UL 507 UL Probe for Film-coated Wire

The UL 507 PA135A Probe is a specialized safety tool designed to test the insulation integrity of film-coated wires in electric fans, blowers, and similar household/industrial air-moving equipment. It features a highly conductive brass probe tip—critical for detecting tiny cracks, pinholes, or defects in wire coatings that could cause electric leakage. Paired with an insulating nylon handle to protect testers from shock, it applies light, controlled pressure to mimic real-world use without damaging intact coatings. Strictly aligned with UL 507 requirements, it’s durable, dimensionally stable, and essential for manufacturers to ensure film-coated wires meet U.S. safety standards for fan and blower equipment.

Standards:

Specifications:
Probe Type: UL 507 PA135A Probe (for film-coated wire insulation integrity testing in fans/blowers)
Probe Tip Material: Brass (highly conductive, resistance ≤ 0.1 Ω; ensures accurate leakage detection; corrosion-resistant)
Handle Material: Nylon (fully insulating, heat-resistant up to 100°C; non-slip grip for precise pressure control)
Key Dimensions:
– Probe Tip Diameter: 1.0 mm ± 0.05 mm (ideal for small-diameter film-coated wires in fans)
– Effective Probe Length: 20 mm ± 0.2 mm
– Handle Length: 95 mm ± 0.5 mm
– Total Length: 115 mm ± 0.5 mm
Applied Force: No appreciable force (light contact only; avoids tearing or damaging intact wire coatings)
Core Function: Detects insulation defects (cracks, pinholes) in film-coated wires of electric fans, blowers, and air-moving appliances per UL standards

Test Procedures:
1. Inspect the probe (no bent tip, cracked handle, or poor conductivity) and connect it to a leakage detection instrument.
2. Prepare the film-coated wire (from fan/blower) – clean, dry, and secure on a non-conductive surface.
3. Hold the insulating handle and align the brass tip with the wire’s film coating.
4. Glide the probe lightly along the wire’s entire length, maintaining consistent contact.
5. Monitor the detection instrument for signals (indicating coating defects and electric leakage).
6. Record defective sections and confirm if the wire meets safety requirements (pass/fail).

Applications:
1. Safety testing of film-coated wires in household pedestal fans and table fans (per UL 507:2023 Figure 8.6).
2. Compliance checks for industrial blower wires (e.g., HVAC duct blowers) per UL 60335-1:2023 Clause 11.5.
3. Verification of film-insulated wires in ceiling fans and exhaust fans (kitchen/bathroom) for U.S. markets.
4. Quality control for portable tower fan wires during manufacturing to meet UL 60335-2-80:2023.
5. Post-production audits of commercial air circulator wires to ensure insulation integrity per UL 507 standards.

UL 507 UL Probe for Film-coated Wire

UL 507 UL Probe for Film-coated Wire