Which statement describes the relationship between CL2/CL3 and CL2P/CL3P cables?

• A. CL2/CL3 are general-purpose cables; CL2P/CL3P are plenum-rated cables.
• B. CL2/CL3 are plenum cables; CL2P/CL3P are general-purpose.
• C. CL2/CL3 have higher voltage ratings than CL2P/CL3P.
• D. CL2/CL3 are used only for outdoor installations.

Answer: (A)

The main idea is that the “P” in CL2P and CL3P stands for plenum-rated. Plenum spaces—like drop ceilings and air ducts—require cables with jackets that limit smoke and toxic fumes if they burn. CL2P and CL3P meet those plenum standards, so they can be used in those spaces. CL2 and CL3, on the other hand, are general-purpose cables and are not designed to meet plenum-smoke/flame requirements, so they’re typically used in non-plenum locations. The voltage ratings are essentially the same within each pair, with the plenum versions simply adding the plenum-rated jacket requirement. So the statement that CL2/CL3 are general-purpose cables and CL2P/CL3P are plenum-rated correctly describes the relationship.