Cable trays and busways at floor level or at slab penetrations shall have a waterstop no less than 50 mm in height. At slab penetrations, provide 20–30 mm of firestopping and install a fire-support plate at the top. Sealing shall be tight and reliable, without visible cracks. The NSAI will publish the 5 th Edition National Rules for Electrical Installations, IS 10101:2020 (hereafter “the new standard”) on 6 March 2020. The CRU is the body responsible for regulating restricted and controlled. IS 10101 of 2020 gives a comprehensive set of requirements for the requirements for design and installation of electrical at voltages of 1000 Volt AC and below. This document outlines the key requirements for cable tray layout, installation, and fireproofing in industrial and commercial environments. Relevance: NEC Article 392 covers cable trays, including sizing, support, and separation requirements.
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