Find the listing
TC or TC-ER appears in the legend, often with the voltage class and the conductor count. TC-ER adds an exposed-run rating, which widens where the cable can be installed.
Count the conductors
Tray cable carries two to thirty-seven conductors under one jacket. Control cable looks similar but is usually rated and listed differently, and instrument tray is built in pairs.
Check for armour
MC has an interlocking metal armour; tray cable has a jacket. If you can see aluminium strip, it is metal-clad, not tray cable.
Note the voltage class
600 V and 2 kV tray constructions are both common in Texas plants, and the class changes both the application and the price.
