CEI 23-50 C5 Standardization Sheet (Formerly CEI UNEL 09319-64 2A and 2B) Pin Spacing Calibration Gauges for S30, S31, and S32 Plugs

This CEI 23-50 C5 Standardization Sheet (Formerly CEI UNEL 09319-64 2A and 2B) Pin Spacing Calibration Gauges for S30, S31, and S32 Plugs is a set of specialized calibration instruments engineered to verify the pin spacing dimensions of S30, S31, and S32 plugs, ensuring strict compliance with the CEI 23-50 standard (formerly CEI UNEL 09319-64 2A and 2B). It serves as an essential quality assurance instrument for plugs utilized in household and similar applications, guaranteeing that both internal and external pin spacing conforms to precise dimensional specifications. Accurate pin spacing is critical for reliable compatibility with corresponding sockets, stable electrical contact integrity, and prevention of connection failures or safety hazards.

Specifications

• Compliance: Conforms to CEI 23-50 “Spine e prese per usi domestici e similari – Parte 1: Prescrizioni generali” C5 (formerly CEI UNEL 09319-64 2A and 2B)
• Application Scope: Specifically designed for dimensional inspection of pin spacing on S30, S31, and S32 plugs
• Gauge Types: Fork gauge (Calibro a forchetta, Type A) and flat gauge (Calibro platto, Type B)
• Fork Gauge (Type A) Dimensions (mm):
  • Curved prongs (Spigli arcantati): 24.08-0.02
  • Rounded prongs (Spigli arrotondati): 13.92+0.02
  • Additional dimension: 5±0
• Core Function: Fork gauge verifies external pin spacing; flat gauge verifies internal pin spacing
• Key Requirement: Both gauges must operate without requiring force during the inspection process
• Unspecified Dimensions: Not constrained by the standard’s unified dimensional requirements

Test Procedures

1. Prepare the S30, S31, or S32 plug under test, ensuring its pins are clean, intact, and free from deformation or misalignment.
2. Inspect both the fork gauge (Type A) and flat gauge (Type B) to confirm they meet the specified dimensional requirements and exhibit no wear or damage.
3. Use the fork gauge (Type A) to verify the external spacing of the plug’s pins: Align the gauge’s prongs with the outer edges of the pins and position it without applying force.
4. Verify that the fork gauge fits smoothly… (truncated)