When selecting cable tray accessories, prioritize compatibility with your tray system, material durability (like galvanized steel or stainless steel), and proper load ratings to ensure long-term safety and performance. eferred to support and protect numerous small instrumentation and control cables. Because of its closed design, this type of tray should e used in applications where there is minimal risk of heat generation and buildup. Without the right cable tray fittings and components, issues such as cable damage, overheating, and poor support can arise, affecting the entire electrical system. This guide will help you choose the best cable tray.