NF C 61-314 Figure C6 Maximum Opening Verification Gauge for Standard V Sheet Cells

This NF C 61-314 Figure C6 Maximum Opening Verification Gauge for Standard V Sheet Cells is precision-engineered in strict compliance with the dimensional specifications outlined in NF C 61-314 Figure C6. Designed specifically to verify the maximum permissible opening of 16A contact tubes within standard V sheet cells, this gauge serves as an essential quality control instrument for electrical component manufacturers and testing laboratories.

The gauge enables verification that the cell opening dimensions of electrical contact components meet the rigorous requirements specified in NF C 61-314. The primary verification criterion requires that the gauge can be inserted into the contact tube cell without application of force, ensuring compliance with the standard’s dimensional tolerances. This verification process is critical for maintaining the safety, electrical compatibility, and performance reliability of electrical products manufactured in accordance with NF C 61-314 standards.

Technical Specifications

• Full compliance with NF C 61-314 Figure C6 standard requirements
• Designed for 16A contact tube applications
• Key verification diameter (D): 5.11 mm
• Dimensional tolerance: +0/-0.01 mm
• Engineered for interference-free insertion into contact tube cells (no force application permitted)
• Manufactured from high-precision materials ensuring dimensional stability and long-term durability
• Designed to match the structural and dimensional criteria of standard V sheet cells as specified in NF C 61-314 test procedures

Test Procedure

1. Inspect the gauge for any damage, deformation, or surface contamination. Verify that the gauge diameter and tolerance comply with NF C 61-314 Figure C6 specifications.
2. Prepare the 16A contact tube sample, ensuring the cell (alvéole) is clean, free from burrs, and undamaged to prevent interference with test results.
3. Secure the contact tube in a stable, well-illuminated fixture to maintain proper positioning during verification.
4. Align the gauge concentrically with the opening of the contact tube cell, ensuring proper axial alignment between the gauge and cell.
5. Attempt to insert the gauge into the cell using only gravitational force or minimal, gentle pressure—forced insertion is strictly prohibited per NF C 61-314 requirements.
6. Verify whether the gauge can be fully inserted into the cell without mechanical resistance, in accordance with the standard requirement “Il d… (truncated)