at a minimum of 5 years intervals, depending on the property and its intended use. Failure to observe this can potentially have serious consequences and may affect your insurance.