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eLibrary > 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 >

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

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]
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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]

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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

⨯To continue with accurate pricing,
please select your company type below: