A lightning protection system for a particular building should be considered at the design stage by the owner of the building in consultation with the design team. The person responsible for the design of the system is the electrical engineer. The considerations revolve around the intended use of the building, its contents, including the number of people and equipment, the prevalence of lightning strikes and the height or isolation of the structure. This "Technical Note" outlines the British Standard with regard to building and contents protection, and considers in more detail the protection of the electronic and electrical equipment which is common-place in the modern office and in production facilities - primarily computers, but also telephones, fax machines, modems, fire alarms, burglar alarms and building energy management systems. It also outlines the other approach to this problem which tries to ensure that electronic and electrical equipment is made to be resilient to voltage surges so that, for example, it could tolerate a surge in the mains voltage caused by a lightning flash a-kilometer-distance away.
This is also under international discussion, but will come into British law under the umbrella of the Electromagnetic Compatibility Regulations 1992 (Reg. 8) as standards are agreed in Europe.