Certification and Registration
Electrical wires and cables
Category:
Electrical Wires
As people’s living standards improve, high-power electrical appliances such as air conditioners and water heaters have become increasingly common. The widespread use of these devices inevitably increases the load on electrical wires and cables, thereby increasing the risk of fire. Currently, the insulation and sheathing materials of most wires and cables on the market are made from various polymers, including polyethylene, polypropylene, and polyvinyl chloride. Since these materials are combustible, they can easily ignite when exposed to high temperatures or open flames. In addition to material-related factors, short circuits in wires and cables are also a major cause of fires.
Methods for improving the flame-retardant performance of wires and cables typically involve adding halogen-containing compounds and metal oxides to sheath materials. This approach can effectively enhance flame retardancy; however, because these materials contain halogens, large amounts of smoke and hydrogen halide gases may be generated during combustion. As a result, visibility is significantly reduced during fires, making evacuation and firefighting more difficult. More seriously, trapped individuals may suffer from suffocation caused by toxic gases. In addition, when hydrogen halide gases react with moisture in the air, they form hydrohalic acid, which can severely corrode instruments, equipment, and building structures, resulting in secondary damage.
Therefore, the flame-retardant performance of wires and cables requires not only excellent ignition resistance but also consideration of smoke density and harmful gas emissions. Various countries and regions have established corresponding testing standards, including:
UL1581:2009 Safety Reference Standard for Electrical Wires
EN 50265-2-1:1999 Common test methods for cables under fire conditions - Test for resistance to vertical flame propagation for a single insulated conductor or cable - Part 2-1 : Procedures -1 kW pre - mixed flame
EN 50265-2-2:1999 Common test methods for cables under fire conditions - Test for resistance to vertical flame propagation for a single insulated conductor or cable - Part 2-2 : Procedures - Diffusion flame
IEC 60332-3-21:2000 Tests on electric cables under fire conditions - Part 3-21: Test for vertical flame spread of vertically-mounted bunched wires or cables; Category A F/R
IEC 60332-3-22 Tests on electric cables under fire conditions - Part 3-22: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category A
IEC 60332-3-23 Tests on electric and optical fibre cables under fire conditions - Part 3-23: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category B
IEC 60332-3-24 Tests on electric and optical fibre cables under fire conditions - Part 3-24: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category C
IEC 60332-3-25 Tests on electric and optical fibre cables under fire conditions - Part 3-25: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category
DIN EN 6059-303 Aerospace series - Electrical cables, installation - Protection sleeves - Test methods - Part 303: Resistance to fluids
ISO 6722:2006 Road vehicles - 60 V and 600 V single-core cables - Dimensions, test methods and requirements
GB/T 17651:1998 Measurement of smoke density of cables burning under defined conditions. Part 1: Test apparatus
GB/T 12666.1-2008 Test method on a single wire or cable under fire conditions.Part1:Vertical specimen flame test
GB/T 12666.2-2008 Test method on a single wire or cable under fire conditions.Part2:Horizontal specimen flame test
GB/T 12666.3-2008 Test method on a single wire or cable under fire conditions.Part 3:Slanting specimen flame test
IEC 60695-2-12-2000 (GB 5169.12) Fire hazard testing - Part 2-12: Glowing/hot-wire based test methods - Glow-wire flammability index (GWFI) test method for materials
ASTM D 2863-2008 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)
ISO 4589-2:1996 + A1:2005 Plastics - Determination of burning behaviour by oxygen index - Part 2: Ambient-temperature test
ISO 4589-3:1996 Plastics - Determination of burning behaviour by oxygen index - Part 3: Elevated-temperature test
GB/T 2406.1:2008 Plastics.Determination of burning behaviour by oxygen index.Part 1:Guidance
GB/T 10707:2008 Rubber.Determination of the burning
GB/T 8924:2005 Test method for flammability characteristics of fiber reinforced plastics-Oxygen index method
GB/T 16581:1996 Test method for the determination of oxygen index of insulating liquids
JB/T 8988:1999 Test method for the determination of oxygen index of insulation liquids
UL 94:2009 Test for flammability of plastic materials for parts in devices and appliances
BS EN 50305:2002 Railway applications. Railway rolling stock cables having special fire performance. Test methods
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