UL 507 Probe for Film-coated Wire

The UL 507 PA135A Probe is engineered to assess the insulation integrity of film-coated wires. It serves as a measuring instrument, as specified in Table 9.1 and depicted in Figures 9.1 and 9.2, to evaluate accessibility to uninsulated live parts and film-coated wires through openings, without assessing material strength. No force should be applied to the probe during accessibility evaluation.

Specifications:

• Probe Type: UL 507 PA135A Probe (for film-coated wire insulation integrity testing in fans/blowers)
• Handle Material: Nylon (fully insulating, heat-resistant up to 100°C; non-slip grip for precise pressure control)
• Key Dimensions:
  • Head Length: 12.7mm (1/2 inch)
  • Total Length: 101.6mm (4 inch)
  • Head Radius: 14.3mm (9/16 inch)
  • Former Head Diameter: R4.8mm (3/16 inch)
  • Tail Diameter: 19.1mm (3/4 inch)

Test Procedures:

1. Inspect the probe (ensure 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:

• Safety testing of film-coated wires in household pedestal fans and table fans (per UL 507:2023 Figure 8.6).
• Verification of film-insulated wires in ceiling fans and exhaust fans (kitchen/bathroom) for U.S. markets.
• Post-production audits of commercial air circulator wires to ensure insulation integrity per UL 507 standards.

UL 507 Safety Probe for Film-coated Wire

UL 507 Safety Probe for Film-coated Wire Tags: SMT-PA135A, UL 1026, UL 1278, UL 507