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Low-smoke, halogen-free flame-retardant, fire-resistant wires and cables

Low-smoke, halogen-free wires and cables produce minimal amounts of smoke when exposed to flames, and the gases they release contain no toxic halogen elements. In the event of a fire, these materials significantly reduce harm to both equipment and human health, making them widely used in high-rise buildings, hospitals, large libraries, sports stadiums, disaster-resistant command and control centers, train stations, civil airports, passenger waiting areas, key cultural heritage sites, as well as subways, underground shopping malls, and other densely populated public spaces.

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Product Description

Product Overview

Low-smoke, halogen-free wires and cables produce minimal smoke when exposed to flames and release gases that contain no toxic halogens. In the event of a fire, these cables significantly reduce harm to both equipment and human health, making them widely used in high-rise buildings, hospitals, large libraries, sports stadiums, disaster-prevention command centers, railway stations, civil airports, passenger waiting areas, key cultural heritage sites, as well as subways, underground shopping malls, and other densely populated public spaces. Our company has developed and manufactured plastic-insulated wires and cables rated up to 35 kV, whose performance not only meets the stringent requirements specified in GB/T 12706-2008, GB/T 5023-2008, GB/T 9330-2008, and DJO8-93-2002 but also boasts a comprehensive product line—including flame-retardant, fire-resistant, and, most notably, low-smoke, halogen-free variants. These products precisely adhere to the national standards GB/T 17650-1-2-1998 and GB/T 17651-1-2-1998. Furthermore, following a rigorous national-level scientific and technological novelty search, our low-smoke, halogen-free cables have been confirmed to reach the advanced domestic level compared to similar products on the market.

Product model, name

Serial Number	Model	Name	Flame-retardant rating
1	WDZ-YJ(F)E WDZ-YJ(F)LE WDZ-YJ(F)Y WDZ-YJ(F)LY	(Irradiation-)Crosslinked Polyethylene Insulated Low-Smoke, Halogen-Free, Flame-Retardant Polyolefin Sheathed Power Cable	A B C
	WDZ-YJ(F)E23 WDZ-YJ(F)LE23 WDZ-YJ(F)Y23 WDZ-YJ(F)LY23	(Irradiation-)Crosslinked Polyethylene Insulated Steel Tape Armored Low-Smoke, Halogen-Free, Flame-Retardant Polyolefin Sheathed Power Cable
	WDZ-YJ(F)E33 WDZ-YJ (F)LE33 WDZ-YJ(F)Y33 WDZ-YJ (F) LY33 WDZ-YJ(F) Y43 WDZ-YJ (F)LY43 WDZ-YJ(F)E43 WDZ-YJ(F)LE43	(Irradiation-)Crosslinked Polyethylene Insulated Steel Wire Armored Low-Smoke, Halogen-Free, Flame-Retardant Polyolefin Sheathed Power Cable
2	WDZ-KYJ(F)E WDZ-KYJ(F)Y	(Irradiation-)Crosslinked Polyethylene Insulated Low-Smoke, Halogen-Free, Flame-Retardant Polyolefin Sheathed Control Cable	A B C
	WDZ-KYJ(F)E23 WDZ-KYJ(F)Y23	(Irradiation-)Crosslinked Polyethylene Insulated Steel Tape Armored Low-Smoke Halogen-Free Flame-Retardant Polyolefin Sheathed Control Cable
	WDZ-KYJ(F)EP WDZ-KYJ(F)YP	(Irradiation-)Crosslinked Polyethylene Insulated Copper Wire Braided Shielded Low-Smoke Halogen-Free Flame-Retardant Polyolefin Sheathed Control Cable
	WDZ-KYJ(F)EP2 WDZ-KYJ(F)YP2	(Irradiation-)Crosslinked Polyethylene Insulated Copper Tape Shielded Low-Smoke, Halogen-Free, Flame-Retardant Polyolefin Sheathed Control Cable
3	WDZ-KYJ(F)E33 WDZ-KYJ(F)Y33	(Irradiation-)Crosslinked Polyethylene Insulated Steel Wire Armored Low-Smoke Halogen-Free Flame-Retardant Polyolefin Sheathed Control Cable	B C D
	WDZ-BYJ(F) WDZ-BLYJ(F) WDZ-BY WDZ-BLY	(Irradiation-)Crosslinked / Non-Crosslinked Low-Smoke Halogen-Free Flame-Retardant Polyolefin Insulated Wires
	WDZ-BYJ(F)E WDZ-BLYJ(F)E WDZ-BYE WDZ-BLYE	(Irradiation-)Crosslinked / Non-Crosslinked Low-Smoke Halogen-Free Flame-Retardant Polyolefin Insulation, Low-Smoke Halogen-Free Flame-Retardant Polyolefin Jacket Wire harness
	WDZ-BYJ(F)R WDZ-BYR	(Irradiation-) Crosslinked / Non-Crosslinked Low-Smoke Halogen-Free Flame-Retardant Polyolefin Insulated Flexible Wires
4	WDZN-YJ(F)E WDZN-YJ(F)Y	Copper-core (irradiated) cross-linked polyethylene-insulated, low-smoke, halogen-free, flame-retardant polyolefin-sheathed, fire-resistant power cable	A B C
4	WDZN-YJ(F)E23 WDZN-YJ(F)Y23	Copper-core (irradiated) cross-linked polyethylene-insulated, steel-tape-armored, low-smoke, halogen-free, flame-retardant polyolefin-sheathed, fire-resistant cable Power cable	A B C
5	WDZN-YJ(F)E33 WDZN-YJ(F)Y33 WDZN-YJ(F)E43 WDZN-YJ(F)Y43	Copper-core (irradiated) cross-linked polyethylene insulated, steel wire-armored, low-smoke, halogen-free, flame-retardant polyolefin-sheathed cable with enhanced durability Fire-resistant power cable	A B C
	WDZN-KYJ(F)E WDZN-KYJ(F)Y	Copper-core (irradiated) cross-linked polyethylene-insulated, low-smoke, halogen-free, flame-retardant polyolefin-sheathed, fire-resistant control cable
	WDZN-KYJ(F)E23 WDZN-KYJ(F)Y23	Copper-core (irradiated) cross-linked polyethylene-insulated, steel-tape-armored, low-smoke, halogen-free, flame-retardant polyolefin-sheathed fire-resistant control cable Cable
	WDZN-KYJ(F)EP WDZN-KYJ(F)YP	Copper-core (irradiated) cross-linked polyethylene-insulated copper wire braid shielded, low-smoke, halogen-free, flame-retardant polyolefin-sheathed, fire-resistant cable Control cable
	WDZN-KYJ(F)EP2 WDZN-KYJ(F)YP2	Copper-core (irradiated) cross-linked polyethylene insulated, copper tape-shielded, low-smoke, halogen-free, flame-retardant polyolefin-sheathed, fire-resistant control cable Cable
	WDZN-KYJ(F)E33 WDZN-KYJ(F)Y33	Copper-core (irradiated) cross-linked polyethylene insulated, steel wire-armored, low-smoke, halogen-free, flame-retardant polyolefin-sheathed, fire-resistant cable Control cable
6	WDZN-BYJ(F) WDZN-BY	(Irradiation-)Crosslinked / Non-Crosslinked Low-Smoke Halogen-Free Flame-Retardant Polyolefin Insulated Fire-Resistant Wire	B C D
	WDZN-BYJ(F)E WDZN-BY	(Irradiation-)Crosslinked / Non-Crosslinked Low-Smoke Halogen-Free Flame-Retardant Polyolefin Insulation, Low-Smoke Halogen-Free Flame-Retardant Polyolefin Jacket Fire-resistant wire set
	WDZN-BYJ(F)R WDZN-BYR	(Irradiation-)Crosslinked / Non-Crosslinked Low-Smoke Halogen-Free Flame-Retardant Polyolefin Insulation, Low-Smoke Halogen-Free Flame-Retardant Polyolefin Jacket Set of fire-resistant flexible wires

Graded Selection of Product Usage Locations

1. Locations requiring low-smoke, halogen-free materials are classified into Special, Level 1, Level 2, and Level 3 categories based on the building's intended use, fire risk, and the difficulty of evacuation and firefighting efforts, as outlined in the table below.

Premium-level	High-rise residential buildings exceeding 100 meters in height (excluding super-tall residential structures)
	High-rise residential buildings exceeding 100 meters in height
First level	Building height does not exceed 100 meters. High-rise residential buildings	A category of buildings (excluding residential buildings in this category)
	Civil buildings and structures with a height not exceeding 24 meters, and building heights Single-story public buildings exceeding 24 meters in height	1. Ward buildings with 200 or more beds, and outpatient buildings on each floor with a floor area of 1,000 m² or more 2. Department stores, exhibition halls, and finance & trade buildings with a floor area of 3,000 m² or more per level, Telecom building, executive office tower; 3. Libraries and book collections holding more than 1 million volumes; 4. A stadium with more than 3,000 seats; 5. Important research building and data/archives building; 6. City-level postal building, radio and television building, power regulator building, and disaster prevention command center building Lobby areas, passenger waiting rooms at stations, and airport terminals for civil aviation; 7. Key cultural heritage protection sites; 8. Large-scale and above: cinemas, auditoriums, and lecture halls; 9. Public entertainment venues with a floor area of 200 m² or more.
Premium-level	High-rise residential buildings exceeding 100 meters in height (excluding super-tall residential towers)
	High-rise residential buildings exceeding 100 meters in height
First level	Underground Civil Structures	1. Subway systems and subway stations. 2. Ground-level cinemas and auditoriums; 3. Underground shopping malls, hospitals, hotels, exhibition halls, and other commercial or public venues with a usable area exceeding 1000 m²; 4. Important laboratories, as well as libraries, data centers, and archives.

Note: (1) The classification of Class 1 and Class 2 buildings shall comply with the provisions of the current national standard "Code for Fire Protection Design of Tall Civil Buildings" (GB5045).
(2) The classification of buildings not listed in this table can be determined by applying the principle of analogy to similar types of structures.

2. When low-smoke, halogen-free wires and cables are installed in bundled configurations, flame-retardant cables should be used. The selection of the flame-retardant rating must comply with the table below. Additionally, in locations where circuit integrity must be maintained and power supply sustained even under external fire conditions, fire-resistant wires and cables should be employed.

Choosing the Flame-Retardant Rating for Electrical Wires

Applicable Locations	Wire cross-section	Flame-retardant rating
Premium-level	50 mm² and above	Class B
Premium-level	35 mm² and below	Class C
First level	50 mm² and above	Class C
First level	35 mm² and below	Class D
Level 2, Level 3	All sections	Class D

Selecting the Flame-Retardant Rating for Cables

Applicable Locations	Flame-retardant rating
Premium-level	Grade A
First level	Class B
Level 2, Level 3	Class C

(1) The maximum operating temperature for wire and cable conductors, as well as the maximum temperature during a short circuit (with a maximum duration of no more than 5 seconds): - For low-smoke, halogen-free polyvinyl chloride insulation: 70°C, with a maximum short-circuit temperature not exceeding 160°C. - For cross-linked polyethylene insulation: 90°C; for thermoplastic low-smoke, halogen-free polyolefin insulation: 80°C, with a maximum short-circuit temperature not exceeding 250°C. - For irradiation-crosslinked polyethylene insulation: 105°C or 125°C, with a maximum short-circuit temperature not exceeding 250°C.

(2) The installation conditions and allowable continuous current-carrying capacity of low-smoke, halogen-free cables are identical to those of their corresponding non-low-smoke, halogen-free cable wires.

(3) The cables and wires exhibit low-smoke, halogen-free, flame-retardant, and fire-resistant properties during combustion, with specific performance indicators detailed in Table 6.2.12.

Serial Number	Trial Project	Standard requirement (halogen-free)
1	- Single-Strand Vertical Flame Test for Wires and Cables - Distance between the lower edge of the upper bracket and the starting point of the carbonized section - The flame extends downward to the lower edge of the upper support.	≥50mm ≤540mm
2	Cable Bundle Burning Test – Height Reached by the Charred Section	≤2.5 mm
3	Fire resistance test	During the burning test, apply the rated voltage of 3A. The fuse doesn't blow.
4	pH level	≥4.3
5	Electrical conductivity	≤10 μs/mm
6	Cable Smoke Density Test – Minimum Light Transmittance	≤60%