Ground Bus Bar

A Ground Bus Bar, also referred to as a Grounding Busbar, Ground Bar, or Earth Bus Bar, is a vital element in any electrical grounding system. It provides a secure, low-resistance pathway for bonding and grounding conductors, ensuring electrical faults are safely dissipated and equipment voltages remain stable. As leading busbar manufacturers, we specialize in producing premium Copper Ground Bus Bars and Aluminum Ground Bus Bars for industrial, commercial, and utility applications.

Whether you need a Bare Copper Bus Bar, Tinned Copper Ground Bar, or Silver Plated Ground Busbar, we offer both standard and custom options tailored to your project.

What Is a Ground Bus Bar?

A ground bus bar is a conductive bar mounted inside an electrical enclosure or cabinet that serves as the centralized point for grounding wires. It ensures proper electrical grounding, reduces EMI/RFI noise, and provides an equipotential ground reference for sensitive systems. It is essential in applications such as breaker boxes, control panels, and solar inverters.

Key Features of Our Grounding Bus Bars

• Material Options:

• 99.9% pure high-conductivity copper (C11000 / T2) or lightweight aluminum

• Available in bare, tin-plated, or nickel-plated finishes to resist oxidation

• Current Rating:

• From 200A to 5000A, depending on dimensions and application

• Voltage Compatibility:

• Suitable for 600V to 35kV grounding systems

• Temperature Resistance:

• -40°C to +85°C standard; high-temp versions rated to 150°C

• Short Circuit Withstand:

• Up to 100kA for 3 seconds (IEC / UL tested)

• Mounting Flexibility:

• Pre-drilled holes, terminal capacity of 4–60+ ports, and optional insulators (Nylon, PVC, or Ceramic)

• Compliance:

• UL 891, IEC 60439, NFPA 70, RoHS, REACH

Specifications Table – Copper Ground Bus Bar

Ground Bus Bar for Electrical Panel Applications

Installing a ground bus bar in breaker boxes or electrical panels ensures a low-resistance return path for fault currents. Our products are compatible with both copper and aluminum conductors and are widely used in:

1. Power Cabinets & Switchgear

• Essential for electrical distribution and neutral vs ground bar separation.

2. Telecom & Data Centers

• Isolated ground bars help eliminate signal interference in -48V DC systems.

3. Solar PV Systems

• Grounding bars for solar inverters and combiner boxes resist harsh weather conditions.

4. Industrial Power Systems

• Large copper bus bars serve heavy machinery grounding in power plants.

5. Railway & Transit

• Tinned copper ground bars with anti-vibration support are used in substations and locomotives.

How to Use Ground Bus Bar Systems

Installing a ground bus bar involves:

• Mounting the bar using screws or brackets inside the electrical cabinet

• Connecting all grounding wires (equipment, enclosure, panel ground) to the bar using lugs or direct screw terminals

• For insulated systems, using nylon or ceramic insulators to isolate the bar from the enclosure

• Ensuring the bar is bonded to a primary earth ground for optimal performance

Proper grounding reduces shock risk, limits surge damage, and meets electrical codes such as NEC / NFPA 70.

Maintenance & Longevity

• Routine Checks: Quarterly inspection for oxidation and thermal spots

• Testing: Resistance <0.5Ω, insulation >1MΩ annually

• Cleaning: Citric acid solution; apply conductive grease after cleaning

• Replacement: If material loss ≥10% or thermal rise >30°C detected

Why Choose Us?

• ISO-Certified Copper Busbar Supplier with 15+ years of experience

• Custom fabrication using CNC and automated punching

• Flexible MOQ and fast turnaround

• Global logistics and full UL/CE/RoHS compliance

• Competitive pricing direct from busbar manufacturers

Need a Custom Ground Bus Bar?

Whether you're upgrading your electrical panel or designing a complex grounding system for industrial machinery, we’re here to help. As a trusted copper busbar supplier, we offer engineering support, fast prototyping, and global delivery.

Contact us today to request a quote or buy copper busbar at factory-direct pricing.

FAQ – Copper Ground Bus Bar

Q1: What is a Copper Ground Bus Bar used for?
A: It serves as a centralized grounding point in electrical systems to safely dissipate electrical current to the earth, ensuring system protection and user safety.

Q2: What types of surface finishes are available?
A: Bare copper is standard, but tin-plated and nickel-plated options are available for corrosion resistance and improved conductivity.

Q3: Can you customize the size and number of holes?
A: Yes, we offer full customization including length, width, thickness, number and spacing of holes, and type of insulators.

Q4: Are your bus bars compliant with international standards?

A: Yes, our products comply with UL, CE, RoHS, and REACH standards.

Q5: Do you supply insulators or mounting hardware with the bus bar?
A: Yes, we can supply insulators, brackets, screws, and other mounting accessories upon request.

Q6: What industries commonly use Copper Ground Bus Bars?
A: They are widely used in electrical panels, data centers, telecommunications, renewable energy systems, and industrial automation.

Q7: How do I choose the right bus bar size?
A: The size depends on your required current rating, installation space, and connection points. Our team can assist with technical selection.

Q8: Do you offer OEM or branding services?
A: Yes, we support OEM/ODM and can engrave your company logo or part number on the bus bar.