[H]

Henry - Unit of inductance such that the induced voltage in volts is numerical equal to the rate of change in current in amperes per second.

Hermetically Sealed - a gaslight enclosure that has been completely sealed by fusion or other comparable means.

Hertz (Hz) - a term replaced cycles-per-second as a unit of frequency.

Heterogeneous Insulation - A cable insulating system composed of two or more layers of different insulating materials.

Hi Pot - a test designed to determine the highest voltage that can be applied to a conductor without electrically breaking down the insulation.

High Voltage - generally, a wire or cable with an operating voltage of over 35,000 volts.

Homogeneous Insulation - A complete cable insulation structure whose components cannot be identified as layers of different materials.

Hook-up Wire - a single insulated conductor used for low current, low voltage (usually under 600 volts) applications within enclosed electronic equipment.

Hot Tin Dip - a process of passing bare wire through a bath of molten tin to provide a coating.

Hygroscopic - capable of absorbing and retaining moisture.

Hypalon - DuPont's trade name for their chlorosulfonated polyethylene, an ozone resistant synthetic rubber.

Hz - Abbreviation for Hertz.