BS1363-2 Figure 16 Withdrawal Pull Gauges for Contact Effectiveness Verification

BS1363-2 Figure 16 Withdrawal Pull Gauges for Contact Effectiveness Verification constitute specialized dimensional inspection tools engineered to validate the mechanical contact integrity, structural conformity, and dimensional precision of 13A plugs and socket-outlets in strict accordance with BS 1363 standards, specifically as delineated in Figure 16 of BS 1363-2 (“13 A plugs, socket-outlets, adaptors and connection units – 13 A switched and unswitched socket-outlets. Specification”). The system comprises two distinct gauge configurations designed for targeted verification procedures, maintaining rigorous adherence to the standard’s specifications for dimensional parameters, tolerance limits, material composition, hardness properties, and surface finish requirements.

Manufactured from high-hardness materials exceeding 50HRC with minimal thermal expansion characteristics, these gauges ensure dimensional stability and measurement repeatability during contact effectiveness assessments through simulated insertion cycles and application of prescribed withdrawal forces. The design incorporates chamfered edges and conical surface sections as mandated by the standard to prevent damage to test specimens during verification procedures.

Technical Specifications

• Compliance Standard: BS 1363-2 (“13 A plugs, socket-outlets, adaptors and connection units – 13 A switched and unswitched socket-outlets. Specification”) Figure 16
• Gauge Configurations: a) Earthing socket contact verification gauge; b) Line and neutral current-carrying socket contact verification gauge
• Material Hardness: >50HRC (Rockwell C scale)
• Thermal Expansion Coefficient: Low (ensuring dimensional stability across temperature variations)
• Dimensional Units: All linear dimensions specified in millimetres (mm)
• Mass Requirement: 227 ±3g per gauge configuration
• Maximum σ Value: 22 (applicable to both gauge configurations)
• Key Compliance Attributes: Dimensions, tolerances, material properties, surface roughness parameters fully conform to BS 1363 standard requirements
• Dimensional Stability: Maintained through low thermal expansion coefficient materials
• Design Features: Incorporates chamfers and conical surface sections as specified in BS 1363-2

Test Procedure Guidelines

1. Prepare the socket-outlet sample for verification, ensuring absence of mechanical damage, particulate contamination, or wear patterns that could compromise contact effectiveness or measurement accuracy.
2. Select the appropriate gauge configuration (earthing socket contact gauge or line/neutral current-carrying socket contact gauge) based on the verification objective and socket contact type under assessment.
3. Execute the insertion and withdrawal procedure as prescribed in BS 1363-2, applying the specified force parameters while monitoring for compliance with dimensional and functional requirements.
4. Document verification results, noting any deviations from standard specifications for quality control records and compliance reporting.