Exam (elaborations)
Chapter 2 Hardware and Materials Used in Residential Wiring Exam Questions and Answers
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Chapter 2 Hardware and Materials Used in Residential Wiring Exam
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Chapter 2 Hardware and Materials Usedin Residential Wiring Exam
American Wire Gauge (AWG) - Answer -A scale of specified diameters and cross
sections for wire sizing that is the standard wire-sizing scale in the United States.
Ampacity - Answer -The current in amperes that a conductor can carry continuously
under the conditions of use without exceeding its temperature rating.
Antioxidant - Answer -A special compound that is applied to exposed aluminum
conductors; its purpose is to inhibit oxidation.
Approved - Answer -When a piece of equipment is approved, it means that it is
acceptable to the authority having jurisdiction (AHJ).
Bimetallic Strip - Answer -A part of a circuit breaker that is made from two different
metals with unequal thermal expansion rates; as the strip heats up, it will tend to bend.
Cabinet - Answer -An enclosure for a panelboard that is designed for either flush or
surface mounting; a swinging door is provided.
Cable - Answer -A factory assembly of two or more insulated conductors that have an
outer sheathing that holds everything together; the outside sheathing can be metallic or
nonmetallic.
Circuit Breaker - Answer -A device designed to open and close a circuit manually and to
open the circuit automatically on a predetermined overcurrent without damage to itself
when properly applied within its rating.
Circular Mils - Answer -The diameter of a conductor in mils (thousandths of inches)
times itself; the number of circular mils is the cross-sectional area of a conductor.
Connector - Answer -A fitting that is designed to secure a cable or length of conduit to
an electrical box.
Copper-Clad Aluminum - Answer -An aluminum conductor with an outer coating of
copper that is bonded to the aluminum core.
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