涵盖600 V或以下的配电产品，包括额定电流为100安培或以上的封闭分段预制母线和相关结构和配件，分类如下:馈线母线槽（室内或室外）、插入式母线槽（仅室内）和完成母线槽系统所需的附件。

Covers products for distribution of electric power at 600 V or less, consisting of enclosed sectionalized prefabricated busbars rated at 100 amperes or more and associated structures and fittings, classified as follows: feeder busways (indoor or outdoor), plug-in busways (indoor only) and accessories required to complete the busway system.