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Maximum Operating Voltage |
The maximum voltage the unit can sustain without
damage or failure.
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Mega-Ohm |
A unit of electrical resistance equal to one
million ohms.
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Megger |
A test instrument for measuring the insulation
resistance of conductors and other electrical equipment;
specifically, a mega-ohm (million ohms) meter; this is a
registered trademark of the James Biddle Co.
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Metal-Enclosed Power Switchgear |
A switchgear assembly completely enclosed on all
sides and top with sheet metal (except for ventilating openings
and inspection windows) containing primary power circuit
switching, interrupting devices, or both, with buses and
connections. The assembly may include control and auxiliary
devices. Access to the interior of the enclosure is provided by
doors, removable covers, or both.
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Motor |
A
machine which converts electrical power into mechanical power.
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Motor Control Center |
An assembly of one or more enclosed sections
having a common power bus and principally containing motor
control units.
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Motor-Generator
Set |
A
conversion device consisting of one or more motors mechanically
coupled to one or more generators.
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Motor
Induction Type |
An
alternating current motor, either single phase or polyphase,
comprising independent primary and secondary windings, in which
the secondary receives power from the primary by electromagnetic
induction.
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Motor
Synchronous Type |
An
alternating current motor which operates at the speed of
rotation of the magnetic flux.
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Multioutlet Assembly |
A type of surface, flush, or freestanding
raceway designed to hold conductors and receptacles, assembled
in the field or at the factory.
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