The wiring methods that may be used in zone-classified areas are the same as those permitted in areas classified by divisions. However some wiring some wiring:
For example, RMC (rigid metal conduit) may be used for circuits that are not intrinsically safe in Class I, Division 1 areas but only intrinsically safe wiring and apparatus is permitted in Zone 0 areas. that may be suitable for Division 1 may not be permitted in Zone 0, even though Division 1 includes the Zone 0 areas.

NOTE: This is an unformatted excerpt from our online fire protection training library.