C-Type Screw-Operated Round-Jaw Earthing Rod

Quick Product Facts

• Product Type: Portable Earthing Rod
• Clamp Type: C-Type Screw-Operated Round-Jaw Phase Clamp
• Jaw Design: Curved Contact Profile
• Clamping Mechanism: Screw-Operated
• Rod Configurations: Telescopic and Non-Telescopic
• Intended Connection Points: Compatible Round Conductors and Cylindrical Conductive Components
• Key Selection Parameters: Clamp Opening, Conductor Diameter and Rod Length
• Application: Specified Temporary Earthing and Short-Circuiting
• Electrical Selection: Based on the Applicable Rating of the Complete Assembly

Technical Specifications

The following table outlines the main parameters for product selection. Exact dimensions, materials and electrical ratings depend on the selected model and must be confirmed against its technical datasheet and approved configuration.

For an accurate quotation, provide the conductor diameter, required clamp opening, rod length, rod structure and applicable electrical ratings. If the connection point has an unusual shape or limited access, a dimensional drawing or photograph can help clarify the required configuration.

Telescopic vs Non-Telescopic Earthing Rod

The round-jaw phase clamp can be specified with a telescopic or non-telescopic rod configuration where both versions are available for the selected model. The choice depends on the required operating reach, available working space, transport dimensions and project specifications.

When to Choose a Non-Telescopic Rod

A non-telescopic rod may suit projects that specify a fixed operating length. Buyers should confirm the total length, connection-point access and handling requirements before selecting this configuration.

When to Choose a Telescopic Rod

A telescopic rod may suit applications where an extendable structure helps meet the required operating reach and transport dimensions. Confirm the extended length, retracted length, number of sections and locking mechanism against the actual model specification.

Neither rod configuration should be assumed to have a higher electrical rating simply because of its structure. Both versions must meet the applicable electrical and insulation requirements for the intended application.

C-Type Screw-Operated Round-Jaw Clamp Design

The defining features of this product are its C-type clamp body, curved jaw profile and screw-operated clamping mechanism. Together, these features are intended for connection points where the conductor surface and dimensions are compatible with the round-jaw design.

Curved Jaw Profile

The curved jaw profile is designed to fit the external surface of compatible round conductors and cylindrical conductive components. The contact geometry distinguishes this clamp from a flat-jaw design intended for suitable busbars and flat conductive surfaces.

The actual fit depends on the conductor diameter, clamp opening and jaw dimensions. A curved profile does not guarantee compatibility with every round conductor, so these dimensions should be confirmed before ordering.

Screw-Operated Clamping Mechanism

The screw-operated mechanism allows the clamp to be adjusted around the intended connection point. The operator uses the mechanism according to the product design and the manufacturer's instructions.

The permitted operating method and any tightening requirements must follow the instructions for the selected model. Do not assume that applying additional force improves electrical performance or connection reliability.

C-Type Clamp Structure

The C-type body provides the overall structure around the conductor connection point. Its opening geometry and jaw dimensions determine the range of conductors that can be accommodated.

When evaluating a clamp for a specific installation, check the conductor diameter, available clearance, contact geometry and required operating position. A dimensional drawing can help establish whether the selected model fits the intended connection point.

Connection to the Insulating Rod

The phase clamp connects to the operating rod as part of the selected earthing assembly. The connection interface, rod structure and supplied components should be confirmed against the actual model documentation.

If your project specifies a particular operating length or connection arrangement, provide the relevant technical requirements when requesting a quotation. This helps avoid ordering a clamp or rod configuration that does not match the installation.

Typical Applications of Round-Jaw Earthing Clamps

Round Conductors

The round-jaw configuration is intended for round conductors that fall within the specified clamp opening and conductor diameter range. Before selecting the clamp, verify the conductor dimensions and the intended contact arrangement.

Do not select the product based on conductor shape alone. The clamp must also meet the applicable electrical requirements of the complete earthing assembly.

Cylindrical Conductive Components

Some electrical installations use cylindrical conductive components as connection points. A round-jaw clamp may be considered where the component dimensions, contact surface and approved application match the product specification.

For unusual connection geometries, provide a photograph or dimensional drawing. This allows the required jaw profile and opening range to be reviewed before procurement.

Electrical Substations

Substations contain different conductor arrangements and connection points. A round-jaw clamp may be suitable for specified temporary earthing applications where the designated connection point matches the clamp dimensions and the complete assembly meets the required electrical ratings.

The installation drawing, equipment specifications and approved work procedure should determine the connection point and product configuration. Do not assume that a clamp suitable for one conductor can be used on another conductor of a different diameter.

Overhead Line Maintenance

For overhead line applications, the selected clamp must match the specified conductor dimensions, connection method and operating arrangement. A round-jaw profile may be considered where its geometry and ratings meet the requirements of the installation.

The round-jaw design should not be treated as a universal overhead line clamp. Confirm conductor compatibility, operating reach and the applicable electrical requirements before selecting the equipment.

Temporary Earthing and Short-Circuiting

A round-jaw phase clamp may form part of a temporary earthing and short-circuiting assembly when the complete configuration is rated for the intended application and used according to the approved procedure.

Confirm whether the order covers the operating rod and phase clamp only or a complete set including grounding conductors, grounding clamps and other required components. The supplied scope should match the project specification.

How to Select the Right Round-Jaw Earthing Rod

1. Identify the Conductor Type

Identify the round conductor or cylindrical conductive component where the clamp will be applied. Record the conductor diameter and any relevant information about the contact surface and surrounding equipment.

If the connection point is not clearly defined, provide a photograph or drawing before selecting the clamp. This helps establish whether a round-jaw configuration is appropriate.

2. Confirm the Clamp Opening and Conductor Diameter

Compare the required conductor diameter with the clamp's specified operating range. The jaw profile and opening must fit the intended connection point within the manufacturer's stated limits.

If the maximum opening or compatible conductor range is not listed in the datasheet, request the dimensions before approving the product.

3. Review the Screw-Operated Mechanism

Confirm the actual screw mechanism and follow the manufacturer's operating instructions. Where the project has specific mechanical acceptance requirements, identify them during the technical review.

Do not substitute an assumed tightening torque or an improvised operating method for the approved instructions.

4. Select the Rod Structure and Length

Choose a telescopic or non-telescopic version according to the required operating reach, access conditions and transport dimensions.

For telescopic models, confirm the extended length, retracted length, section count and locking mechanism. For fixed-length models, confirm the overall length and the required working arrangement.

5. Confirm the Electrical Ratings

Check the rated short-circuit current, short-circuit duration and applicable insulation requirements of the complete earthing assembly. These parameters must match the electrical requirements of the project.

The clamp's mechanical dimensions alone do not establish its suitability for a particular short-circuit duty. Request the applicable technical documents before approving the product.

6. Confirm the Grounding Cable Configuration

Identify whether the grounding cable is included in the ordered assembly. If required, specify the cable length, conductor cross-section, connection details and other project requirements.

The cable, phase clamp and grounding connections must be compatible with the intended application and the electrical rating of the complete system.

7. Review Drawings and Test Documentation

For project procurement, confirm the required dimensional drawing, technical datasheet, applicable electrical test records and product identification. Verify that the documents correspond to the exact model and assembly being supplied.

Electrical Ratings and Product Compatibility

Mechanical compatibility and electrical performance are separate selection requirements. A clamp may fit the conductor dimensions but still be unsuitable if the complete earthing assembly does not meet the required electrical duty.

Conductor Compatibility

The round-jaw clamp should match the actual conductor diameter and contact geometry. Confirm the clamp opening range and the manufacturer's stated conductor limits before selecting the model.

Rated Short-Circuit Current and Duration

Temporary earthing and short-circuiting equipment must be selected according to the required fault-current conditions. The rated short-circuit current and permitted duration should be supported by the applicable product documentation.

Do not assume that clamps with similar dimensions or materials have the same short-circuit performance. Confirm the rating of the complete assembly rather than evaluating the clamp in isolation.

Insulating Rod Requirements

The rod's insulating performance must be supported by the technical specification and applicable test requirements for the selected model. Total rod length alone does not establish electrical suitability.

For telescopic versions, verify the requirements applicable to the complete rod and its approved operating configuration.

Quality Inspection and Technical Documentation

For utility, contractor and distributor orders, inspection should cover the mechanical configuration and the electrical requirements specified for the product. The inspection plan should be agreed according to the selected model, applicable requirements and project acceptance criteria.

Mechanical Inspection

Mechanical inspection may include checking the clamp body, jaw surfaces, screw mechanism, rod dimensions and supplied connection components. Dimensional acceptance criteria should follow the approved drawing or specification.

Electrical Performance Verification

Where required, confirm the applicable electrical performance tests and supporting records for the selected assembly. Visual inspection and mechanical operation checks alone do not establish the product's electrical suitability.

Documentation for Project Acceptance

Depending on the project, required documents may include a technical datasheet, dimensional drawing, electrical ratings, applicable test reports and inspection records. Confirm the available documents and their scope before order approval.

Safety Requirements for Temporary Earthing

Portable earthing equipment must be selected and used by trained and authorized personnel in accordance with the equipment manufacturer's instructions, applicable electrical safety requirements and the approved site procedure.

Isolation and Voltage Verification

Disconnection alone does not establish that electrical equipment is safe. Required isolation and voltage verification must be completed using the approved procedure and suitable equipment before the relevant work proceeds.

Where voltage detection is required, see our High Voltage Detector range for related electrical safety equipment.

Correct Clamp Application

Use the clamp only on connection points compatible with its dimensions and approved application. Follow the manufacturer's instructions for operating the screw mechanism and applying the complete earthing assembly.

Do not assume that a mechanically secure connection is sufficient if the assembly's electrical rating has not been verified.

Inspection Before Use

Inspect the clamp body, jaw surfaces, screw mechanism, insulating rod and any supplied grounding components according to the manufacturer's instructions. Remove damaged or defective equipment from service until it has been evaluated by qualified personnel.

This product description does not imply suitability for live-line contact. Use the equipment only within its approved application and the applicable electrical safety procedure.

Related Grounding and Electrical Safety Products

Depending on your project requirements, JINPOWER also supplies related grounding equipment and components for specified electrical safety applications.

• Portable Earthing and Short-Circuiting Set — for projects requiring a complete temporary earthing and short-circuiting assembly.
• Grounding Cable — for grounding cable specifications and compatible connection requirements.
• High Voltage Detector — for voltage verification as part of an approved electrical safety procedure.

What Should You Include in Your RFQ?

Providing the technical details at the inquiry stage helps reduce specification gaps and unnecessary quotation revisions. For project orders, include the conductor dimensions and the electrical requirements of the complete earthing assembly.

If the connection point has non-standard dimensions, include a drawing or photograph with the inquiry. This helps clarify the required clamp configuration before quotation and order confirmation.

Frequently Asked Questions

What is a C-Type Screw-Operated Round-Jaw Earthing Rod?

It is a portable earthing rod fitted with a C-type phase clamp that uses a curved jaw profile and a screw-operated clamping mechanism. It is intended for specified temporary earthing applications where the conductor geometry and electrical ratings are compatible with the selected assembly.

What is the main purpose of the round-jaw design?

The round-jaw design is intended for compatible round conductors and cylindrical conductive components. The actual conductor diameter, clamp opening and contact geometry must be checked before selection.

How does the screw-operated mechanism work?

The screw mechanism is used to adjust the clamp around the intended connection point. The operating method and any tightening requirements should follow the manufacturer's instructions for the selected model.

Can this clamp be used on every round conductor?

No. Suitability depends on the conductor diameter, clamp opening, jaw dimensions and electrical requirements of the complete assembly. Confirm compatibility using the technical specification or an approved drawing.

What is the difference between round-jaw and flat-jaw clamps?

A round-jaw clamp has a curved contact profile intended for compatible round conductors. A flat-jaw clamp has flat contact surfaces intended for suitable busbars and other flat conductive surfaces. The correct choice depends on the actual connection geometry and product specifications.

What is the difference between telescopic and non-telescopic versions?

A non-telescopic rod has a fixed-length structure, while a telescopic rod uses extendable sections. Select the configuration according to the required operating reach, transport dimensions and actual product specifications.

Is the grounding cable included?

The supplied components depend on the ordered configuration. Confirm whether the quotation covers the rod and clamp only or a complete assembly with grounding cable, grounding clamps and other required accessories.

What electrical ratings should I confirm before purchasing?

Confirm the rated short-circuit current, short-circuit duration, applicable insulation requirements and other parameters specified by the project. The ratings must be supported by the technical documentation for the selected assembly.

Can the clamp be used for live-line work?

Do not assume that this product is suitable for live-line applications. Use it only within its explicitly approved application and follow the applicable electrical safety procedure and manufacturer's instructions.

What documents should I request before bulk purchasing?

Depending on the project, request the technical datasheet, approved drawing, electrical ratings and applicable test or inspection records. Confirm that the documents correspond to the exact model and assembly being supplied.

What information is needed for a quotation?

Provide the conductor diameter, required clamp opening, rod structure, required length, grounding cable requirements, electrical ratings, quantity and project standards. A drawing or photograph of the connection point is also useful when available.

Request a Quote for C-Type Round-Jaw Earthing Rods

If you are sourcing C-type screw-operated round-jaw earthing rods for compatible conductors, substations or other specified temporary earthing applications, contact JINPOWER with your project requirements.

Please provide the required rod structure, overall length, conductor diameter, clamp opening, grounding cable configuration, rated short-circuit current and duration, and applicable project requirements.

For non-standard connection points, include a dimensional drawing or photograph to help clarify the required clamp configuration. JINPOWER can review the requested specifications and available technical documentation before quotation and order confirmation.