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BS EN 50399:2022 - TC Tracked Changes. Common test methods for cables under fire conditions. Heat release and smoke production measurement on cables during flame spread test. Test apparatus, procedures, results, 2023
- 30463364
- A-30406812 [Go to Page]
- undefined
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Test apparatus [Go to Page]
- 4.1 General
- 4.2 Test chamber
- 4.3 Ignition source [Go to Page]
- 4.3.1 Type
- 4.3.2 Positioning
- 4.4 Ladder
- 4.5 Inlet air supply
- 4.6 Hood
- 4.7 Exhaust duct [Go to Page]
- 4.7.1 General
- 4.7.2 Instrumentation in the exhaust duct [Go to Page]
- 4.7.2.1 General
- 4.7.2.2 Volume flow
- 4.7.2.3 Sampling probe
- 4.7.2.4 Sampling line
- 4.8 Extracting ventilator; effluent cleaning
- 4.9 Smoke production measuring equipment [Go to Page]
- 4.9.1 General
- 4.9.2 White light system
- 4.9.3 Laser light system
- 4.10 Combustion gas analysis equipment [Go to Page]
- 4.10.1 General
- 4.10.2 Oxygen
- 4.10.3 Carbon dioxide
- 5 Qualification of test apparatus [Go to Page]
- 5.1 General
- 5.2 Flow distribution measurements
- 5.3 Sampling delay time measurement
- 5.4 Commissioning calibrations
- 5.5 Routine calibration [Go to Page]
- 5.5.1 General
- 5.5.2 Procedure
- 5.5.3 Calculations
- 5.5.4 Criteria
- 5.6 Check of the flame shape
- 5.7 Performance checks of the test equipment
- 6 Test procedure [Go to Page]
- 6.1 Initial test conditions
- 6.2 Test sample
- 6.3 Sample conditioning
- 6.4 Determination of the number of test pieces [Go to Page]
- 6.4.1 General
- 6.4.2 Circular cables with a diameter greater than or equal to 20,0 mm
- 6.4.3 Circular cables with a diameter greater than 5,0 mm but less than 20,0 mm
- 6.4.4 Circular cables with a diameter less than or equal to 5,0 mm
- 6.4.5 Non-circular cables with a major axis dimension greater than or equal to 20,0 mm, a minor axis dimension greater than 4,0 mm and a major to minor axis ratio less than or equal to 5
- 6.4.6 Non-circular cables with a major axis dimension greater than 5,0 mm but less than 20,0 mm, a minor axis dimension greater than 4,0 mm and a major to minor axis ratio less than or equal to 5
- 6.4.7 Non-circular cables consisting of two identical round cables with a very small interconnecting link (“figure of 8 cables”) and with a minor axis of less than or equal to 4,0 mm
- 6.5 Mounting of the test sample [Go to Page]
- 6.5.1 Mounting of the test sample for all classes
- 6.5.2 Special mounting requirements for class B1ca
- 6.6 Exhaust volume flow
- 6.7 Propane and air flow rates to burner
- 6.8 Flame application time
- 6.9 Testing operations
- 6.10 Observations and measurements during the test
- 7 Determination of parameters derived from the test [Go to Page]
- 7.1 Calculation of HRR and SPR parameters [Go to Page]
- 7.1.1 Peak heat release rate value (Peak HRR)
- 7.1.2 Peak smoke production rate value (Peak SPR)
- 7.1.3 Total heat release value (THR1200)
- 7.1.4 Total smoke production value (TSP1200)
- 7.1.5 Fire Growth Rate Index (FIGRA)
- 7.1.6 Minimum heat release rate value (minHRR)
- 7.1.7 Minimum smoke production rate value (minSPR)
- 7.2 Determination of extent of flame spread (FS)
- 8 Test report [Go to Page]
- 8.1 General
- 8.2 Contents [Go to Page]
- 8.2.1 General information
- 8.2.2 Information on the cable tested
- 8.2.3 Information on the test
- 8.2.4 Results obtained
- 8.2.5 Calculated results
- Annex A (normative)Calculation of heat release [Go to Page]
- A.1 Volume flow
- A.2 Generated heat effect [Go to Page]
- A.2.1 Heat release from the ignition source
- A.2.2 Heat release from a tested product
- A.3 Calculation of the mole fraction of water vapour in the air
- Annex B (normative)Smoke production
- Annex C (informative)Additional information on Reynolds number in Figure 13
- Annex D (normative)Flow distribution inside the duct [Go to Page]
- D.1 General
- D.2 Velocity profile factor kc [Go to Page]
- D.2.1 General
- D.2.2 Measurement specifications
- D.2.3 Actions
- D.2.4 Calculation of kc
- D.2.5 Measurement report
- Annex E (normative)Commissioning calibrations [Go to Page]
- E.1 General procedures for separate pieces of equipment
- E.2 Gas analyser calibrations [Go to Page]
- E.2.1 General
- E.2.2 Oxygen analyser adjustment
- E.2.3 Oxygen analyser output noise and drift [Go to Page]
- E.2.3.1 Noise and drift
- E.2.3.2 Actions
- E.2.3.3 Criteria
- E.2.3.4 Calibration report
- E.2.4 Carbon dioxide analyser adjustment
- E.3 HRR calibrations [Go to Page]
- E.3.1 General
- E.3.2 HRR calibration by means of the burner [Go to Page]
- E.3.2.1 Conditions
- E.3.2.2 Procedure
- E.3.2.3 Calculations
- E.3.2.4 Criteria
- E.3.3 HRR calibration by means of burning a flammable liquid [Go to Page]
- E.3.3.1 General
- E.3.3.2 Conditions to be used for burning methanol
- E.3.3.3 Procedure for methanol
- E.3.3.4 Calculations
- E.3.3.5 Criteria
- E.3.4 Commissioning factor kt used for HRR calculations
- E.4 Smoke measurement system calibration [Go to Page]
- E.4.1 General
- E.4.2 Stability check
- E.4.3 Optical filter check for white light systems
- E.4.4 Smoke calibration by means of burning a flammable liquid [Go to Page]
- E.4.4.1 General
- E.4.4.2 Conditions to be used for burning heptane
- E.4.4.3 Procedure
- E.4.4.4 Calculations
- E.4.4.5 Criteria
- Annex F (informative)Guidance on calibration procedures for specific measuring equipment [Go to Page]
- F.1 General procedures for separate pieces of equipment
- F.2 Gas analyser calibrations [Go to Page]
- F.2.1 Oxygen analyser adjustment
- F.2.2 Carbon dioxide analyser adjustment
- F.3 Check of propane mass flow controller [Go to Page]
- F.3.1 General
- F.3.2 Actions
- F.3.3 Criterion
- F.4 Optical filter check for white light systems [Go to Page]
- F.4.1 General
- F.4.2 Actions
- F.4.3 Criterion
- Annex G (normative)Calculation of HRRav, SPRav and FIGRA [Go to Page]
- G.1 Calculation of HRRav
- G.2 Calculation of SPRav
- G.3 Calculation of the Fire Growth Rate Index (FIGRA)
- Annex H (informative)Guidance on the choice of test equipment [Go to Page]
- H.1 General
- H.2 Burner and venturi mixer
- H.3 Mass flow controllers
- H.4 Backing board
- Annex I (normative)Guidance on the file format for data from the test
- Annex J (normative)Rounding of numbers
- Annex K (informative)Check of the flame shape for nominal heat output of 20,5 kW [Go to Page]
- K.1 Introduction
- K.2 Preparation of the wooden boards
- K.3 Procedure (to be performed in duplicate)
- K.4 Evaluation
- K.5 Flame shape analysis
- Annex L (informative)Guidance on conducting performance checks of the test equipment [Go to Page]
- L.1 Introduction
- L.2 Fire test cable
- L.3 Performance of the fire test cable
- L.4 Procedure to check the performance of the test equipment
- L.5 Use of an alternative cable [Go to Page]