INDUSTRY COMPONENT

Contact Surface

The contact surface of a grounding clamp ensures low-resistance electrical connection to a grounded object.

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Component Specifications

Definition
The contact surface is the critical interface of a grounding clamp that directly contacts the workpiece or ground rod. It is designed to provide a low-impedance path for fault currents, ensuring safety and equipment protection. The surface must be clean, flat, and free of oxidation to maintain reliable electrical continuity.
Working Principle
The contact surface works by pressing firmly against a conductive material (e.g., copper, steel) to create a metal-to-metal junction. High contact pressure breaks through surface oxides, reducing contact resistance. The large surface area distributes current evenly, minimizing heating and voltage drop.
Materials
High-conductivity copper alloy (e.g., C11000) or brass, often tin-plated or silver-plated to resist corrosion. Steel with zinc or nickel plating for cost-sensitive applications.
Technical Parameters
  • Hardness 80-100 HRB
  • Plating Thickness 5-10 μm (tin) or 2-5 μm (silver)
  • Surface Roughness Ra ≤ 3.2 μm
  • Contact Resistance < 0.1 mΩ
Standards
IEC 61230, UL 467, DIN VDE 0683

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Contact Surface.

grounding clamp contact surface electrical contact surface low resistance grounding copper contact surface grounding clamp standards Contact Surface Contact Surface in Fabricated Metal Product Manufacturing

Parent Products

This component is used in the following industrial products

Grounding Clamps

Electrical connectors used to establish a secure, low-resistance connection between grounding conductors and grounding electrodes or other grounded objects.

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Engineering Analysis

Risks & Mitigation
  • Oxidation increasing contact resistance
  • Surface contamination causing poor connection
  • Mechanical wear reducing clamping force
FMEA Triads
Trigger: Oxidation or corrosion
Failure: Increased contact resistance leading to overheating
Mitigation: Use plated surfaces and periodic cleaning
Trigger: Insufficient clamping force
Failure: High resistance and arcing
Mitigation: Design for adequate spring pressure and torque specifications

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Contact resistance ≤ 0.1 mΩ per UL 467
Test Method
Micro-ohmmeter measurement per IEC 61230

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

Why is contact surface important in grounding clamps?

It ensures low resistance for fault current path, preventing overheating and ensuring safety.

What materials are used for contact surfaces?

Copper alloys, brass, or steel with tin/silver plating for corrosion resistance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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