The NG-A (BTLY) cable is a high-performance, next-generation fire-resistant cable. It is specifically designed to overcome the limitations of traditional mineral insulated cables, such as restricted production lengths and the need for intermediate joints (splices) during installation.

This cable offers superior moisture resistance for the insulation layer and ease of handling. As its reputation for excellence grows, it has become a preferred choice for critical infrastructure in both industrial and civil construction.

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Product Name and Voltage Rating

Product Name: NG-A (BTLY) Flexible Mineral Insulated Fire-Resistant Cable

Rated Voltage: 0.6/1kV

Models and Specification Range

Applicable Standards

This product is manufactured and tested in accordance with the following standards:

GB/T 12706.1: Power cables with extruded insulation and their accessories for rated voltages from 1kV(Um=1.2kV)to 35kV(Um=40.5kV).

JG/T 313-2014: Mineral insulated cables with metallic sheath and their terminations for rated voltages of 750V and below.

GB/T 13033: Mineral insulated cables and their terminations with a rated voltage not exceeding 750V.

BS 6387: Performance requirements for cables required to maintain circuit integrity under fire conditions (Category CWZ).

Operational Characteristics

Voltage Levels: 0.6/1kV; Rated at 500V for light-duty and 1000V for heavy-duty applications.

Operating Temperature: Continuous maximum conductor operating temperature is 90℃, up to 250℃.

Bending Radius: Minimum permissible bending radius≥12D.

Core Technical Advantages

Fire Resistance: Strictly complies with BS 6387. In the event of a fire, it guarantees at least 3 hours of circuit integrity, providing vital time for personnel evacuation and property rescue.

Non-Hazardous Properties: High overload protection and excellent tolerance to high-current surges. Unlike standard cables, it will not ignite or act as a fire source during load fluctuations or short circuits, preventing disaster propagation.

Flame Retardancy: Composed primarily of inorganic minerals/compounds, the cable is inherently non-combustible. It will not spread flames or contribute to the fire load.

High Ampacity (Current-Carrying Capacity): Due to superior thermal properties, the BTLY cable can often be specified 1–2 cross-sectional sizes smaller than standard flame-retardant cables for the same current load.

High Voltage Withstand: The heavy-duty BTLY series is rated for 1000V, surpassing the performance of traditional rigid mineral insulated cables.

Explosion-Proof: Can be produced in continuous long lengths without intermediate joints. This prevents the passage of flammable oil vapors, gases, and flames through the cable into connected electrical equipment.

Superior Insulation: The insulation remains dimensionally stable above short-circuit temperatures. It features enhanced mechanical strength and chemical resistance, ensuring circuit continuity for 3 hours during a fire.

High-Temperature Adaptation: While standard cables are limited to 70℃-90℃, BTLY cables can operate continuously in ambient temperatures up to 250℃.

Waterproof Performance: Maintains excellent resistance to water spray and firefighting runoff even under active fire conditions.

Application Fields

The cable can be installed in tunnels, cable trenches, trays, trunking, and vertical shafts. The minimum installation temperature is $0^\circ\text{C}$. It is ideal for explosion-proof systems, high-risk fire zones, and facilities with stringent safety requirements.

Category	Specific Applications
High-Rise Buildings	General/Emergency lighting, fire alarms, fire elevators, data centers, dual-power control lines.
Aviation & Airports	Terminal lighting, fire monitoring, aerospace ground support, explosion-hazardous zones.
Oil & Chemical	Offshore platforms, hazardous explosive zones, emergency power for chemical processing.
Marine & Shipping	Engine room feeders, smoke extraction, ventilation, emergency broadcasting, galley power.
Public Infrastructure	Subways, tunnels, steel metallurgy (high-temp environments), power plants (heavy power lines).
Cultural & Commercial	Libraries, museums, historical monuments, shopping malls, data processing centers.
Public Utilities	Nuclear power stations (control & power), parking garages (smoke extraction & ventilation).