Zinc rich coating is a common process used for this type of part, and requires only a temperature of 280°C (536°F) or less, either by centrifuging or spraying. Cable trays play a critical role in electrical systems, offering sturdy support and reliable protection for cables in various environments. In this article, we'll explore the. Legrand's offer of global solutions for wiremesh cable trays (and accessories) is one of the most complete on the market. Steel coated with a hybrid epoxy-polyester resin. One of the most important factors to consider when choosing a cable tray is the type of coating.