CHROMEL®-ALUMEL® - The alloy used in making Chromel-Alumel® thermocouple wires. Chromel® is an alloy of nickel and chrome plus nine other elements. Alumel® is an alloy containing nickel, manganese, aluminum, silicon, and nine other elements. Chromel® is nonmagnetic; Alumel® is highly magnetic. Chromel® and Alumel® are trademarks of the Hoskins Mfg. Co.
CHROMIUM - A blue-white metallic element found naturally only in combination and used in alloys and in electroplating.
CIRCUIT (ELECTRIC) - The complete path of an electrical current. When the continuity of the circuit is broken, it is called an open circuit; when continuity is maintained, it is called a closed circuit.
CIRCUIT SIZES - A popular term for building wires sizes 14 through 10 AWG.
CIRCULAR MIL - A term universally used to define cross sectional areas of conductors. It is an area (7.854 x 10 sq. in.) equal to the area of a circle one-thousandth (10-3) of an inch in diameter. As the number of circular mils increases, the size of a wire increases. Abbreviation CM.
CL2 - Abbreviation for Class 2 cable.
CL2P - Abbreviation for Class 2 plenum cable.
CL2R - Abbreviation for Class 2 riser cable.
CL2X - Abbreviation for Class 2 cable, limited use.
CL3 - Abbreviation for Class 3 cable.
CL3P - Abbreviation for Class 3 plenum cable.
CL3R - Abbreviation for Class 3 riser cable.
