Find Cable Trays on GlobalSpec by specifications. certification requirements and applications. 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. Note: All trough cable trays are greater than 4" in width. User may specify either, both, or neither of the "At Least" and "No More Than" values. Depth available for cable loading. Browse or download the cable tray catalog for more information on our full line of cable tray and ladder systems. Cable tray systems are the perfect solution for running large quantities of power or data cables overhead or under-floor.