BS 546 Figure 3 Go Gauge for Plug

BS 546 Figure 3 Go Gauge for Plug is a precision-engineered testing instrument designed to verify the structural and dimensional compliance of plugs with BS 546 standards, as specified in Figure 3 of BS 546 (“Two-pole and earthing-pin plugs, socket-outlets and adaptors. Specification”). It adheres strictly to the standard’s requirements for dimensions, tolerances, material properties, hardness, and surface roughness, featuring a specialized design with key structural elements like a radius struck from the pin circle centre. With a material hardness exceeding 50HRC and a low thermal expansion coefficient, the gauge ensures exceptional dimensional stability and reliable performance, enabling accurate validation of whether plugs meet the “go” criteria for proper fit and conformity.

Specifications

• Compliance standard: BS 546 (“Two-pole and earthing-pin plugs, socket-outlets and adaptors. Specification”) Figure 3
• Gauge type: Go gauge (for plug dimensional and structural verification)
• Material hardness: Over 50HRC
• Material thermal expansion coefficient: Low
• All linear dimensions: Specified in accordance with BS 546 Figure 3 requirements
• Key design feature: E radius struck from the pin circle centre
• Key attributes (dimensions, tolerances, material, surface roughness): Fully compliant with BS 546 standard requirements
• Dimensional stability: Stable and reliable due to low thermal expansion coefficient

Test Procedures

1. Prepare the plug sample for testing, ensuring it is free from damage, deformation, dirt, or debris that could affect test accuracy.
2. Inspect the Go gauge to confirm its surface is clean, free from wear or misalignment, and all structural features (including the E radius) meet BS 546 Figure 3 specifications.
3. Align the plug sample with the Go gauge, ensuring proper positioning of the plug’s pins and body relative to the gauge’s reference points.
4. Attempt to fit the plug into the gauge smoothly, following the standard’s implied testing methodology.