CEI 23-50 Fig.5 Test Probe for Notch, Hole, and Reverse Taper Inspection

The CEI 23-50 Fig.5 Test Probe is a precision inspection instrument designed for verifying compliance with Italian safety standard CEI 23-50 Fig.5 requirements for electrical lighting equipment. This specialized tool performs critical dimensional verification of notches, holes, and reverse tapers in lighting fixtures to ensure they meet specified safety parameters.

Engineered for laboratory and manufacturing quality control applications, the probe features a rigid, precision-machined stainless steel body with a right-angled sharp edge that provides accurate detection of non-compliant openings. The base configuration operates without cable integration, while an optional cabled variant is available for compatibility with low-voltage test supplies during comprehensive safety assessments.

Technical Specifications:

• Overall Length: Minimum 100mm (compliant with CEI 23-50 Fig.5 dimensional requirements)
• Edge Design: Right-angled sharp edge configuration (ensures precise detection of notches and reverse tapers)
• Cable Configuration: Base model (no cable); Optional cabled version available for low-voltage test supply compatibility
• Material: High-strength stainless steel construction (corrosion-resistant, maintains dimensional stability and edge sharpness)
• Tolerances: Linear dimensions: ±0.2mm (ensures alignment with CEI 23-50 Fig.5 specification requirements)
• Functional Compatibility: Independent operation capability; Cabled variant interfaces with low-voltage test supplies (e.g., LISUN SMT-529CV)

Standardized Test Procedures:

1. Conduct visual inspection of the probe for any deformation, edge degradation, or physical damage; verify length and edge sharpness meet CEI 23-50 Fig.5 specifications.
2. De-energize the lighting equipment under test and position it on a stable, level surface.
3. Identify target inspection areas: notches, holes, or reverse-tapered openings on the lighting fixture.
4. Secure the probe using the ergonomic grip (if equipped) and align the sharp edge with the target opening.
5. Execute controlled insertion of the probe to assess opening compliance (evaluate for excessive gaps or non-compliant taper configurations).
6. Document inspection results to verify adherence to CEI 23-50 Fig.5 regulatory requirements.

Primary Applications:

• Safety compliance testing of residential lighting fixtures (including ceiling fan lighting assemblies and wall sconces) for notch and hole verification per Italian market requirements.
• Regulatory compliance assessment for commercial lighting installations (including office downlighting systems and industrial luminaires) to validate opening dimensions meet CEI 23-50 Fig.5 specifications.
• Quality assurance verification in manufacturing environments producing lighting equipment for Italian market distribution.
• Third-party certification laboratory testing for lighting equipment safety validation against CEI 23-50 standards.
• Educational and training applications for electrical safety compliance procedures in technical institutions.

The instrument’s durable construction withstands repeated testing cycles while maintaining dimensional accuracy, making it essential for manufacturers, testing laboratories, and certification bodies verifying lighting equipment safety compliance for the Italian market according to CEI 23-50 regulatory standards.