Which designation is used to mark Class 2 circuits used in environmental spaces air?

Which designation is used to mark Class 2 circuits used in environmental spaces air?

• A. CL2
• B. CL2S
• C. CL2P
• D. CL2R

Answer: (C)

Class 2 cable designations use suffixes to show where the cable is allowed to be installed. The suffix that stands for plenum indicates a plenum-rated jacket, which is required for use in environmental air spaces where air is circulated (like plenums and other air-handling spaces). That rating means the insulation and jacket are tested to limit flame spread and smoke production in those air spaces, making it safe for use there. So the designation with that suffix is the one used for Class 2 circuits in environmental air spaces. The other suffixes designate different installation environments, but they do not indicate a plenum rating, so they aren’t the correct choice for that specific environment.

Class 2 cable designations use suffixes to show where the cable is allowed to be installed. The suffix that stands for plenum indicates a plenum-rated jacket, which is required for use in environmental air spaces where air is circulated (like plenums and other air-handling spaces). That rating means the insulation and jacket are tested to limit flame spread and smoke production in those air spaces, making it safe for use there. So the designation with that suffix is the one used for Class 2 circuits in environmental air spaces. The other suffixes designate different installation environments, but they do not indicate a plenum rating, so they aren’t the correct choice for that specific environment.