CEI 23-50 C6 Calibration Gauge for Socket Expansion Inspection

This CEI 23-50 C6 calibration gauge (formerly CEI UNEL 09320-64) is a precision inspection instrument designed to verify the maximum permissible expansion of earth sockets in S31-type plugs and phase sockets in P30-type sockets, in strict compliance with the CEI 23-50 standard for household and similar electrical applications. It serves as an essential quality control and safety verification tool for electrical connection components, ensuring that socket dimensions remain within specified tolerance limits to maintain reliable electrical contact, stable grounding performance, and proper mechanical compatibility between mating connectors. This dimensional verification prevents potential hazards including poor electrical connections, overheating, and equipment failure.

Specifications:

• Compliance: CEI 23-50 “Spine e prese per usi domestici e similari – Parte 1: Prescrizioni generali” C6 (formerly CEI UNEL 09320-64)
• Application: Inspection of maximum permissible expansion for earth sockets of S31 plugs and phase sockets of P30 sockets
• Critical dimension: 6.4^+0.01 mm
• Functional requirement: The gauge shall not penetrate beyond the specified insertion depth, verifying that socket expansion does not exceed standard limits
• Material: High-precision steel with dimensional stability for repeated calibration cycles
• Tolerance: Tightly controlled dimensional accuracy meeting standard precision requirements for reliable expansion detection

Test Procedures:

• Prepare the test specimen (S31 plug earth socket or P30 socket phase socket), ensuring the socket area is clean, undamaged, and free from debris, deformation, or excessive wear
• Inspect the calibration gauge to confirm dimensional accuracy at 6.4^+0.01 mm, with no deformation, corrosion, or surface damage affecting measurement integrity
• Align the gauge with the target socket (earth socket of S31 plug or phase socket of P30 socket) along the natural insertion axis specified in the standard