A detailed test procedure is provided for determining the ampacity or derating factor in the following cable installation configurations: block-out or sleeve type cable penetration fire stops; conduits covered with a protective material; tray covered with a protective material; cable directly covered or coated with a fire-retardant material; and free-air drops enclosed with a protective material.

This standard provides a detailed test procedure for determining the ampacity or derating factor in the following installation configurations: 1) Block-out or sleeve type cable penetration fire stops. 2) Conduits covered with a protective material. 3) Tray covered with a protective material. 4) Cable directly covered or coated with a fire-retardant material. 5) Free-air drops enclosed with a protective material.

The purpose of this standard is to provide a test procedure for use in establishing the ampacity or ampacity derating factor for cables installed in fire protected conduits, trays, or free-air drops, cable penetration fire stops, or electrical separation wrap systems.