UL 5390 Mica-Glass Wire, 550°C 300V
UL 5390 is a UL-certified mica-glass wire rated 550°C and 300 V AC for internal equipment wiring. Its high-temperature insulation system combines mica with a treated fiberglass braid around the conductor.
- Voltage: 300 V AC
- Temperature: 550°C
- Insulation / covering: mica composite with treated fiberglass braid
- Size selection: 24–4 AWG style range; table: 24–14 AWG
- Certification: UL-certified AWM; UL 758
UL 5390 wire selection
UL 5390 is a UL-certified mica-glass wire rated 550°C and 300 V AC for internal equipment wiring. Its high-temperature insulation system combines mica with a treated fiberglass braid around the conductor.
The dimension table gives six stranded nickel-coated copper configurations from 24 AWG to 14 AWG. Every row identifies UL 5390 with the wire size and includes strand count, finished diameter, approximate weight and minimum bend radius. A separate thickness schedule covers the wider 24–4 AWG style range. This keeps dimensioned constructions distinct from the broader conductor sizes permitted by the style.
For a hot-zone equipment lead, confirm the temperature at the wire and termination, the required operating voltage and the space available for a supported route. The 550°C rating does not increase the 300 V voltage rating. The optional stainless-steel braid shield is a separate construction choice and should be stated on the order if required; it is not included in the unshielded dimension table.
See the Specifications tab for the model and size tables. Browse the high-temperature cable range for related constructions. Compare the 450°C MGT mica-glass wire and the separate 600 V UL 5359 construction.
Construction
UL 5390 uses the following conductor and insulation system. The diagram illustrates the layer sequence; select the conductor construction and covering shown in the required size specification.
| Component | Construction detail |
|---|---|
| Conductor | Stranded 27% nickel-coated copper in the dimensioned construction |
| Insulation | Mica-glass composite |
| Outer covering | Treated fiberglass braid |
| Optional style construction | 304 stainless-steel braid shield |
Applications
UL 5390 is intended for internal equipment wiring requiring a 550°C mica-glass construction at 300 V AC. Review the hot-zone route, terminal materials and mechanical protection together before selecting the conductor size.
UL 5390 replacement selection
For replacement enquiries, include the existing wire marking and the equipment connection drawing so the conductor, insulation and terminal arrangement can be matched.
Specifications
| Parameter | Specification |
|---|---|
| UL style | UL 5390 |
| Voltage rating | 300 V AC |
| Temperature rating | 550°C |
| Insulation / covering | mica composite with treated fiberglass braid |
| Conductor size coverage | 24–4 AWG style range; table: 24–14 AWG |
| Construction | Single conductor with non-extruded insulation |
Unshielded 550°C, 300 V construction dimensions for selection. Values are nominal; the quotation drawing defines the supplied construction.
| Model and conductor size | Strands | OD (mm) | OD (in) | Weight (kg/km) | Weight (lb/1000 ft) | Min. bend radius (in) |
|---|---|---|---|---|---|---|
| UL 5390 24 AWG | 7 | 2.03 | 0.080 | 7.22 | 5 | 0.64 |
| UL 5390 22 AWG | 7 | 2.21 | 0.087 | 8.86 | 6 | 0.70 |
| UL 5390 20 AWG | 10 | 2.34 | 0.092 | 10.37 | 7 | 0.74 |
| UL 5390 18 AWG | 16 | 2.64 | 0.104 | 15.30 | 10 | 0.83 |
| UL 5390 16 AWG | 26 | 3.05 | 0.120 | 22.49 | 15 | 0.96 |
| UL 5390 14 AWG | 41 | 3.30 | 0.130 | 29.69 | 20 | 1.04 |
Style construction thicknesses are shown in mils; 1 mil = 0.0254 mm. Nominal finished dimensions are listed separately.
| Model and conductor group | Minimum average composite wall (mils) | Minimum point wall (mils) |
|---|---|---|
| UL 5390 24–12 AWG | 25 | 22 |
| UL 5390 11–4 AWG | 33 | 30 |
Selecting the specified construction
Specify UL 5390 with AWG, conductor material, 300 V AC duty and any shield requirement. Use the selected row for nominal OD, weight and bend radius, and request a drawing for sizes beyond the dimensioned table.
Standards
TEBAOFLEX UL 5390 wire is UL-certified appliance wiring material.
| Item | Requirement or reference |
|---|---|
| Certification | UL-certified AWM |
| Style designation | UL 5390 |
| Construction standard | UL 758 — Appliance Wiring Material |
| Style flame classification | Horizontal flame |
Identify the UL style, conductor size, voltage and temperature grade on the purchasing specification. Include the required product identification and certification documents with the enquiry.
Request a cable recommendation and quotation
Send the required services, cable length, mechanical duty, environment, termination and quantity. Our team will review the application before quoting.
- Include the product name or SKU plus the required cable length and quantity.
- Attach a specification, drawing or data sheet when available.