High voltage lines can be used to transmit R. F. carrier signals for the purposes of voice communication, remote signaling and control. The frequency range from 30 to 500 kHz has proven to be advantageous for high frequency carrier transmission. Line trap
A rubber dielectric cover for conductor that is used to electrically isolate a worker from an energized conductor. Line hose is made by W.H. Salisbury & Company.
The upper limit of the output current which cannot, by design be exceeded under any conditions.
An approach limit at a distance from an exposed live part within which a shock hazard exists.
A protective device used to open or close electrical circuits when certain limits, such as temperature or pressure, are reached.