Characteristics of Eco-Friendly Home Wiring

Advantages: The wire is relatively soft and is often used in temporary power applications. It significantly reduces requirements for installation angles and is well suited for bending and conduit routing. Disadvantages: It has a short service life, oxidizes rapidly, and is prone to issues such as broken conductors and localized overheating, necessitating timely replacement. Given that concealed wiring in electrical circuits is a hidden project, BV wire—typically with a longer service life—is generally preferred.

2023-06-28

Flexible Mineral-Insulated Fire-Resistant Cable Support Bracket

What regulations must flexible mineral-insulated fire-resistant cable support brackets comply with? The brackets shall meet the following requirements: 1. The surface shall be smooth and free of burrs. 2. They shall be durable and stable, suitable for the intended service environment. 3. They shall provide the required load-bearing capacity. 4. They shall satisfy the fire protection requirements of the project. Metal cable supports shall undergo corrosion‑protection treatment and shall comply with the following provisions: 1. For high‑capacity power plants and other locations with dense cable installations, as well as for critical circuits, steel cable trays should be equipped with corrosion‑protection treatments that offer long‑term durability, selecting appropriate corrosion‑protection methods based on the project’s environmental conditions and durability requirements. In highly corrosive environments, it is advisable to use corrosion‑protection treatments with higher durability, such as hot-dip galvanizing.

2023-06-28

The reason why armored cables are relatively expensive.

Armored cables can be applied to cables of any structure in the mechanical protection layer to enhance their mechanical strength and improve their corrosion resistance, making them ideal for wiring and cabling applications in areas prone to mechanical damage and extreme corrosion. They can be installed using any suitable method and are particularly well suited for direct burial in rocky terrain, with their primary function being to prevent rodent gnawing.

2023-06-28

What is a multi-core cable?

1. What Is a Multi-Core Cable? A multi‑core cable refers to a cable that contains one or more insulated conductor cores. Common types of multi‑core cables include 2‑core, 3‑core, 4‑core, 5‑core, 3+1‑core, 3+2‑core, 4+1‑core, and more; the number of cores in control cables can reach as high as 61.

2023-06-28

A Brief Discussion on the Causes of Overheating in Wires and Cables

A cable featuring polyethylene as the insulating material—commonly referred to as PE cable—is a type of extruded insulation cable. PE cables can be used in power cable circuits across a wide range of voltage levels. Typically, PE cables boast high dielectric strength, a high insulation resistance coefficient, a low dissipation factor, a light specific gravity, excellent moisture resistance and processing performance. As we all know, wires and cables tend to heat up during operation; as the load current continuously increases, the ambient temperature around the wires and cables rises accordingly. If this issue is not addressed in a timely manner, once the temperature exceeds a certain threshold, it can have adverse effects on the wires and cables. To effectively address the problem of overheating in wires and cables, we must first understand the root causes behind it. 1. Conductor Resistance Does Not Meet Specifications This is one of the most common reasons for wire and cable overheating. When conductor resistance fails to meet specified standards, it can lead to excessive heating during cable operation. 2. Incorrect Cable Model Selection Poor cable model selection can result in an undersized conductor cross‑section, causing the cable to operate under heavy load conditions. Over time, uneven heat dissipation and thermal management within the cable can lead to overheating. 3. Poor Quality of Connection Joints If connection joints are not properly manufactured or are inadequately crimped, the contact resistance at the interface may become excessively high, leading to overheating in the cable. 4. Excessive Cable Bundling When cables are installed in overly compact bundles, their ventilation and heat dissipation capabilities are significantly reduced. Alternatively, if cables are placed too close to other heat sources, their normal heat dissipation is compromised—both scenarios can cause the cables to overheat during operation. 5. Damage to the Protective Sheath Damage to the armor‑plated cable’s protective sheath can allow moisture to penetrate, gradually degrading the dielectric properties of the insulation. As a result, the insulation resistance decreases over time, which can also lead to overheating during cable operation. In daily life, if you notice that wires or cables are overheating, and you are unable to identify the cause within a short period, it is crucial to promptly contact qualified personnel to inspect and resolve the issue on-site—before a potential fire accident occurs. It also offers advantages such as ease of processing.

2020-07-09