Electrician NCCER Study Set with Questions and Correct Answers

Which article of the NEC covers grounding? Article 250 What is a dropout plate? Metal plate with a curve surface for cable to follow as it passes from the tray All of the following are common service voltages in the United States Except: 372/575 3-Phase, 4-wire What does a GFCI breaker do? Opens a circuit to prevent operation of an electrical device What will happen when one or more coils in a winding are grounded? The motor will automatically blow fuses eight incandescent lighting fixtures are to be installed. Each fixture is 120 volts, with a 200-whatt lamp what is the total connected load? 13.3 Amps The __________must be grounded in a bussed glutter if use as the main service equipmemt Neutral busbar When wall mounting cable tray, ensure that The building structure is strong enough to support the tray system The purpose of sealing cable ends when reels of cable are in storage is ______________ to keep moisture from creeping in The outer covering on liquid-tight flexible metal conduit is use for A moisture seal A good electrical connection should Be mechanically and electrically secure The symbol normally use for duplex Circle with two parallel lines draw through it Disconnecting means are covered in NEC section 110-22 In relation to switches, the term throw refers to the Number of internal operations that switch can perform A 3-phase, 4-wire, 480v service requires ________ current transformers 3