Lightning Protection, Grounding,
& Surge Suppression Glossary of Terms

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Watt
The unit of measure of power equivalent of one joule per second. A watt is equal to the power in a circuit in which a current of one amp flows at a potential of one volt. The abbreviation is W.
Wave Impedance
The ratio of the electric field strength to the magnetic field strength at the point of observation.
Waveform
The graphic depiction of a progressive disturbance propagated from point to point.