TC is an abbreviation for tinned copper, and also the designation for Type TC power and control tray cable.
TC has two meanings in the wire and cable field. As an abbreviation, it stands for tinned copper, a copper conductor coated with tin to aid soldering and inhibit corrosion. As a cable type, Type TC is a power and control tray cable, a factory-assembled multi-conductor cable approved for installation in cable trays. The context makes clear which meaning applies.
Type TC tray cable bundles power, control, and signal conductors in a construction rated and listed for use in the open raceways called cable trays, common in industrial facilities. Tinned copper, the other meaning of TC, describes a conductor finish that improves solderability and corrosion resistance.
In commercial and industrial systems, both meanings of TC are relevant: tinned copper conductors appear throughout cable, and Type TC tray cable routes circuits through tray systems. Recognizing which meaning is intended is part of interpreting specifications accurately.
Because Type TC tray cable bundles power, control, and signal conductors in a construction listed for the open raceways called cable trays, while tinned copper describes a conductor finish, recognizing which meaning of TC is intended is part of interpreting specifications accurately.
At Windy City Wire, an understanding of designations like TC supports clear communication about cable. Recognizing that TC may mean tinned copper or Type TC tray cable helps customers interpret references accurately when specifying conductors and cable for commercial and industrial systems.
TC (tinned copper; also Type TC tray cable)
NEC (National Electrical Code), which defines Type TC tray cable