Make more accurate assessments of smoke and fire spread in plenums using the test method presented in NFPA 262.

Referenced by both NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, and NFPA 70®, National Electrical Code®, and vital for testing labs, NFPA 262, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces, presents a test procedure to evaluate the potential for fire spread along cables and wires housed in a plenum or other environmental space.

The test method lets you measure and record both flame travel distance and optical density of smoke for:

• Electrical wires and cables that are insulated, jacketed, or both
• Optical fiber cables for installation in plenums and other spaces used to transport environmental air without being enclosed in raceways

  Annexes include a wealth of helpful information on topics such as smoke and heat release measurements and standard reference cable test.

Changes to the 2023 edition of NFPA 262 include:

• Editorial corrections for improved accuracy
• Updated references throughout