Welcome to the official website of Guanghui Cable Co., Ltd.!

language

Request Quote

Fill in your phone and email information, and we will contact you promptly within one business day to resolve the issue you raised as soon as possible.

Home

Rigid fire-resistant cable

BTTZ cables, known domestically as fire‑resistant cables, have been manufactured on a dedicated production line that enables the company to produce magnesium oxide‑based cables in extended lengths—up to 1,000 meters per reel, compared with the traditional limit of 50–100 meters. This capability effectively addresses the drawbacks associated with short cable lengths and numerous splices, significantly reducing project investment costs, accelerating installation, and ensuring reliable, stable performance.

Category:

Fire-resistant cable

Email:

guanghuicable@gmail.com

WhatsApp:

8618931892651

Telephone:

+86-18931892651

Request a Quote

Description

Product Description

BTTZ cable In China, these cables are referred to as fire‑resistant cables. In recent years, the company has invested in a dedicated production line capable of manufacturing magnesium oxide cables (BTTZ) with lengths of up to 1,000 meters per reel—far exceeding the traditional limit of 50–100 meters per cable. This innovation effectively addresses the numerous drawbacks associated with short cable lengths and frequent splices, significantly reducing project investment costs, accelerating installation, and ensuring reliable, stable performance.

BTTZ Cable Description:
BTTZ is a heavy‑duty fire‑resistant cable with a copper conductor and a copper sheath, featuring magnesium oxide insulation (also known as heavy‑duty mineral insulated cable). It is a novel type of cable that employs a seamless copper tube as its outer sheath, with magnesium oxide powder filling the core as the insulating material, and a solid copper strand as the conductor.

Model number	Specifications	Number of cores	Rated voltage
BTTZ	1.0~400mm²	1, 2, 3, 4, 7, 12, 19 cores	750V
BTTVZ	1.0~400mm²	1, 2, 3, 4, 7, 12, 19 cores	750V
WD-BTTYZ	1.0~400mm²	1, 2, 3, 4, 7, 12, 19 cores	750V
BTTQ	1.0~4mm²	1, 2, 3, 4, 7 cores	500V
BTTVQ	1.0~4mm²	1, 2, 3, 4, 7 cores	500V
WD-BTTYQ	1.0~4mm²	1, 2, 3, 4, 7 cores	500V

B----Fixed‑installation power cable for wiring T----Copper sheath T----Copper conductor Z----Heavy‑duty, voltage‑rated up to 750 V

1. The full name of BTTZ cable is Heavy-Duty Copper-Conductor, Copper-Sheathed Magnesium-Oxide Mineral-Insulated Cable.
2. Mineral-insulated cables with a cross-sectional area of 25 mm² or greater are all single-core.
3. Specifications: 1×6~1×400mm² | 2×1.0~2×25mm² | 3×1.0~3×25mm² | 4×1.0~4×25mm²

BTTZ cable characteristics:
It features high-temperature resistance, fire‑proofing, explosion‑proofing, and non‑combustibility (capable of continuous long‑term operation at 250°C and short‑term operation for 30 minutes even under extreme conditions of 1,000°C), along with large current‑carrying capacity, a small outer diameter, high mechanical strength, and an extended service life; moreover, it typically does not require a separate grounding conductor.

BTTZ Cable Applications:
It is widely used in high-rise buildings, nuclear power plants, metallurgical facilities, chemical plants, mines, kilns, and other hazardous, harsh, and high-temperature environments. In recent years, it has also been increasingly deployed in high-rise buildings, airports, ports, subways, and similar venues to ensure the uninterrupted operation of fire‑fighting pumps, fire‑fighting elevators, local lighting, emergency evacuation signage, security surveillance systems, smoke control and exhaust systems, as well as standby power supplies and other critical fire‑protection equipment.

FAQs

Which regions are covered by the scope of cooperative supply

Our products are sold to more than 20 provinces, municipalities, and autonomous regions across the country, and we can also undertake various foreign-related engineering supply and services.

How is the company's R&D and technical capability

Establish a professional talent team, adhere to independent innovation and the combination of industry, academia and research, and possess strong research and development capabilities and technological advantages.

Can the product meet special requirements such as fire prevention and environmental protection

We can provide special cables such as flame retardant, fire-resistant, low smoke, and halogen-free, which meet the standards of green environmental protection, safety, and fire prevention.

Where are the production bases and service outlets distributed

Headquartered in Sima, with a manufacturing base in Ningjin, Hebei, and over 100 marketing and technical service outlets nationwide.

How is the company's credit reputation

For 10 consecutive years, it has been awarded the provincial-level "Contract abiding and Creditworthy Unit" and has also been honored with the title of Consumer Trusted Unit in Hebei Province.

What authoritative qualifications and honors does the enterprise possess

Received multiple honors including Top 200 Comprehensive Strength Enterprises in the National Cable Industry, AAA Credit Enterprise, Hebei Province High Quality Products, and Provincial Advanced Enterprise in Quality and Efficiency.