The main components of a cable tray system include tray sections, fittings, supports, and accessories. The selection of material and finish is a function of the environment in wh tant in a wide range of environments, and easily formable (Appendices II and III). Whether specifying a major new project, refurbishing existing facilities or doing the engineering, procurement and construction (EPC) for your end user, with T&B Cabletray, ABB offers reliable so utions du g conforming to ASTM A123 & ISO 1461 : m. Cable tray fitting accessories, also known as cable tray accessories, are a wide range of components used to connect, support, or change the direction of mathed cable trays.