Question 11021 of 938 · Maryland Journeyperson Electrician Exam
What distinguishes a Class 3 circuit from a Class 2 circuit?
Exactly one answer is correct.
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Correct answer to question 11021
- A: Class 3 allows higher voltage and power levels, so additional safeguards against shock are needed
Explanation
Class 2 circuits are limited so they are safe from both fire and electric shock in most cases. Class 3 circuits operate at higher levels, so they are considered safe from fire initiation but need additional protection against shock.
More questions: Emergency, Limited Energy and Communications
- 11022For most Class 2 power sources, what is the maximum nameplate output?
- 11023May Class 2 conductors be installed in the same raceway as power conductors?
- 11024Where Class 2 conductors are not in a raceway, they must generally be separated from electric light and power conductors by at least what distance?
- 11025In NEC 2020, a Class 1 power-limited circuit is supplied by a source with an output not exceeding what?
- 11026In NEC 2020, Class 1 remote-control and signaling circuits that are not power-limited may operate at up to what voltage?
- 11027In NEC 2020, which article covers Class 1, Class 2, and Class 3 remote-control, signaling, and power-limited circuits?