Grounding Clamps

Grounding Clamps for Earthing Systems — Low-Resistance, All-Weather Electrical Bonding Solutions

Grounding clamps from Avantar (Guangdong) Industrial Holdings Co., Ltd. are pieces of mechanical bonding gear designed to make connections between ground rods, earthing conductors, and metal structures that are stable and have low resistance. Hot-dip galvanised steel or a high-conductivity copper alloy is used to make them. They can fit rods with diameters from 1/2" to 1" and conductor cross-sections from 6 mm³ to 300 mm³. These connectors come in UL 467, IEC 62561-2, and RoHS-compliant styles like C-type, U-bolt, parallel-groove, and saddle clamp. They ship from Guangdong within 7–15 working days.

What Are Grounding Clamps and How Do They Work?

When you connect a ground rod to an earthing conductor or metal structure with an earthing clamp, you make a permanent electrical link. These devices' main job is to make a steady, low-impedance path for lightning and fault current to safely reach the earth.

Each clamp has a mechanical grip and a face that is charged with electricity. No matter if the joint is outside or underground, the anti-loosening lock design keeps it from coming loose when the temperature or vibration changes. This is a common place for failure. You don't need any special tools to run it.

Key Product Features

Low Resistance Earthing Joint (LREJ)

It is designed so that the contact surfaces and clamp body have low contact resistance at the rod-to-conductor interface. This keeps the bonding impedance low for the whole service life.

Endurance in Any Weather

Long-term corrosion protection of tinned copper-alloy and hot-dip galvanised finishes is not affected by rain, ice, coastal salt spray, or soil that is acidic. These finishes also keep their electrical conductivity when left outside for a long time.

Lock Design That Won't Loosen

The mechanical locking mechanism keeps the clamp from coming loose even when it is subjected to long-term vibration, heat cycling, or mechanical stress. This is an important feature for both substation and overhead line gear.

Compatible with Wide Widths

Standard rod sizes range from 1/2" to 1" and conductor cross-sections range from 6 mm³ to 300 mm³. This means that adapters and other non-standard hardware are not needed as much.

Application Scenarios

These connectors are used across a range of power and infrastructure projects:

• Power substations — ground-rod-to-conductor bonding at transformer and switchgear earthing points
• Renewable energy projects — solar farm and wind turbine earthing systems
• Lightning protection systems — down-conductor connections and earthing electrode terminations
• Distribution networks — cable earthing and neutral bonding along overhead and underground lines
• Industrial facilities — equipment and busbar grounding where mechanical vibration is present

Technical Specifications

How to Select the Right Model？

Selecting the correct grounding clamp comes down to three parameters:

1. Ground-rod diameter — standard range 1/2" to 1"
2. Earthing conductor cross-section — 6 mm² to 300 mm²
3. Clamp style — C-type, U-bolt, parallel-groove, or saddle, depending on installation geometry

For material selection: tinned copper-alloy Grounding Clamps are preferred for coastal sites, underground installations, or chemically aggressive soils where corrosion risk is higher. Galvanized-steel clamps suit general-purpose above-ground applications. Avoid combining dissimilar metals at the same joint to reduce galvanic corrosion risk.

Standard MOQ is 100 pieces per model. Share your ground-rod specification, conductor size, and site conditions with the team, and a specific model recommendation will be returned.

Custom Design Options

Most of the needs for an earthing system can be met by normal catalogue sizes. OEM and ODM programs for setups that aren't standard.

You can ask for custom clamp aperture openings for conductor diameters that aren't in the normal range. You can choose the material, polish the surface, set the rod diameter, and describe the conductor cross section based on the project drawings or the conditions at the site.

For bigger projects like substations, solar farms, or lightning protection networks, the engineering team can look at your ground rod requirements and conductor layout to either offer the right model or come up with a solution that is just right for you. Email your detailed specs or drawings to [email protected].

Quality Assurance and Certifications

Before being sent out of the Guangdong plant, each batch is checked for its dimensions and material composition and contact resistance.

For exporting, you need a certificate of origin and official UL and IEC test reports to get through customs and submit a bid. For large projects, video inspection of finished goods and examination of witnesses by a third party can be set up before shipment.

FAQ

Q: What part do the goods play in structures that ground things?

A: Earthing clamps connect ground rods, earthing wires, and metal structures in a way that is stable and has low resistance. They are made of copper alloy or galvanised steel with finishes that don't rust, and they keep the electricity going even in a variety of outdoor and underground conditions. There are different kinds of clamps, such as C-type, U-bolt, parallel-groove, and saddle clamps. They can fit rods from 1/2" to 1" in diameter and conductors from 6 mm³ to 300 mm³.

Q: Does Avantar make things or do they just sell them?

A: Avantar is a direct manufacturer. The Guangdong factory does all of its own copper-alloy and galvanised steel stamping, surface finishing, dimensional inspection, and contact-resistance testing. This means that buyers can get direct technical support for projects like solar farms, substations, and lightning protection.

Q: What kinds of quality papers and certifications are out there?

A: The factory makes products that are safe and meet UL 467, IEC 62561-2, and RoHS standards. A certificate of origin and official UL and IEC test reports are sent with all exports. Before the goods are shipped, you can look at the material and dimension records, watch a video inspection, or have a third party inspect the work for tender projects.

Q: What is the minimum order quantity (MOQ), wait time, and logistics?

A: In general, the MOQ for each model is 100 pieces. The lead time for catalogue items is between 7 and 15 business days after the order is confirmed. Antioxidation bundles or wooden crates are used to pack the goods. You can get quotes for both sea freight and air freight using EXW, FOB, and other common foreign trade terms.

Q: Can the clamp opening and size be changed?

A: Yes. Through the OEM/ODM program, you can get custom opening sizes for conductor diameters that aren't standard, rod sizes that aren't in the catalogue, and different mixes of material or finish. For a technical review, send your plans or specifications to [email protected].

Contact Us

Have a specification to confirm or ready to request a quote with Grounding Clamps? Email [email protected] with your rod size, conductor size, and project requirements.