Establish performance characteristics for surge protective devices connected to low-voltage AC power circuits. Develop and recommend standard methods for testing and rating surge protective devices. Recommend standard methods for test specifications and ratings for low voltage AC surge protective devices. New IEEE Standard - Superseded. This standard establishes methods for testing and measuring the performance characteristics for surge-protective devices used in low-voltage ac power circuits. Definitions are stated that apply specifically to surge-protective devices. The testing requirements are categorized into two groups, in which a minimum set of basic tests (BTs) are prescribed for all surge-protective devices within the scope of its documents, supplemented by additional tests (ATs) that might be needed to establish particular application requirements.