UL 60950-1 Accessibility Wedge Probe Set (S5366/S5370)

This UL 60950-1 compliant Accessibility Wedge Probe Set (S5366/S5370) is engineered for safety testing of information technology equipment, specifically addressing the requirements outlined in UL 60950-1 Figures NAF-2 and NAF-3. The set features precision-machined, rigid stainless steel wedge tips—the S5366 probe replicates the thin, narrow wedge profile specified in Figure NAF-2, while the S5370 probe simulates the wider wedge configuration defined in Figure NAF-3. These probes are designed to simulate the accidental insertion of foreign objects into equipment apertures, such as port slots, ventilation openings, and edge seams.

Each probe is paired with an insulating nylon handle, providing a safe, non-slip grip and ensuring operator protection during testing procedures. The handles are heat-resistant and electrically insulating. Both probes are applied with minimal force to verify that hazardous live parts or moving mechanical components within the equipment remain inaccessible, as mandated by international safety standards.

Manufactured to exacting dimensional tolerances with durable, corrosion-resistant materials, this probe set is an essential tool for manufacturers, testing laboratories, and quality control departments to validate compliance with global IT equipment safety regulations, including UL 60950-1 and its international equivalents.

Specifications

Test Procedures

1. Visually inspect both probes for any physical damage (e.g., bent wedge tips, cracked handles) prior to testing to ensure measurement accuracy.
2. Power on the information technology equipment under test and allow it to reach normal operating conditions.
3. Select the appropriate probe: S5366 for testing narrow gaps as per Figure NAF-2, or S5370 for testing wider gaps as per Figure NAF-3.
4. Securely grip the insulating nylon handle and carefully align the stainless steel wedge tip with the target aperture on the equipment.
5. Gently insert the wedge probe toward any internal hazardous parts, applying minimal force as specified in the standard.
6. Determine and record whether the wedge makes contact with live electrical components or moving mechanical parts, classifying the result as pass or fail.

Applications

1. Safety compliance testing of laptop port slots (e.g., USB-C, HDMI) using the S5366 probe per UL 60950-1 Figure NAF-2 requirements.
2. Verification of router and network equipment ventilation gaps with the S5370 probe to ensure internal wiring remains inaccessible.
3. Accessibility testing of server chassis narrow edge seams using the S5366 probe in accordance with UL 60950-1.
4. Quality control validation for desktop monitor and display bezel gaps (wider slots) with the S5370 probe during manufacturing processes.
5. Post-production safety audits of office equipment enclosures for compliance with international safety standards.