Specifies requirements for busbar trunking systems (busways) for use on systems with rated voltages up to 1000 Hz, or 1500 volt d.c. Applies to busbar trunking systems and their accessories for feeding and distributing electrical power in residential, retail, public, agricultural and industrial premises. Also applies to busbar trunking systems designed to incorporate communications and/or control systems or intended to supply luminaires through tap-off units. This Standard is identical with and has been reproduced from IEC 60439-2:2000.