NFPA 262:2023

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Application. 6.4 Smoke Measurement System Calibration Test. 6.5 Fuel. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. (Reserved) 2.3 Other Publications. 2.4 References for Extracts in Mandatory Sections. (Reserved) Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 Test Apparatus 4.1 Fire Test Room. 4.2 Fire Test Apparatus. 4.3 Fire Test Chamber Airflow System. 4.4 Ladder Cable Tray. 4.5 Fire Test Chamber Temperature Measurement Instruments. 4.6 Data Acquisition Equipment. Chapter 5 Test Specimens 5.1 Specimens. Chapter 6 Maintenance and Calibration of Test Equipment 6.1 Maintenance. 6.2 Frequency of Calibration. 6.3 Airflow. 6.4 Smoke Measurement System Calibration Test6.5 Fuel. 6.6 Uncoated Fiber-Reinforced Cement Board Test. Chapter 7 Test Specimen Preparation 7.1 Specimen Conditioning. Annex E Informational References 7.4 Cable Mounting. Chapter 8 Test Procedure 8.1 Procedure. 8.2 Exhaust Duct Velocity Measurement Calculations. Chapter 9 Post-Test Cleanup and Inspection 9.1 Debris. 9.2 Windows. 9.3 Supports. 9.4 Damaged Boards. 9.5 Preparation for Next Test. 9.6 Cleanliness of Smoke Measurement System. Chapter 10 Calculations 10.1 Optical Density of Smoke. 10.2 Exhaust Duct Velocity Measurement Calculations. Chapter 11 Report 11.1 Data. Chapter 12 Precision and Bias 12.1 Applicability. Annex A Explanatory Material Annex B Smoke and Heat Release Measurements Annex C Smoke Measurement System and Chamber-Brick Configuration: Detail Drawings Annex D Standard Reference Cable Test Annex E Informational References

This standard shall prescribe the methodology to measure flame travel distance and optical density of smoke for insulated, jacketed, or both, electrical wires and cables and optical fiber cables that are to be installed in plenums and other spaces used to transport environmental air without being enclosed in raceways.