IEC 60335-1 20.2 Test Probe B with Diameter 50 mm Circular Stop Face

 

1. Stop Face Specification Circular shape, diameter: 50mm
2. Key Dimensions Insulating guard: ø12mm; Handle section: ø75mm; Overall length: 160mm
3. Precision Tolerances Cylindrical radius (R2): ±0.05mm; Spherical radius (R4): ±0.05mm; All edges chamfered
4. Material Composition Metal components: Durable heat-treated steel (for wear resistance); Guard/handle: High-quality insulating material
5. Structural Features Articulated joints (for smooth insertion into gaps); Integrated insulating guard (to limit over-insertion)

 

Test Procedures:
1. Inspect the probe for damage (e.g., bent metal, cracked insulation) and confirm all dimensions meet specs.
2. Power off the electrical appliance under test and place it on a stable, level surface.
3. Identify potential access points to hazardous parts (e.g., gaps in enclosures, exposed components).
4. Hold the probe by its insulating handle, align the circular stop face with the appliance surface, and gently insert the probe into target access points.
5. Check if the probe can reach hazardous parts; record results to assess compliance.
6. After testing, clean the probe with a dry cloth and store it in a protected case to avoid damage.

 

Applications:
1. Safety testing of large household appliances (e.g., refrigerators, washing machines) to prevent access to hazardous live parts.
2. Compliance checks for kitchen appliances (e.g., electric ovens, microwaves) to verify protection against mechanical hazards.
3. Quality control during production of small electrical appliances (e.g., vacuum cleaners, electric irons).
4. Third-party laboratory testing for appliance certification (e.g., CE, UL) per IEC 60335-1 requirements.
5. Post-production audits to ensure consistent safety performance across appliance batches.