ELE 137 Quiz 12

1066

Low-voltage power circuit breakers are listed under UL Standard ____.

in parallel

A dual-element, time-delay fuse has one or more fusible elements (links) connected ____.

maximum

An interrupting rating is a(n) ____ rating, which is a measure of the fuse's or circuit breaker's ability to safely open an electrical circuit under fault conditions, such as an overload, short circuit, or ground fault.

H

Class ____ fuses formerly were called NEC® or Code fuses.

250

For motor branch circuits, the maximum setting of a conventional inverse-time circuit breaker must not exceed ____ percent of the full-load current of the motor

600

Fused switches are available in ratings of up to ____ amperes in both 250 and 600 volts.

Solid neutral

In the case of a delta, 3-phase, corner-grounded "B" phase system, a device called a ____ can be installed in the "B" phase.

R

The Class ____ fuse is a nonrenewable cartridge type and has a minimum interrupting rating of 200,000 RMS symmetrical amperes.

interrupting capacity

The terms interrupting rating and ____ are used interchangeably in the electrical industry, but there is a subtle difference

Straight current-limiting

When compared to other types of fuses, the ____ fuse has the lowest energy let-through values.