UL1056 PVC Wire

UL 1056 PVC Wire — 105°C, 600 Vac, Internal Wiring of Refrigerating Equipment

UL 1056 is a single-conductor appliance wiring material (AWM) with extruded PVC insulation, rated 105°C maximum at 600 Vac with a horizontal flame rating. Evaluated under UL Subject 758, it is designed specifically for internal wiring of indoor and outdoor refrigerating equipment, covering stranded conductor sizes from 20 AWG to 10 AWG with a single heavy-wall insulation specification: 60 mils minimum average thickness, 54 mils minimum at any point. CableApex supplies UL 1056 as a UL Recognized Component — file on record.

Purpose-Built for Refrigerating Equipment

Where most PVC hook-up wire styles carry a general appliance wiring permitted use, UL 1056 is limited to internal wiring of indoor or outdoor refrigerating equipment. That specificity matters in refrigeration system design: the 105°C maximum temperature rating accommodates wire routed near compressor housings, motor leads and hot-gas discharge lines where ambient temperatures routinely exceed the 60°C or 80°C limits of lower-rated PVC styles. The optional 60°C or 80°C oil rating covers wiring exposed to refrigerant oil inside the compressor compartment, a common requirement in hermetic and semi-hermetic compressor assemblies.

Heavy-Wall Single-Grade Insulation

Unlike styles such as UL 1032 whose wall thickness scales across seven conductor-size brackets, UL 1056 specifies a single uniform wall for the entire 20–10 AWG range: 60 mils minimum average, 54 mils minimum at any point. This thicker wall relative to the conductor size provides a more robust dielectric barrier and mechanical protection suited to the vibration and occasional contact with refrigerant fittings encountered in compressor wiring installations. The insulation is extruded PVC only; no covering, shield or jacket options are listed in the style, keeping the construction straightforward for sourcing and quality verification.

Stranded Conductor Construction

UL 1056 specifies stranded conductor throughout the 20–10 AWG range — solid conductors are not covered by this style. Stranding is the standard choice for wiring subject to vibration from compressor motors, as it resists fatigue cracking that solid conductors can develop under repeated mechanical stress. Conductor sizes 20 through 10 AWG suit the control wiring, fan motor leads and internal power circuits typical in residential and light-commercial refrigerating equipment.

Where UL 1056 Sits in the PVC Portfolio

Within CableApex’s PVC-insulated AWM range, UL 1056 occupies a specialist position at 105°C / 600 Vac with a refrigeration-specific permitted use. For general-purpose 600 Vac appliance wiring at 80–105°C, UL 1015 covers a wider conductor range in both solid and stranded construction. For higher-voltage internal circuits at 1000 Vac or 1200 Vdc, UL 1032 provides the same 90°C maximum with PVC insulation. When the end application is confirmed as refrigerating equipment and the conductor falls within 20–10 AWG stranded, UL 1056 provides the matching component recognition with its heavier PVC wall and 105°C rating.

Ordering Information

Marking follows UL Subject 758 marking requirements; RoHS/REACH documentation is available on request. CableApex supplies UL 1056 from 100 m per color, answering B2B inquiries within 12 hours with pricing, lead time and packing details. Browse the product pages below by AWG size, or use any product page inquiry form to submit your specification including conductor size, quantity and required insulation color.