HELIX - Something spiral in form; a coil formed by winding wire around a uniform tube; a curve traced on a cylinder or cone by the rotation of a point crossing its right sections at a constant oblique angle.
HENRY - The unit of measure of inductance. It is defined as the inductance of a circuit in which a counter electromotive force of one volt is generated when the current is changing at the rate of one ampere per second. Abbreviation H.
HERTZ - A term replacing cycles per second as an indication of frequency. Abbreviation Hz.
HF - a) Heavy Formvar Magnet Wire. Soft bare copper wire with baked synthetic insulation overall. b) Abbreviation for high frequency. See frequency band.
HF/LSLS/LT - Abbreviation for halogen-free, low smoke, low toxicity.
HI-POT (HIGH POT) - A test designed to determine the highest potential that can be applied to a conductor without breaking through the insulation.
HIGH FREQUENCY - See frequency band.
HIGH TENSION - See high voltage. Abbreviation HT.
HIGH VOLTAGE - A wire or cable with an operating voltage over 600 volts.
HL - CSA mark used to identify cables which comply with the Hazardous Location performance requirements of CSA C22.2 No. 174 specification.
HMWPE - Abbreviation for high molecular weight polyethylene.
HOOK-UP WIRE - A wire used for low current, low voltage (under 1,000 volts) applications within enclosed electronic equipment, usually 12 AWG and smaller.
