Alltec Protection Systems Pvt. Ltd. Becomes the First Company in India to be Certified by Underwriters Laboratories in the Installation of Lightning Protection
A standard governing the use of electrical wire, cable, and fixtures installed in buildings.
Negative Lightning
A cloud-to-ground discharge which begins in a negative region of the cloud and effectively lowers some tens of coulombs of negative charge to the earth. Over 90% of all cloud-to-ground lightning strikes are of this type.
NEMA
National Electrical Manufacturers Association.
Neutral
The ac power system conductor which is intentionally grounded on the supply side of the first service disconnect (ing) means. It is the low potential (white) side of a single-phase ac circuit or the low potential fourth wire of a three-phase wye distribution system. The neutral (grounded conductor) provides a current return path for ac power currents whereas the grounding (or green) conductor does not, except during fault conditions.
Nominal System Voltage
A nominal value assigned to designate a system of a given voltage class.
Nonlinear Load
A load that draws a nonsinusoidal current wave when supplied by a sinusoidal voltage source. (IEEE Std 519)
Notch
A switching (or other) disturbance of the normal power voltage waveform, lasting less than a half-cycle, which is initially of opposite polarity than the waveform, and is thus subtractive from the normal waveform in terms of the peak value of the disturbance voltage. This includes complete loss of voltage for up to a half-cycle. See also: Transient.
