BS EN 50075:1990 Gauge for Socket Safety Testing

BS EN 50075:1990 Gauge for Socket Safety Testing is engineered to verify the prevention of single-pole plug insertion into socket-outlets lacking a position rack, crucial for mitigating electrical shock risks in household and similar Class II equipment. Compliant with BS EN 50075:1990 Figure 4, it features precision-machined dimensions to simulate real plug insertion scenarios. Weighing 1000g, the gauge utilizes its own weight for testing: when positioned between socket pins for 1 minute, it should not contact the plug’s engagement face. Constructed from durable metal, it ensures repeated use and socket safety validation.

• Key Dimensions: 16.4±0.05mm (critical pin-spacing dimension); 12.5±0.05mm; 12.3±0.1mm (all precision-machined for standard compliance)
• Weight: 1000g (utilizes own weight for testing, no external force required)
• Material: High-strength steel (resists wear, maintains dimensional accuracy over time)
• Test Mechanism: Static load test: rests between socket pins for 1 minute to check engagement face contact
• Applicable Socket Type: Socket-outlets without position racks (for Class II-equipment plugs)

Test Procedures:

1. Inspect the gauge for dents, bending, or dimension wear to ensure it meets specifications.
2. Place the socket-outlet under test on a flat, stable surface (no power required).
3. Align the gauge’s contact points with the socket’s pins, letting it rest freely between them.
4. Leave the gauge undisturbed for 1 minute (per standard test duration).
5. Check if the gauge touches the plug’s intended engagement face on the socket.
6. Record results: “Pass” if no contact, “Fail” if contact occurs (indicating single-pole insertion risk).

Applications:

• Safety testing of non-rewirable two-pole sockets for Class II household appliances (e.g., electric kettles, toasters) per BS EN 50075:1990.
• Quality control for socket manufacturers to prevent non-compliant products from entering the market.
• Third-party certification testing…