XLPE Fire Resistant Copper Control Cable

Product Models: N(NH)-KYJV, N(NH)-KYJY, N(NH)-KYJVP, N(NH)-KYJYP, N(NH)-KYJV22, N(NH)-KYJY23, etc.

In fire-protection and emergency control systems, the control cable must continue to transmit electrical signals when exposed to abnormal heat or fire. XLPE Fire Resistant Copper Control Cable is intended for these low-voltage circuits, covering configurations for indoor routing, shielded signal wiring and mechanically protected installations. Its product range includes unarmored, shielded and armored constructions to match different laying conditions.

The cable incorporates a copper conductor, XLPE insulation and a double-layer synthetic mica tape fire-resistant structure. The supplied technical data specifies a maximum long-term operating temperature of 90℃ for the XLPE insulation. Core count, conductor cross-section, shielding and armoring can be selected according to the control circuit, equipment connection and installation method.

Product Specification, Dimensions and Technical Parameter Table

Construction and Fire-Resistant Performance

High-Purity Copper Conductor

The supplied specification identifies 99.99% high-purity oxygen-free copper as the conductor material. Class 1 solid conductors are listed for N-KYJV, while flexible conductor configurations are available for the corresponding flexible models. Cross-sections from 0.75 to 6 mm² and core quantities from 2 to 61 are listed, allowing the cable configuration to be matched with different control-circuit layouts.

XLPE Insulation

XLPE cross-linked polyethylene forms the primary insulation layer. The technical data specifies a maximum long-term operating temperature of 90℃ and a short-term overload tolerance of 130℃. This temperature range should be considered together with conductor loading, ambient conditions and the actual installation environment when selecting the cable.

Double-Layer Mica Fire-Resistant Structure

The fire-resistant layer consists of double-layer synthetic mica tape wrapping. According to the supplied specification, the cable can remain energized for 90 minutes under an open-fire temperature of no lower than 830℃. The fire-resistant layer is therefore a key part of the cable construction for emergency control and signal circuits where continued circuit operation is specified.

Flame-Retardant Outer Sheath

The outer sheath is specified as flame-retardant polyolefin. In addition to protecting the internal cable structure during installation and service, the sheath is intended to restrict flame propagation under the stated fire-performance conditions.

Models for Different Installation Conditions

The unarmored NH-KYJY/NH-KYJYR construction has a minimum bending radius of 6 times the cable outer diameter and can be used for cable trays, indoor conduits and cable trenches. Where electromagnetic interference is a concern, the shielded NH-KYJYP configuration provides copper-braided shielding with the specified coverage of at least 80%.

For routes exposed to mechanical pressure or underground installation, N-KYJV22 and N-KYJY23 are listed with double-layer steel-tape armor and a minimum bending radius of 12 times the cable outer diameter. The installation method, mechanical exposure, burial conditions and required protection level should be confirmed before selecting the armored construction.

Where the Cable Is Used

Fire-Protection Systems

Control and signal circuits for fire alarms, sprinkler pumps, smoke exhaust fans, fire shutters and emergency lighting can use the cable where the required fire-resistance and electrical parameters match the project specification.

Underground and Enclosed Facilities

Tunnels, comprehensive utility corridors, underground parking areas and other enclosed spaces may require fire-resistant control wiring for emergency equipment and fire-protection linkage systems.

New-Energy Facilities

Photovoltaic power stations, energy-storage equipment rooms and charging infrastructure can involve emergency control circuits where temperature, fire performance and installation conditions need to be considered together.

Public and High-Occupancy Buildings

Hospitals, schools, shopping malls, airports and office buildings may require fire-resistant control circuits for emergency systems and building-service equipment.

Industrial Facilities

Metallurgical, chemical and other industrial plants can use fire-resistant control wiring for equipment shutdown, alarm, emergency ventilation and related control functions, subject to the applicable project requirements.

Exported Electrical Equipment

The cable can be specified as part of electromechanical equipment or fire-protection systems intended for overseas projects, with the required standards, test documentation and packaging confirmed according to the destination market.

Technical Verification and Procurement Considerations

For a fire-resistant control cable, verification should cover more than the conductor material. The conductor cross-section, core quantity, insulation resistance, withstand-voltage result, fire-resistant layer, sheath material and applicable installation conditions should all correspond with the project specification.

The supplied data specifies 3000V/5min for the finished-product withstand-voltage test and an insulation resistance of at least 1000 MΩ·km at 20℃. For project procurement, the required test reports, certification documents and applicable destination-market standards should be confirmed against the exact cable model rather than the product category as a whole.

For export orders, packaging can be arranged with plastic film wrapping and plastic or fumigated wooden reels according to the supplied specification. Core identification, delivery length and any requirements for shielding, armoring or low-smoke halogen-free construction should be included in the order specification.

How to Specify the Cable for a Project

First confirm the control-circuit voltage and required fire-performance level. Then determine the conductor cross-section and number of cores according to the connected equipment and circuit design. If the cable route passes through an area with electromagnetic interference, a shielded construction can be considered. For direct burial or mechanically exposed routes, an armored model may be required.

The installation route also determines the minimum bending radius. Unarmored versions require at least 6 times the cable outer diameter, shielded versions at least 8 times, and the listed armored versions at least 12 times. For projects involving tunnels, hospitals, shopping malls or other high-occupancy locations, the required low-smoke halogen-free or other special cable construction should be confirmed in the project specification before ordering.

FAQ

1. What standard is specified for this cable?

The supplied technical table identifies GB/T 9330 as the applicable standard for the product. For overseas projects, the required international standard, certification documents and testing requirements should be confirmed according to the destination market and the exact cable construction.

2. What is the fire-resistant construction and how long can the circuit remain energized?

The cable uses double-layer synthetic mica tape as the fire-resistant layer. The supplied technical data specifies continuous energization for 90 minutes under an open-fire temperature of no lower than 830℃. The actual fire-resistance classification and test documentation should be verified against the ordered model and applicable project standard.

3. What conductor sizes and core quantities are available?

The listed standard conductor cross-sections are 0.75, 1.0, 1.5, 2.5, 4 and 6 mm². Standard core series include 2, 3, 4, 5, 7, 10, 14, 16, 19, 24, 27, 30, 37, 48, 52 and 61 cores. Special core counts can be discussed according to the project requirement.

4. Are shielded and armored versions available?

Yes. Shielded NH-KYJYP is listed with copper-braided shielding and a coverage rate of at least 80%. N-KYJV22 and N-KYJY23 are listed with double-layer steel-tape armor. The model should be selected according to electromagnetic interference, mechanical exposure and installation method.

5. What bending radius should be maintained during installation?

According to the supplied specification, unarmored NH-KYJY/NH-KYJYR requires a minimum bending radius of 6 times the cable outer diameter, shielded NH-KYJYP requires at least 8 times, and armored N-KYJV22 or N-KYJY23 requires at least 12 times.

6. What information is needed for a quotation?

Please provide the required model, conductor cross-section, core quantity, cable length, rated voltage, laying method and installation environment. If shielding, steel-tape armoring, low-smoke halogen-free construction, special delivery length or export packaging is required, these details should also be included so the specification and documentation can be matched accurately.