UL 3135 22 AWG — Selected Conductor Size Within the Style Range
This page covers UL AWM Style 3135 silicone rubber wire supplied at 22 AWG. The full Style range is 26 AWG through 12 AWG, so 22 AWG sits in the finer portion of that range — a size commonly specified where a lead needs to route through confined space inside the appliance while carrying a 200°C temperature rating.
UL Style 3135 is rated 200°C at 600 Vac with extruded silicone rubber insulation at 30 mils minimum average and 27 mils minimum at any point. The stated use is internal wiring of appliances where totally enclosed. Notably, the insulation wall is the same 30 mils across the entire 26–12 AWG range, so at 22 AWG the wall is proportionally substantial relative to the conductor — worth accounting for when planning routing clearance. For other conductor sizes, see UL 3135 Silicone Wire.
UL AWM Style 3135 — Specifications
| UL AWM Style | 3135 |
| UL Subject / Section | 758, Section 3 |
| Temperature rating | 200°C |
| Voltage rating | 600 Vac |
| Conductor range (Style scope) | 26 AWG – 12 AWG, solid or stranded |
| Conductor size (this page) | 22 AWG |
| Insulation | Extruded silicone rubber (SR) |
| Minimum average insulation thickness | 30 mils (0.76 mm) |
| Minimum insulation at any point | 27 mils (0.69 mm) |
| Flame rating | Horizontal flame; VW-1 vertical flame test available |
| Marking | Per UL Subject 758 marking requirements; confirmed for the qualified ordered construction |
| Use per UL Style file | Internal wiring of appliances where totally enclosed |
| RoHS / REACH | Requirements confirmed according to ordered materials and documentation requirements |
Specifying 22 AWG
22 AWG is selected when the equipment design calls for this conductor size at the lead position in question. Routing space, termination hardware, current requirements and the overall equipment design determine whether it is appropriate — the conductor size on its own does not establish suitability, and current-carrying requirements should be confirmed against the applicable engineering data for the equipment.
Where 22 AWG is confirmed, the remaining construction is settled at order stage. The UL Style file defines the insulation and the conductor size range but not the conductor material, finish or strand construction:
- Solid or stranded. Both are within the UL Style 3135 scope. Selected 22 AWG constructions can be supplied with stranded bare or tinned copper according to the confirmed order.
- Conductor finish. Bare or tinned copper is confirmed during quotation. Tinned conductors may be preferred for soldering processes, and tin plating helps reduce surface oxidation during storage and handling.
- Strand construction. Where your assembly requires a specific strand configuration, specify it at enquiry so it can be checked against production capability.
- Colour. Standard silicone colours are available; where multiple lead positions require identification, send a colour list with quantity per colour.
Silicone Rubber at 22 AWG
Silicone rubber insulation provides flexibility and high-temperature capability within the 200°C rating of the Style. At 22 AWG the combination of a fine conductor and a 30 mils insulation wall produces a lead that handles readily during assembly while carrying the temperature rating of the material.
Silicone behaves differently from PVC under processing tooling — it is softer and compresses more readily, which affects stripper blade clearance and crimp settings. Confirm the insulation dimensions at enquiry so tooling can be set against the actual ordered construction rather than a nominal figure.
Totally Enclosed Appliance Internal Wiring
The UL Style 3135 file states the use as internal wiring of appliances where totally enclosed. This condition applies to the finished installation and is the boundary within which this product is supplied:
- Protected internal appliance leads routed entirely within the appliance housing
- Protected internal connections between components inside appliance assemblies
- Protected internal control wiring within a totally enclosed appliance assembly
- OEM appliance wiring assemblies where 22 AWG silicone is a repeated lead specification
- Harness production where the finished assembly is installed as totally enclosed appliance internal wiring
Suitability for a specific appliance design depends on the equipment, the routing arrangement, the ordered construction and the applicable equipment-level evaluation. UL Style 3135 is not supplied or positioned as control panel wire, industrial equipment wiring, field wiring, building wire or external wiring.
Processing Notes
Where 22 AWG silicone wire is processed as part of an assembly operation, settle the following at enquiry:
- Cutting. Fixed-length cutting can be arranged where the assembly uses repeated lead lengths. Specify the required tolerance.
- Stripping. Confirm the insulation dimensions so stripper settings can be calibrated to the ordered construction. Silicone requires different blade clearance from PVC at the same nominal wall.
- Termination. Confirm the terminal hardware so the conductor construction can be checked against the crimp barrel range, or specify a tinned finish where soldering is used.
- Reel and spool format. Confirm the format and length your assembly line works with.
UL Marking and Order Documentation
CableApex supplies UL AWM Style 3135 construction from factory production. UL marking and Style-specific documentation depend on the qualified ordered construction, and both should be confirmed during quotation. Where RoHS, REACH or other documentation is required, specify the requirement at enquiry so availability can be confirmed for the ordered materials and construction.
Ordering Information
Send the following so a quotation can be prepared against a defined construction:
- 22 AWG confirmation
- Conductor construction — solid or stranded
- Bare or tinned conductor requirement
- Insulation colour, with quantity per colour
- Total quantity
- Reel or spool length
- Cut length and tolerance, if applicable
- Stripping requirement
- Termination requirement
- Marking requirement
- Documentation requirement
- Destination
Related UL AWM Styles
Buyers specifying UL 3135 22 AWG may also consider: UL 3135 Silicone Wire for the full 26–12 AWG Style range and other conductor sizes; and UL 3172 (200°C / 600 Vac, extruded silicone rubber with glass or aramid braid covering, 26–18 AWG — same temperature and voltage class with a braid covering, where the routing arrangement calls for one). The wider ranges are available under Silicone Rubber Wire and AWM Wire.
