Copper XLPE Fire Resistant Low Voltage Power Cable adopts oxygen-free copper conductors, XLPE insulation and fire-resistant barrier layers. It can maintain power-supply capacity under fire conditions. Different from ordinary flame-retardant cables, it features a higher safety level and serves as the preferred cable for emergency power distribution in overseas public buildings and high-risk premises.
|
Nominal section (mm²) |
Minimum number of conductor wires |
Conductor outer diameter （mm） |
Nominal thickness of XLPE insulation/mm |
Approximate outer diameter of insulation/mm |
Maximum conductor resistance at 20 ℃(Ω/km) copper |
|
1.5 |
1 |
1.36±0.02 |
0.7 |
3.0 |
12.1 |
|
1.5（B） |
7 |
1.56±0.02 |
0.7 |
3.2 |
12.1 |
|
2.5 |
1 |
1.75±0.02 |
0.7 |
3.4 |
7.41 |
|
2.5（B） |
7 |
2.01±0.02 |
0.7 |
3.6 |
7.41 |
|
4 |
1 |
2.22±0.02 |
0.7 |
3.8 |
4.61 |
|
4（B） |
7 |
2.52±0.02 |
0.7 |
4.1 |
4.61 |
|
6 |
1 |
2.72±0.03 |
0.7 |
4.3 |
3.08 |
|
6（B） |
7 |
3.09±0.03 |
0.7 |
4.7 |
3.08 |
|
10 |
6 |
3.9±0.10 |
0.7 |
5.5 |
1.83 |
|
16 |
6 |
5.0±0.10 |
0.7 |
6.6 |
1.15 |
|
25 |
6 |
6.1±0.10 |
0.9 |
8.1 |
0.727 |
|
35 |
6 |
7.1±0.10 |
0.9 |
9.0 |
0.524 |
|
50 |
6 |
8.2±0.15 |
1.0 |
10.4 |
0.387 |
|
70 |
12 |
9.8±0.15 |
1.1 |
12.2 |
0.268 |
|
95 |
15 |
11.6±0.15 |
1.1 |
14.0 |
0.193 |
|
120 |
18 |
13.2±0.15 |
1.2 |
15.8 |
0.153 |
|
150 |
18 |
14.6±0.20 |
1.4 |
17.6 |
0.124 |
|
185 |
30 |
16.2±0.20 |
1.6 |
19.6 |
0.0991 |
|
240 |
34 |
18.5±0.20 |
1.7 |
22.1 |
0.0754 |
|
300 |
34 |
20.5±0.20 |
1.8 |
24.3 |
0.0601 |
|
400 |
53 |
23.3±0.20 |
2.0 |
27.5 |
0.0470 |
Excellent conductivity and stable resistance generate less heat during long-term operation. Multi-strand stranded structure provides better flexibility for laying in complex scenarios.
Compared with traditional PVC insulation, it delivers superior heat resistance, anti-ageing performance and chemical corrosion resistance. Its long-term operating temperature can reach 90 ℃ with greatly improved insulation stability.
This core differentiating material adopts mica fire-resistant layer. When exposed to open-flame burning, it forms a hard heat-insulating carbonized layer to block high-temperature erosion on conductors and guarantee short-term continuous power supply under fire conditions.
Wear-resistant, moisture-proof and UV-resistant. It resists moisture and mild corrosion outdoors and in cable trenches to extend the overall service life of the cable.
Sampling tests are performed for copper materials, XLPE pellets and mica fire-resistant tapes. Non-conforming raw materials are prohibited from production.
Conductor cross-section, insulation thickness and fire-resistant wrapping process are monitored in real-time to avoid dimensional deviation and uneven wrapping.
DC resistance test, power-frequency withstand-voltage test, insulation-resistance test, fire-resistant burning test, ageing test and low-temperature bending test fully simulate engineering service conditions.
Appearance, specifications and packaging are inspected item-by-item. Test archives are kept for each batch. English-language test documents can be issued to satisfy overseas project acceptance and customs-clearance requirements.
Current-carrying medium. High-conductivity oxygen-free copper ensures stable power transmission.
Core distinctive structure. It isolates high temperature during fire and maintains circuit power supply, which is the biggest difference from ordinary power cables.
Main electrical-insulation component, high-temperature resistant and anti-ageing, not easy to crack in long-term operation.
Makes the cable compact and round and improves mechanical compression resistance.
Provides mechanical protection against friction, moisture, sunlight and mild soil corrosion.
The multi-layer structure works synergistically to realize dual capabilities: stable power transmission under normal conditions and short-term continuous power supply under fire conditions.
Passes fire-resistant burning tests. It can maintain normal power supply for a certain period under open-flame conditions to ensure the operation of emergency lighting, fire-fighting pumps and alarm systems. Ordinary flame-retardant cables can only slow down fire spread and cannot sustain power supply.
XLPE insulation allows long-term operating temperature of 90 ℃ and higher short-circuit withstand temperature, with far better heat-resistance performance than PVC-insulated cables.
Cross-linked polyethylene material is UV-resistant and heat-ageing-resistant for long-term laying on indoor cable trays and in outdoor overhead conditions.
Dense sheath blocks moisture, suitable for humid cable trenches and underground laying. It resists weak acid and weak-alkali corrosion.
Compact overall structure offers good compression and pull-resistance, resisting damage during civil-construction work.
A: Ordinary flame-retardant cables are mainly intended to limit flame propagation, while fire-resistant cables are constructed to maintain circuit integrity for a specified period under fire conditions. The cable incorporates mica fire-resistant layers that help maintain electrical continuity during fire exposure, making it applicable to circuits serving fire-fighting pumps, emergency lighting and alarm systems.
A: The XLPE insulation has a specified long-term operating temperature of up to 90℃. It provides good thermal stability and resistance to aging and chemical exposure. Compared with PVC insulation, XLPE is generally better suited to applications where higher continuous operating temperatures are required, subject to the selected cable specification and installation conditions.
A: The fire-resistant layer is made from mica fire-resistant tape. Under high-temperature flame exposure, mica maintains its insulating properties and forms a heat-resistant barrier around the conductor, helping protect the electrical insulation system and maintain circuit continuity for the specified fire-resistant period.
A: Inspection can include raw-material checks, production-line monitoring, finished-product conductor resistance testing, power-frequency withstand-voltage testing, insulation-resistance testing, fire-resistant burning tests, aging tests and low-temperature bending tests. Relevant test records can be retained by batch, and English-language technical or test documents can be provided according to the documentation requirements of overseas projects.
A: The applicable laying method depends on the cable construction and site conditions. The sheath provides protection against moisture, UV exposure and weak acid or weak alkali environments. The cable can be considered for indoor cable trays, outdoor overhead routing, humid cable trenches and certain direct-buried applications where the mechanical, environmental and installation requirements have been confirmed.
A: The main construction can be described in five layers:
1. Oxygen-free copper conductor for electrical current transmission;
2. Fire-resistant mica layer to help maintain circuit continuity under fire conditions;
3. XLPE insulation layer providing electrical insulation and thermal stability;
4. Filler layer for structural support and dimensional stability;
5. Outer sheath providing protection against mechanical wear, moisture and outdoor exposure.
The combined construction addresses both normal power transmission and fire-resistant circuit requirements.
A: The conductor is made of high-purity oxygen-free copper. A stranded conductor construction provides greater flexibility than a solid conductor of the same cross-section, making routing and connection work easier in cable trays, conduits and other confined wiring spaces. Electrical performance should be evaluated according to the conductor size and applicable cable specification.
A: XLPE insulation has a short-circuit temperature limit of up to 250℃ for the specified short duration, subject to the applicable cable standard and operating conditions. Finished cables can undergo power-frequency withstand-voltage and insulation-resistance testing before delivery. For humid underground installations, the sheath, insulation system, drainage conditions and laying method should all be considered to maintain long-term electrical performance.
Address
Qiancheng Cable Co., Ltd., Hengde Industrial Park, Gucheng County, Hengshui City, Hebei Province, China
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