Insulating Material: The conductor shall be coated with a dual film. The underlying insulation is based on polyurethane resins. The superimposed coating is based on polyamide resins.
Dimensions:
single:14-30AWG
minimum increase: 0.018mm-0.041mm
maximum overall: 0.284mm-1.692mm
heavy: 14-30AWG
minimum increase: 0.033mm-0.081mm
maximum overall: 0.307mm-1.732mm
Adherence And Flexibility: No cracks visible in the film coating
Elongation: Not less than 12%
Heat Shock: No cracks visible in the film coating after conditioning at 175°C
Dielectric Breakdown:
14-23.5 AWG: not less than 2470V
24-30 AWG: not less than 1070V
Continuity:
| BuildSelf-Bonding | SingleType 1 | Heavy Type 2 | Triple Type 3 | Quad |
| 14-24 AWG | 750 | 1500 | — | — |
| 24.5-28 | 500 | 1000 | — | — |
| Maximum Fault Count per 100 ft. | 25 | 10 | — | — |
Solderability: Insulation completely removed after immersion within the time and at the temperature specified:
| AWG Size | Temperature | Single and Heavy |
| 14-19.5 | 430ºC | 10 seconds |
| 20-23.5 | 430ºC | 8 seconds |
| 24-30 | 390ºC | 6 seconds |
Periodic Conformance Tests:
Solubility: Specimens immersed in xylene shall not soften sufficiently to expose the bare
conductor
Dielectric Breakdown At Rated Temperature: Average not less than 75% of the value required at room temperature
Class 155 Polyurethane Overcoated with Polyamide Round Aluminum Wire emerges as a reliable and adaptable solution for solderable applications across industries. Its blend of thermal resilience, electrical insulation, and solderability makes it a go-to choice for engineers and manufacturers seeking high-performance wiring solutions.