耐火性PVC絶縁銅心線

In the fixed wiring of public places such as high-rise buildings, hospitals, schools, etc., it is the basis of safety design to choose a fire-resistant wire that meets the national standard and is easy to install. Yilan Cable, as a supplier and factory in the deep-ploughing industry, produces N-BV Fire Resistant PVC Insulated Copper Core Wire in strict compliance with GB/T 19666 standard, with clear fire resistance rating (such as N90 and N120). While ensuring uninterrupted key power and signal in the early stage of fire, its installation convenience is the same as that of ordinary BV wire, which greatly facilitates the implementation of the project.

What is a Fire Resistant PVC Insulated Copper Core Wire?

Yilan Cable's high-quality N-BV Fire Resistant PVC Insulated Copper Core Wire ensures the smooth flow of fire alarm signal transmission, emergency lighting and evacuation indication system at the critical moment of fire, which is the basis for rescue and escape. Ordinary wires fuse when they are in contact with fire, causing the system to collapse. Yilan Cable's N-BV fire-resistant wire, developed specifically for these critical circuits that cannot fail, has a mission to be a loyal guardian of the signal and power "last mile" at extreme temperatures.

How is it different from ordinary BV lines?

The N-BV wire is based on the BV wire, with a crucial reinforcement:

1. Fireproof core: between the high quality copper conductor and PVC insulation layer, we add a layer of special mica tape refractory layer. At high flame temperatures (750-800 ° C), mica ceramicizes to form a strong insulating skeleton that ensures that the wire is not burned and energized for up to 90 or 120 minutes. This is a capability that ordinary BV lines do not have.

2. Performance basis: It inherits all the advantages of BV wire-high purity copper core, good conductivity; PVC insulation provides good electrical insulation and mechanical protection; rated voltage 450/750V, long-term working temperature 70°C.

3. Easy installation: its outer diameter and flexibility are similar to ordinary BV wire, which can directly replace BV wire for pipe penetration and groove laying without special installation tools or technology, greatly reducing construction difficulty and cost.

Product parameters

Rated voltage: 450/750V

Long-term allowable operating temperature: +70 ° C

Maximum temperature in case of short circuit: +160 ° C (maximum duration 5 seconds)

Fire resistance time rating: 90 minutes or 120 minutes (according to standard requirements)

Standard: GB/T 19666-2005

FAQ

1. Where is it mainly used?

Circuits dedicated to fire that must not be powered off, such as signal lines and power lines of automatic fire alarm systems, emergency lighting and evacuation indication systems, control lines between fire fighting equipment, etc. Fire Resistant PVC Insulated Copper Core Wire is the "designated model" for these lifeline systems.

2. And more expensive fire-resistant cable (such as NH-YJV) than, how to choose?

N-BV is "wire", mainly used for indoor fixed routing of the end branch line (such as from the junction box to the smoke detector). NH-YJV and others are "cables" for trunk power supply. The two have different uses, N-BV is more economical and convenient for construction in branch lines.

3. How to confirm its fire resistance rating?

We provide clear fire rating marks, such as N90 (90 minutes) or N120 (120 minutes), and comply with GB/T 19666 national standards. When purchasing, please specify the grade according to the design requirements, and we will ensure that the product meets the standards.

4. Is there anything special to note when installing?

When terminal wiring, the mica layer exposed after stripping the insulation layer must be wrapped tightly with a special fire resistant sealant to restore the fire integrity of the place. Other laying requirements are the same as BV line.

Technical parameters and selection guide