What is the primary application for UL 3172 wire?

According to the official UL standard, UL 3172 wire is specifically rated for the internal wiring of appliances.

What are the temperature and voltage ratings for UL 3172?

UL 3172 features a maximum continuous temperature rating of 200°C and a voltage rating of 600 Vac. It also passes the horizontal flame test.

What is the insulation material of UL 3172 wire?

The primary insulation is extruded Silicone Rubber with a minimum average thickness of 30 mils. It is further protected by an outer covering of glass or aramid braid.

UL 3172 Silicone Fiberglass Wire

UL 3172 Silicone + Glass/Aramid Braid Wire (200°C, 600V)

UL 3172 is a silicone rubber insulated wire with a glass or aramid braid covering, rated 200°C and 600V AC under UL AWM Style 3172, supplied as a UL Recognized Component — file on record. It is used for the internal wiring of appliances where a 200°C temperature rating is required together with a braided outer covering for added surface protection at routing contact points. It is commonly selected where the operating temperature and routing conditions exceed many PVC or XLPE internal wiring options.

Material Construction

Primary Insulation: Extruded silicone rubber, 30 mils minimum average thickness, flexible across its rated range with 600V AC dielectric strength.
Outer Covering: One or more glass or aramid braid fibrous coverings (SF-2 type), providing added surface protection for the silicone insulation at routing contact points within protected internal wiring.

Technical Specifications

UL Style	3172 (UL Subject 758)
Rated Voltage	600V AC
Rated Temperature	200°C
Conductor Size	26 AWG – 18 AWG (solid or stranded)
Insulation	Extruded silicone rubber, 30 mils min average
Outer Covering	One or more glass or aramid braid fibrous coverings
Flame Rating	Horizontal flame
Primary Application	Internal wiring of appliances

UL 3172 vs UL 3135

UL 3172 and UL 3135 share the same 200°C / 600V silicone rubber insulation at 30 mils. The difference is the covering: UL 3172 adds a glass or aramid braid for added surface protection at routing contact points, while UL 3135 is bare silicone rubber without an outer braid, specified for totally enclosed routing where a braided covering is not required.

To request a quotation, send the AWG size, conductor type (solid or stranded), braid requirement (glass or aramid), voltage, temperature requirement, colour, quantity, and a brief description of the application. Quotations are returned within 24 hours, and mixed-AWG orders are accepted on a single shipment.