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National Electrical Code
Sample test questions for Underground Mine Electrical Certification


Progress Indicator:
Question 1 of 5

1.  Which of the following wiring methods is not approved for use in Class I, Division 1 locations?

Choices:
  1. Threaded rigid conduit
  2. Threaded steel intermediate metal conduit
  3. Electrical metallic tubing
  4. Type MI cable with proper termination fittings