Glow-Wire and Hot-Wire Methods
Fire-hazard methods based on heated wires or related thermal ignition sources for electrotechnical products and insulating materials.
Electrical fire hazard
Fire Hazard and Material Flammability Solutions
Flammability Test Equipment for IEC 60695, UL 94 and Cable Fire Tests
Configure glow-wire, needle-flame, 50 W and 500 W test-flame equipment, plastic-material chambers, cable flame systems, automotive and aerospace testers, non-combustibility apparatus and flammable-refrigerant test systems. The page is organized around the governing method, specimen and result—not around model numbers alone.
IEC 60695UL 94IEC 60332UL 1581FMVSS 302ISO 1182ISO 817
Quick Answer
Technical Overview: What Is Flammability Test Equipment?
Flammability test equipment applies a defined heat, flame, electrical arc or combustible-gas condition to a specimen and measures a method-specific response. Depending on the standard, the result may be ignition, afterflame, afterglow, flame spread, burning rate, damaged length, dripping, non-combustibility or laminar burning velocity.
Equipment selection starts with the purchased standard and exact clause. A glow-wire tester, needle-flame apparatus, 50 W burner, 500 W flame system, UL 94 chamber and cable flame tester represent different ignition sources and different acceptance logic. They should not be treated as interchangeable versions of one machine.
For a defensible laboratory configuration, also confirm the specimen form, mounting, conditioning, gas type, ventilation, calibration scope, timing functions and reporting expectations.
12 Method FamiliesElectrical, material, cable and gas tests
IEC · UL · ISOInternational test-method coverage
System + VerificationBurners, blocks, gauges and sensors
Custom SpecimensFixtures, chambers and project review
Method first, machine secondThe standard and clause determine the ignition source, apparatus and procedure.
Needle flame is not 50 W flameIEC 60695-11-5 is a separate method from nominal 50 W test-flame procedures.
500 W is not a universal upgradeSelect it only when the governing method requires the IEC 60695-11-3 flame.
Material and end-product tests differGWFI, GWIT, UL 94 classifications and end-product fire tests answer different questions.
Which Standard Applies to Your Fire or Flammability Test?
Do not select equipment from the word “flammability” alone. Different standards simulate different ignition scenarios, use different specimen forms and report different results. Freeze the governing publication and test method before comparing chambers or quotations.
Needle, 50 W, 500 W and 1 kW Flames
Test-flame generation, verification and application methods. The required burner and calibration system depend on the specific part.
Burner-based methods
Plastic Material Classification
Horizontal, vertical, 5V, thin-material and foam procedures selected around material form and requested classification.
Polymeric materials
Single Wire and Cable Flame Propagation
Vertical flame test apparatus and procedures for single insulated wires, cables and optical-fibre cables.
IEC cable method
VW-1, FT1 and Related Cable Tests
North American cable flame procedures with method-specific burner, specimen support and evaluation requirements.
Method confirmation required
Automotive Interior Materials
Horizontal burning-rate evaluation for materials used in the occupant compartment of motor vehicles.
Automotive scope
Textile and Aerospace Materials
Vertical flame-spread and Bunsen-burner methods for fabrics, flexible materials and aircraft interior applications.
Industry-specific fixtures
Non-Combustibility Testing
A furnace-based method for selected building and related materials; it is not equivalent to a UL 94 or small-flame test.
Material reaction to fire
Flammable Refrigerant Safety
Burning-velocity measurement and application-oriented tests for mildly flammable and flammable refrigerants.
Refrigerant safety
Four Questions That Define the Correct Equipment
A technically sound quotation should answer these questions explicitly. When one is missing, the equipment list is likely incomplete or incorrectly matched.
What is the ignition source?
Heated glow wire, resistance wire, needle flame, premixed burner flame, electrical arc, furnace or combustible gas mixture.
What is being tested?
Raw material, standardized material specimen, component, cable, interior trim, textile, finished product or refrigerant mixture.
What result is required?
Ignition, afterflame, afterglow, flame spread, burning rate, damaged length, material class, non-combustibility or burning velocity.
What must be verified?
Temperature, force, motion, burner geometry, gas flow, flame energy, timing, electrode movement, imaging or specimen conditions.
How to Select Flammability Test Equipment
The equipment families below are separated by test mechanism and application. This structure prevents unrelated systems from being presented as simple power or size variants.
Glow-Wire Test Systems
Simulate thermal stress from overheated or glowing electrical parts. Select the apparatus around the applicable IEC 60695-2 method, test object, temperature range, contact force, specimen movement and required observation criteria.
- IEC 60695-2-10 apparatus construction and operating basis
- Related end-product, GWFI and GWIT applications
- Temperature, contact force, penetration and timing verification
Needle-Flame Test Systems
Apply a small standardized flame to components, insulating parts or selected positions in an end product to assess ignition and flame propagation under simulated fault conditions.
- IEC 60695-11-5 needle-flame method
- Flame height and burner-position verification
- Afterflame, afterglow and indicator-layer observations
50 W Test-Flame Equipment
Generate and verify a nominal 50 W test flame for the applicable IEC 60695-11 procedures. The burner, gas, flame calibration and specimen fixture must match the selected test method.
- Separate method from IEC 60695-11-5 needle-flame testing
- 50 W burner, copper block and thermocouple verification
- Method-specific fixture and flame-application sequence
500 W Test-Flame Systems
Provide a higher-energy premixed flame for material and product evaluations that specifically require the IEC 60695-11-3 test-flame system and its verification arrangement.
- 500 W premixed flame generation and adjustment
- Burner angle, chamber, timing and specimen support
- 10 g copper-block and thermocouple verification scope
UL 94 Material Flammability
Evaluate horizontal and vertical burning behavior of plastic, foam, film and other non-metallic specimens. Required fixtures depend on the classification method and specimen form.
- HB, V-0, V-1 and V-2 methods
- Optional 5V, VTM and foam-method fixtures
- Afterflame, afterglow, burning rate and dripping observations
Wire and Cable Flame Propagation
Assess flame spread on a single insulated wire, cable or optical cable. IEC 60332 and UL 1581 use different apparatus and procedural details, so the governing standard must be fixed before purchase.
- IEC 60332-1 single-cable vertical flame propagation
- UL 1581 VW-1 / FT1 cable test arrangements
- Burner, gas flow, fixture, chamber and damaged-length review
Electrical Ignition Resistance
Use hot-wire or high-current arc methods when the fire hazard comes from localized electrical heating or repeated arc faults rather than direct exposure to an open flame.
- Hot-wire ignition of solid insulating materials
- UL 746A high-current arc ignition assessment
- Power, wire, electrode, speed and cycle verification
Automotive Interior Flammability
Measure horizontal burning performance of vehicle interior materials. Confirm specimen cutting, conditioning, exposure direction and required reporting before selecting the chamber.
- FMVSS 302 automotive interior material testing
- Burning-rate measurement and timing
- Interior trim, seating, insulation and flexible material applications
Textile and Aerospace Flame Tests
Use dedicated vertical-burning or Bunsen-burner systems for fabrics, flexible sheets and aerospace cabin materials. These methods require industry-specific fixtures and exposure conditions.
- ISO 6941 vertical flame-spread evaluation
- FAA / FAR Bunsen-burner configurations
- Afterflame, damaged length and specimen-specific observations
Non-Combustibility Test Systems
Evaluate whether selected materials meet the applicable non-combustibility method. This is not the same as a small-flame or UL 94 classification test.
- ISO 1182 furnace and specimen-holder arrangement
- Temperature, mass and specimen-behavior observations
- Building and related material applications
Flammable Refrigerant Burning Velocity
Measure laminar burning velocity of premixed combustible gas-air mixtures for refrigerant classification and appliance-safety work involving mildly flammable or flammable refrigerants.
- ISO 817 Annex C and IEC 60335-2-40 applications
- Gas preparation, ignition, imaging and flame-front analysis
- Safety review for vacuum, pressure, exhaust and gas treatment
A2L Enclosure and Application Tests
Support system-level evaluation related to appliances using A2L refrigerants. The chamber, release arrangement, sensors and safety controls must follow the exact clause and project scope.
- IEC 60335-2-40 application review
- Release position, concentration monitoring and enclosure conditions
- Project-specific fixtures, interlocks and data collection
Flammability Test Equipment Selection Matrix
Use this matrix to connect the specimen, method, standard and practical procurement notes. The product links lead to the closest current KingPo equipment pages; final configuration must still be checked against the exact clause.
| Test object / application | Test method | Standard basis | Typical equipment | Selection notes |
|---|---|---|---|---|
| Electrical or appliance part | Glow-wire end-product test | IEC 60695-2-10 / related method | Glow Wire Tester | Confirm test object, temperature, contact force, penetration, tissue layer and timing. |
| Insulating material | GWFI / GWIT material evaluation | IEC 60695-2-12 / -2-13 | Glow Wire Tester with material fixtures | Confirm specimen form, conditioning and applicable result index. |
| Small component or localized position | Needle-flame | IEC 60695-11-5 | Needle Flame Test Apparatus | Confirm burner geometry, flame height, test angle, duration and indicator layer. |
| Product or material requiring 50 W flame | 50 W test flame | IEC 60695-11-4 and applicable method | 50 W Test-Flame System | Confirm the actual test method; do not treat it as a needle-flame variant. |
| Product or material requiring 500 W flame | 500 W test flame | IEC 60695-11-3 | 500 W Flame Tester | Confirm gas, burner, copper-block verification, specimen support and chamber volume. |
| Plastic material | Horizontal / vertical burning | UL 94 / IEC 60695-11-10 / -11-20 | UL 94 Flame Chamber | Confirm classification, thickness, specimen form and required fixtures. |
| Single insulated wire or cable | Vertical flame propagation | IEC 60332-1 series | Single Cable Flame Propagation Tester | Confirm cable diameter, specimen length, burner, gas flow and damaged-length criteria. |
| North American wire or cable | VW-1 / FT1 | UL 1581 / applicable CSA method | UL 1581 VW-1 / FT1 Chamber | Confirm which procedure and burner configuration the certification plan requires. |
| Solid insulating material | Hot-wire ignition | IEC TS 60695-2-20 / applicable material standard | Hot Wire Ignition Tester | Confirm wire, power density, winding, tension, exposure time and result reporting. |
| Polymeric insulating material | High-current arc ignition | UL 746A HAI | High Current Arc Ignition Tester | Confirm current, electrode geometry, separation speed, arc count and maintenance scope. |
| Vehicle interior material | Horizontal burn-rate test | FMVSS 302 | FMVSS 302 Tester | Confirm specimen cutting, conditioning, thickness and test direction. |
| Textile or flexible material | Vertical flame spread | ISO 6941 | ISO 6941 Vertical Burning Chamber | Confirm specimen holder, ignition procedure and measured flame-spread parameters. |
| Aerospace cabin material | Bunsen-burner exposure | FAA / FAR 25.853 method as applicable | FAA Bunsen Burner Chamber | Confirm vertical, horizontal or other required method and specimen fixture. |
| Building or related material | Non-combustibility | ISO 1182 | Non-Combustibility Apparatus | Confirm specimen geometry, furnace arrangement and required measurement channels. |
| Flammable refrigerant or gas mixture | Laminar burning velocity | ISO 817 / IEC 60335-2-40 | Burning Velocity Test Apparatus | Confirm gas composition, mixing accuracy, imaging, exhaust treatment and report format. |
Important: a “higher-power” or “more severe” flame is not automatically an acceptable substitute for another method. Certification work must use the apparatus and procedure specified by the governing standard.
From Standard Review to Defensible Test Results
Reliable fire testing depends on much more than the chamber itself. The following workflow should be included in equipment planning, operating procedures and acceptance testing.
1. Freeze the methodConfirm the standard edition, clause, specimen, conditioning and required result before equipment selection.
2. Verify the ignition sourceCheck temperature, burner geometry, gas flow, flame height, flame energy, wire power or arc parameters.
3. Control the exposureSet specimen orientation, distance, force, movement, application time, cycles and chamber conditions.
4. Record and judgeCapture time, flame spread, damaged length, dripping, temperature, mass, images or calculated burning velocity as required.
Flammability Test Equipment Video Center
Use these videos to understand equipment format, operator access and general workflow. Final parameters, fixtures and acceptance criteria must follow the applicable standard and agreed project specification.
KingPo Fire Hazard, Material and Cable Test Systems
The gallery shows representative system formats. Equipment appearance and internal fixtures may vary according to the selected standard, model, specimen and automation level.
View More Equipment Images ＋
Burners, Copper Blocks, Gauges and Replacement Parts
A complete quotation should distinguish the test system from the tools required to verify and maintain the ignition source. Ask which accessories are included, which require third-party calibration and which are recurring consumables.
1 kW Test Flame BurnerIEC 60695-11-2 burner for applicable 1 kW test-flame methods.
50 W Test Flame BurnerIEC 60695-11-4 burner for nominal 50 W flame generation and application.
500 W Copper BlockIEC 60695-11-3 Figure 2 copper block used in 500 W flame verification.
50 W Copper BlockIEC 60695-11-4 Figure 1 copper block used in 50 W flame verification.
Flame Height GaugeReference gauge for checking the required flame height before testing.
Glow-Wire TipReplacement Ni/Cr glow-wire component manufactured for the applicable apparatus geometry.
Additive-Free Cellulose PaperSpecified wrapping tissue or indicator paper for applicable glow-wire observations.
Thermocouple Wire WelderTool for preparing fine thermocouple junctions used in temperature and flame verification.
Procurement note: confirm the supplied gas regulators, flowmeters, burners, copper blocks, thermocouples, flame-height gauges, specimen fixtures, indicator paper, glow-wire tips and exhaust interfaces. A chamber without the required verification tools is not a complete laboratory solution.
Where Flammability Test Equipment Is Used
The same industry can require several fire-test methods because raw materials, components and finished products are evaluated under different clauses.
Electrical and Electronic Components
Switches, connectors, terminal blocks, PCBs, insulation supports, housings and components exposed to abnormal heat or internal fault conditions.
Household Appliances
Insulating parts, internal wiring supports, enclosures and components evaluated under product-standard fire-hazard clauses.
Plastics and Insulating Materials
Engineering plastics, foams, films, composites and material formulations requiring ignition, self-extinguishing or classification data.
Wire and Cable Laboratories
Power, communication, appliance and optical cables evaluated for flame propagation under IEC, UL or customer methods.
Vehicle Interior and Electrical Parts
Interior trim, seating materials, insulation, wiring components, connectors, electronic modules and related vehicle materials.
Textile and Aerospace Materials
Fabrics, films, foams and cabin materials requiring vertical burning or Bunsen-burner test methods.
Refrigerant and HVAC Safety
A2L / A3 refrigerants, low-GWP alternatives, gas mixtures and appliances using flammable refrigerants.
Certification, R&D and Quality Control
Type testing, material qualification, design verification, supplier approval, comparative studies and recurring quality checks.
What to Confirm Before Ordering
Send KingPo
- Standard, edition, clause and requested test method
- Specimen drawing, material, dimensions and thickness
- End-product, component, cable or standardized material specimen
- Fuel gas available, supply pressure and laboratory connection
- Electrical power, compressed air, exhaust and installation space
- Required fixtures, automation, data export and report functions
- Calibration certificate, FAT and acceptance expectations
Request Before Acceptance
- Clause-linked equipment and accessory list
- Burner, glow-wire, electrode and specimen-fixture records
- Temperature, force, flow, pressure, timing and motion verification scope
- Flame-calibration demonstration where applicable
- Safety interlock, ignition, exhaust and emergency-stop demonstration
- Sample-based factory acceptance test procedure
- Operating manual, maintenance schedule and training scope
Problems to Eliminate Before the Purchase Order
Calling every small-flame system a needle-flame tester
Needle flame, 50 W and 500 W methods use different apparatus and verification arrangements.
Chamber supplied without verification tools
Burners, copper blocks, gauges, thermocouples, flow control and fixtures may need separate line items.
Fuel gas or exhaust conditions not confirmed
The laboratory connection and safety infrastructure must suit the selected test method and local rules.
Fixture selected without drawings
Material thickness, product geometry, cable size and orientation directly affect the required support system.
Only the timer is calibrated
Method-specific parameters can include temperature, force, speed, current, flow, pressure, flame energy and imaging.
No sample-based FAT procedure
Agree on the demonstration specimen, verification sequence, documents and pass conditions before shipment.
Standards, Products and Technical Support
Use these resources to move from general method selection to a clause-linked equipment configuration.
All Flame Test Equipment ProductsBrowse core systems, burners, copper blocks, gauges, replacement parts and consumables.IEC 60695 Equipment GuideReview the major electrical fire-hazard methods and how their equipment differs.Glow-Wire and Flame Method ComparisonCompare glow-wire, needle-flame, 50 W, 500 W and horizontal / vertical burning concepts.UL 94 Flame Chamber GuideReview horizontal and vertical material-flammability testing and configuration points.Project and Case EvidenceReview delivered systems and application examples for procurement confidence.Request Configuration ReviewSend the standard, clause, specimen and utility details for an equipment recommendation.Email Technical TeamUse email when drawings, clause screenshots or procurement documents need to be attached.Standards Knowledge BaseBrowse IEC, ISO, UL and product-standard testing equipment guides.
Content Scope and Review Basis
Reviewed byKingPo Fire Hazard Test Equipment Engineering Team
Technical scopeElectrical, material, cable and refrigerant flammability equipment selection
Last reviewed6 August 2026
Acceptance basisPurchased standard, product standard and project specification
Flammability Test Equipment FAQ
What does flammability test equipment evaluate?+
It evaluates a defined fire-hazard response such as ignition, afterflame, afterglow, flame spread, burning rate, dripping, non-combustibility or burning velocity. The result depends on the exact method and should not be generalized across different standards.
What is the difference between glow-wire and needle-flame testing?+
Glow-wire testing uses a heated wire to simulate thermal stress from overheated electrical parts. Needle-flame testing uses a small open flame to simulate a localized ignition source caused by a fault. The apparatus, exposure and judgment criteria are different.
Is a 50 W test flame the same as a needle flame?+
No. IEC 60695-11-5 needle-flame testing is a separate method. A nominal 50 W test flame is generated and verified for the applicable IEC 60695-11 procedure and uses a different burner and calibration arrangement.
When should a 500 W flame tester be selected?+
Select it only when the governing standard or product requirement calls for the IEC 60695-11-3 500 W test flame or a method based on that flame. It should not be chosen simply because it appears more severe.
Can one UL 94 chamber perform every material classification?+
Not automatically. The chamber may support multiple methods, but HB, V, 5V, VTM and foam classifications can require different specimen holders, burners, application sequences and observation arrangements. Confirm the required methods before quotation.
What is the difference between IEC 60332-1 and UL 1581 VW-1?+
Both address cable flame behavior, but the apparatus and procedures are not interchangeable by default. The certification plan should define whether IEC 60332-1, UL 1581, CSA FT or another cable method applies.
What needs to be verified on a burner-based system?+
Typical checks include burner geometry, fuel type, gas and air flow, flame height, flame calibration, application angle, timing, specimen distance, chamber ventilation and the condition of copper blocks and thermocouples.
Do I need an exhaust system?+
Combustion testing generates heat, smoke and gases. The laboratory should provide a safe exhaust route and sufficient make-up air, while avoiding drafts during the test. The final installation should follow the equipment manual, local safety rules and the applicable method.
Which calibration items should be included in the quotation?+
Confirm the required scope for temperature, timer, gas flow, pressure, burner geometry, flame verification, contact force, movement speed, electrode motion, current, camera measurement or other method-specific parameters.
Can one chamber combine glow-wire, needle-flame and UL 94 tests?+
A shared cabinet is technically possible in some custom projects, but combining unrelated methods can complicate fixtures, contamination control, verification, ventilation and maintenance. Dedicated systems are usually clearer for certification laboratories.
What should be sent for an accurate quotation?+
Send the standard and edition, clause, specimen type and dimensions, required methods, gas available in the laboratory, electrical supply, exhaust conditions, automation expectations, calibration scope and site constraints.
What is the final acceptance authority?+
The purchased standard, product standard, certification plan and agreed technical specification are the acceptance authority. This page is a selection guide and should not replace the original normative documents.
