Which space is classified by building codes for cabling with CMP designation?

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Multiple Choice

Which space is classified by building codes for cabling with CMP designation?

Plenum space. The CMP designation identifies cabling that is specifically rated for use in air-handling spaces, where HVAC systems move air through a building. These environments require cabling with very strict fire and smoke performance, so building codes mandate plenum-rated cable to minimize smoke and flame spread. Other spaces like server rooms, wiring closets, or outdoor trenches are not designated as plenum spaces and use different cable ratings appropriate to those environments, but the CMP label itself signals suitability for plenum air-duct areas.

Plenum space. The CMP designation identifies cabling that is specifically rated for use in air-handling spaces, where HVAC systems move air through a building. These environments require cabling with very strict fire and smoke performance, so building codes mandate plenum-rated cable to minimize smoke and flame spread. Other spaces like server rooms, wiring closets, or outdoor trenches are not designated as plenum spaces and use different cable ratings appropriate to those environments, but the CMP label itself signals suitability for plenum air-duct areas.

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