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    A method of control by which the motor drives through an electrical induction load brake.

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    The percentage of force transmitted through these components that is not lost to friction.

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    An electrically operated machine for lifting, lowering and transporting loads, consisting of a movable bridge carrying a fixed or movable hoisting mechanism and traveling on an overhead runway structure.

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    A method of controlling crane motor speed when in an overhauling condition, without the use of friction braking.

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    A conductor or group of conductors substantially enclosed to prevent accidental contact.

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    A housing to contain electrical components, usually specified by a NEMA classification number.

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    The minimum horizontal distance between the crane hook (s) and a referent point in a building or supporting structure.

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    A fixed steel structure capable of stopping the crane at full speed.

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    A structural member other than the end truck which connects the ends of the girders to maintain the squareness of the bridge.

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    The unit consisting of truck frame, wheels, bearings, axles, etc., which supports the bridge girders.

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    A crane designed using specially constructed electrical components to prevent the ignition of hazardous materials in the surrounding atmosphere, by containing any explosions that may occur within the components.