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Electrical Engineering Terms D

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Demarcation Point.

The term demarcation means the setting or marking of boundaries or limits. Demarcation point is the service point where the electrical-utility power transmission/distribution grid with installation governed by the NESC (National Electrical Safety Code) stops, and the electrical power distribution system for a building or other structure (premise electrical-power distribution system) with installation governed by the NEC begins.

Dielectric / Dielectric Strength.

A dielectric is an insulator.  Dielectric strength relates to the maximum voltage that a given insulation can withstand without breaking down.

Difference of Potential / Potential Difference.

The voltage created between two points in an electrical system separated by an open circuit or other impedance when supply power is applied. The voltage measured across a circuit or circuit component is often referred to as the potential difference as well.

Double-Insulated / Ungrounded Tool.

Any of several ungrounded electrical tools that are constructed so that the case, normally made of a nonconductive material, contains a second type of insulation from electrical energy.

 Dielectric

An insulating material between the plates inside of a capacitor.

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About Ahmed Faizan

Mr. Ahmed Faizan Sheikh, M.Sc. (USA), Research Fellow (USA), a member of IEEE & CIGRE, is a Fulbright Alumnus and earned his Master’s Degree in Electrical and Power Engineering from Kansas State University, USA.

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Electrical Engineering Terms E

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