450/750V Fire-Resistant Shielded Control Cable
Core Structure: Solid copper conductors + double fire-resistant mica tape + PVC insulation + full copper braided shield + PVC outer sheath.
Core Performance: 90-minute fire resistance at 950℃, strong electromagnetic interference suppression.
Application Scenarios: Fire alarm linkage circuits, power plant secondary control, public building emergency fire equipment wiring.
Engineering Merit: 19 multi-core integrated design simplifies multi-loop wiring, large cross-section for high-current control loads.
Compliance: Meets national fire safety and low-voltage control cable mandatory standards.
Product Introduction
This 19-core fire-resistant shielded control cable (NH-KVVP 19×2.5) is rated at 450/750V, specially developed for fire safety critical control circuits. It adopts solid copper conductors, double-layer fire-resistant mica tape + PVC composite insulation, copper wire braided overall shielding and PVC outer sheath. Under high-temperature fire conditions, it can maintain stable circuit conduction for a specified period, while the full shielding structure eliminates external electromagnetic interference, widely used in fire alarm linkage, power plant secondary instrumentation and public building emergency control systems.
product key technologies
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1.Solid high-purity copper conductors
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2.Double-layer fire-resistant mica wrapping tape + PVC core insulation
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3.Elastic filling materials & binding wrapping tape
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4.Dense copper wire braided overall shielding layer
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5.Wear-resistant PVC outer protective sheath
- Solid Copper Conductors：High-purity solid copper provides stable low-resistance transmission for control signals and auxiliary small power supply. The 2.5mm² large cross-section carries larger operating current to match high-power fire-fighting equipment control loops.
- Double-Layer Fire-Resistant Mica Tape + PVC Insulation：The core fire-resistant mica layer forms a dense ceramic insulating barrier under 950℃ flame, blocking flame penetration and maintaining circuit continuity during fire accidents. PVC insulation ensures reliable core-to-core isolation under normal operating conditions to avoid short circuits.
- Fillers & Wrapping Tape：Elastic fillers round out the cable structure and buffer mechanical extrusion during laying; wrapping tape fixes internal cores to prevent dislocation and deformation.
- Copper Braided Overall Shielding Layer：Dense copper mesh fully shields electromagnetic interference generated by transformers, inverters and high-voltage equipment, preventing control signal distortion and misoperation of fire linkage devices.
- PVC Outer Sheath：Thickened PVC sheath isolates internal core structure from indoor dust, moisture and minor abrasion, providing daily environmental protection for the fire-resistant and shielding layers inside.
Key Advantages
- Class A Fire-Resistant Performance: Complies with national NH fire-resistant standard, stably conducts electricity for 90 minutes under 950℃ open flame, meeting mandatory fire safety codes for high-rise and crowded public buildings.
- Full Anti-Interference Shield Design: Integrated copper braided shield eliminates EMI/RFI noise, guaranteeing accurate signal transmission in power plants, electrical rooms and other high-interference sites.
- Large-Core High-Current Bearing: 2.5mm² single core cross-section adapts to heavy-load auxiliary power circuits of fire pumps, exhaust fans and other emergency equipment.
- 19-Core Integrated Layout: Combines 19 independent control loops into one cable, greatly simplifying wiring layout inside fire control cabinets and cutting construction costs.
- Long-Term Anti-Aging Durability: Stable PVC composite material resists thermal aging for decades of fixed indoor laying.
- Full Standard Compliance: Produced strictly in accordance with GB/T 9330 control cable standard and GB/T 19666 fire-resistant cable standard.
What Are the Product Application Scenarios?
- Fire automatic alarm and fire linkage control circuits of high-rise buildings, shopping malls and hospitals
- Secondary instrumentation and interlock control wiring in thermal power plants, substations and chemical plants
- Emergency power control for fire exhaust fans, water supply pumps and fire roller shutters
- Fire safety monitoring signal lines for subway, tunnel and underground comprehensive pipe corridors
- Indoor multi-loop control wiring of industrial fire-proof workshops and public infrastructure
Why Choose Shaanxi Jinshenghong Cable
Every batch undergoes full performance tests including fire resistance combustion, shielding attenuation and voltage withstand before delivery to verify fire safety and anti-interference capacity.
Adopts 100% oxygen-free solid copper and thickened high-temperature resistant mica tape, without recycled inferior raw materials.
Customizable options: ZA/ZB/ZC flame retardant grades, WDZN low-smoke zero-halogen fire-resistant versions and different core combinations.
Sufficient inventory and stable global logistics support fast delivery for fire protection engineering contractors and electrical cabinet manufacturers.
Professional technical team provides targeted fire safety wiring scheme consultation for high-rise and industrial projects.
Thoughtful service - worry free after-sales service
Global logistics
Provide global express and sea freight services, door-to-door, worry free and convenient.
Explanation: Our professional engineering team provides selection and technical support to answer your questions and clarify any doubts.
Provide comprehensive quality assurance and after-sales policies to ensure worry free procurement for you.
FAQ
Q1: What does NH-KVVP stand for?
A: NH = fire-resistant; KV = PVC insulated control cable; V = PVC outer sheath; P = overall copper wire braided shielding.
Q2: How long can the cable keep working under fire high temperature?
A: It can maintain normal circuit conduction for 90 minutes under 950℃ flame as required by national fire-resistant cable standards.
Q3: What is the core function of the copper braided shielding layer?
A: It blocks external electromagnetic interference from motors and power equipment to avoid fire control signal distortion and equipment misoperation.
Q4: Is this cable applicable to fire alarm system wiring?
A: Yes, its Class A fire-resistant performance fully meets national fire protection code requirements for fire alarm linkage circuits.
Q5: Can this standard NH-KVVP be laid outdoors under direct sunlight?
A: The ordinary PVC sheath is only suitable for indoor laying; customized UV anti-aging outer sheath version is required for open-air outdoor installation.
Q6: What national standards does this cable comply with?
A: It complies with GB/T 9330 (control cable standard) and GB/T 19666 (fire-resistant cable general technical specification).
Our address
West of Sanqiao Street Office, Weiyang District, Xi'an City, Shaanxi Province, adjacent to Fortune Building
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