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422.4 Worksheet Questions and Answers Fully Solved R309,31   Add to cart

Exam (elaborations)

422.4 Worksheet Questions and Answers Fully Solved

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  • Course
  • IEC
  • Institution
  • IEC

Exam of 1 pages for the course IEC at IEC (422.4 Worksheet)

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  • October 16, 2024
  • 1
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • IEC
  • IEC
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422.4 Worksheet

In judging equipment, considerations such as the following shall be evaluated.
I. mechanical strength
II. cost
III. arcing effects
IV. guarantee - answer I & III only

Conductors shall be ___ unless otherwise provided in the Code. - answer copper

Conductor sizes are given in AWG or ___. - answer circular mils

Equipment intended to interrupt current at fault levels shall have an interrupting rating at
nominal circuit voltage sufficient for the current that is available ___. - answer at the line
terminals of the equipment

Unless identified for use in the operating environment, no conductors or equipment shall
be located in ___ having a deteriorating effect on the conductors or equipment.
I. damp or wet locations
II. where exposed to gases, fumes, vapors, liquids, or other agents - answer both I and
II

Electric equipment shall be installed in a neat and ___ manner. - answer workmanlike

How would you seal unused knock-outs in panels and boxes? - answer metallic plugs or
plates

___ plugs driven into holes in masonry, concrete, plaster, or similar materials shall not
be used. - answer Wooden

Connection by means of wire-binding screws or studs and nuts having upturned lugs or
equivalent shall be permitted for ___ AWG or smaller conductors. - answer10

Soldered splices must be ___ so as to be electrically secure before soldering. - answer
joined mechanically

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