EN 50075 Figure 2 Interchangeability Gauge

The BS EN 50075 Figure 2 Interchangeability Gauge is a precision inspection instrument designed for verifying the dimensional compliance and interchangeability of flat non-wirable two-pole plugs, in strict accordance with BS EN 50075:1991 “Specification for flat non-wirable two-pole plugs 2.5 A 250 V, with cord, for the connection of class II-equipment for household and similar purposes” Figure 2. This gauge ensures all critical dimensions, tolerances, material properties, hardness specifications, and surface finish requirements meet the rigorous standards for reliable interchangeability verification.

Technical Specifications

• Compliance Standard: BS EN 50075:1991 Figure 2
• Material Hardness: >50 HRC (Rockwell C scale)
• Material Properties: Low thermal expansion coefficient for dimensional stability
• Dimensional Accuracy: Maintains specified tolerances under operational conditions
• Surface Finish: Meets standard requirements for surface roughness
• Edge Configuration: Slightly rounded edges per specification
• Target Application: 2.5A 250V flat non-wirable two-pole plugs with cord
• Intended Use: Connection of class II-equipment for household and similar purposes
• Critical Dimensions with Tolerances: ø5.5 mm (0 / +0.05), ø4.07 mm (+0.05), 19 mm (±0.05)
• Primary Function: Verification of plug interchangeability compliance

Test Procedure

1. Prepare the 2.5A 250V flat non-wirable two-pole plug (with cord) for inspection, ensuring the surface is clean and free of contaminants.
2. Insert the plug into the gauge smoothly without applying excessive force.
3. Verify that the engagement face of the plug achieves full contact with the gauge surface.
4. Compliance Determination: If the plug inserts without undue force and achieves complete contact with the gauge surface, the plug meets the interchangeability requirements specified in the standard.

Applications

• Testing and inspection of interchangeability for 2.5A 250V flat non-wirable two-pole plugs with cord
• Quality control and interchangeability verification for plugs used in class II-equipment connections for household applications
• Compliance verification for manufacturers and testing laboratories