This publication sets out the requirements for above ground cable installation systems for high voltage ac and 1500 volt dc traction cables including cable trays, cable ladders, ducts and conduits. Aerial and. Cable trays are a common method for organizing and supporting cables in various settings, but what about high voltage cables? Can they be safely installed in cable trays? In this comprehensive guide, we'll explore the considerations, regulations, and best practices surrounding the installation of. OZLEC is a leading provider of specialised electrical services, delivering high and low voltage cable installation and haulage solutions across Australia. Trusted on complex and large-scale infrastructure, we bring precision, safety, and reliability to every project — no matter the environment. Aerial and underground systems are excluded. Cable trays offer continuous support of cables, are lightweight, quick and straight forward to install just about anywhere, and generally mean that changing cabling. From anchoring solutions for transformers and heavy equipment to installing supports for high-voltage cables, we offer rigorously tested, reliable systems used in substation projects globally.