What is the proper marking for Class 2 wires for use in environmental air spaces?

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Multiple Choice

What is the proper marking for Class 2 wires for use in environmental air spaces?

Explanation:
Plenum-rated cabling is required for installation in environmental air spaces, because it must limit smoke and flame spread in air-handling paths. The designation CL2P shows a Class 2 circuit with a plenum-rated jacket, meaning it’s approved for use in those spaces. The P is the key indicator that the cable meets plenum requirements. A plain CL2 lacks that plenum designation, so it wouldn’t be suitable for plenums. Adding R or PR would imply riser or combined ratings that aren’t necessary for this scenario, and aren’t the standard marking for environmental air space use. So the correct marking is CL2P.

Plenum-rated cabling is required for installation in environmental air spaces, because it must limit smoke and flame spread in air-handling paths. The designation CL2P shows a Class 2 circuit with a plenum-rated jacket, meaning it’s approved for use in those spaces. The P is the key indicator that the cable meets plenum requirements. A plain CL2 lacks that plenum designation, so it wouldn’t be suitable for plenums. Adding R or PR would imply riser or combined ratings that aren’t necessary for this scenario, and aren’t the standard marking for environmental air space use. So the correct marking is CL2P.

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