Concentric cable has become one of the most trusted low-voltage power distribution solutions for utilities, contractors, and industrial facilities seeking long-term reliability and stable electrical performance. As demand for safer, more efficient cable systems grows, concentric conductors provide a robust design that ensures consistent grounding, easier fault detection, and dependable current flow. At HNBF Power a global manufacturer of overhead conductors and power cables we provide high-performance concentric cables engineered for demanding electrical environments.

What Is Concentric Cable?

Concentric cable is a low-voltage power cable characterized by its unique conductor geometry: a central copper or aluminum conductor surrounded by one or more layers of helically laid neutral wires. This design ensures excellent grounding capability, mechanical durability, and improved fault-clearing performance.

It is widely used in:

• Residential and commercial power distribution

• Utility service entrance cables

• Low-voltage underground networks

• Industrial power supply systems

Its construction enhances safety and allows utilities to detect theft or system irregularities more easily compared to standard LV cables.

Technical Structure of Concentric Cable

1. Central Conductor

Typically copper or aluminum, depending on load requirements.
It carries the primary current and is designed for stable conductivity and low electrical resistance.

2. XLPE or PVC Insulation

A high-grade insulation layer protects the conductor against moisture, heat, and mechanical stress.
HNBF Power uses premium materials to ensure long service life in challenging conditions.

3. Concentric Neutral Wires

One or more layers of bare or PVC-coated wires are laid helically around the insulation.
Functions include:

• Providing a reliable grounding path

• Serving as a system neutral

• Enhancing cable strength and fault-withstand capacity

4. Outer Sheath

A PVC or LLDPE jacket protects against abrasion, chemicals, and environmental exposure.
HNBF Power applies anti-aging and UV-resistant formulations for underground and outdoor installations.

Key Advantages of Concentric Cable

 Superior Fault Detection

The concentric neutral allows faster identification of leakage or faults, improving grid reliability for utilities.

 High Mechanical Strength

The armored-like structure resists impacts, bending, and installation stress—ideal for direct burial applications.

 Theft and Tampering Prevention

Its design makes illegal tapping more difficult to conceal, supporting utility companies in loss reduction.

 Excellent Grounding Performance

The neutral wires ensure a stable, low-resistance path, protecting sensitive equipment and maintaining system safety.

 Long-Term Durability

With XLPE/PVC insulation and robust sheathing, concentric cables offer long operational life even in harsh environments.

HNBF Power manufactures concentric cables that meet global electrical standards, providing exceptional stability and performance for long-term infrastructure needs.

Applications in Modern Power Networks

Concentric cables are preferred for:

• Utility service entrances

• Underground residential distribution (URD)

• Electrical metering and street light circuits

• Industrial low-voltage power feeders

• Commercial building supply networks

Their reliability makes them suitable for both new installations and system upgrades.

Frequently Asked Questions (FAQs)

1. Is concentric cable suitable for underground installation?

Yes. Its mechanical strength and protective sheath make it ideal for direct burial and conduit applications.

2. What conductor materials are used in concentric cable?

HNBF Power manufactures both copper and aluminum versions depending on the customer’s electrical load and budget.

3. How does concentric cable improve safety?

The concentric neutral provides an efficient grounding path and enhances system protection, reducing the risk of electrical faults.

4. Can concentric cable be customized?

Yes. HNBF Power offers tailored conductor sizes, insulation materials, neutral designs, and sheath types based on project specifications.

5. What voltage range does concentric cable cover?

Most concentric cables are designed for low-voltage systems (typically 600V), but custom designs are available.

Looking for High-Quality Concentric Cable?

HNBF Power provides engineered, reliable, and fully customizable concentric cable solutions for utility, commercial, and industrial applications. Contact HNBF Power today to discuss your technical requirements and receive expert support for your next project.