This new Fourteenth Edition of ANSI/UL 857 dated September 10, 2025 includes Clarification of the Scope, Clarification of Requirements for Continuous Plug-In Busways, Revision of Minimum Clearance and Creepage Distances for 601 – 1000 V, Define Stabilization for Section 16. This new Fourteenth Edition of ANSI/UL 857 dated September 10, 2025 includes Clarification of the Scope, Clarification of Requirements for Continuous Plug-In Busways, Revision of Minimum Clearance and Creepage Distances for 601 – 1000 V, Define Stabilization for Section 16. All neutrals are 100% capacity. NOTE: All values are for thermal rated busway. Contact Schneider Electric for other options such as low current density rated, harmonic rated, and IP54 rated. 200 Certain fittings are UL rated at 150 kA RMS. This catalog includes information on features, construction, application, installation, electrical data, busbar configuration, wiring diagrams, and dimension drawings for Busway Systems. Powerbus, I-Line, I-Line II Busway, Power-Zone The documentation available online is generally the latest. 1. 1 This Standard applies to service-entrance, feeder, and branch-circuit busways and associated fittings rated at 1000 V or less, 6000 A or less, and intended for use in accordance with the Canadian Electrical Code, Part I (CE Code, Part I), NFPA 70 ®, National Electrical Code® (NEC ®), and the. track busway system, hereafter referred to as Track Busway. Once installed, the Track Busway will provide simp e, versatile, fast and economic means of distributing power. This system was designed to meet the rugged specification of IEC 61439, General Rules & Busway Trunking Systems, with the flexible features of. From data centers and factories to high-rises and hospitals, today's commercial, residential and industrial facilities are perpetually short on capital, space and time.