Heating Cables

Overview

SunAura heating cables deliver reliable, regulated warmth wherever power needs to be delivered along a line — under floors, inside pipes, across roofs, or wrapped around tanks and equipment. Built with durable alloy-resistance conductors and rated IPX8, our cables handle the toughest conditions: wet screed, standing water, outdoor snow and continuous industrial duty.

Available with fixed-resistance or PTC self-regulating heating cable range, SunAura cables are used by heating contractors, industrial maintenance teams and OEM manufacturers across more than 50 countries.

Key Features

• IPX8 waterproof rating — double-insulated, shielded construction lives in wet screed, standing water and outdoor snow duty.
• Double conductor, single cold tail — only one end needs wiring and no return loop, so each loop is faster and cleaner to install.
• Alloy-resistance core, 10–30 W/m selectable — stable, durable heating output with a rated 15–25 year, maintenance-free service life.
• Fixed-resistance or PTC self-regulating — PTC cable trims its own power as it warms, so overlapped runs cannot overheat; preferred for pipe trace heating.
• One family for many jobs — underfloor loops, pipe antifreeze, roof and driveway snow melting, equipment and tank insulation.
• Matched controls — pairs with SunAura WiFi/Tuya thermostats, floor sensors or snow/ice sensors, one per application.

Key Specifications

Applications

• Underfloor heating — embedded in screed or tile adhesive for rooms and wet areas.
• Pipe antifreeze — self-regulating trace heating cable keeps water and process pipes above freezing point all winter.
• Roof & road snow melting — prevents ice dams, icing and slip hazards on roofs, gutters, ramps and driveways. Explore our snow melting mat range.
• Equipment & tank insulation — maintains process temperatures and prevents material solidification, ensuring stable production.
• Warehouse antifreezing — protects stored goods and sprinkler systems in cold storage environments.

Why PTC Cable Is Safer

PTC (positive temperature coefficient) cable automatically reduces its own power as temperature rises, preventing overheating even where sections overlap or are covered by insulation. This self-limiting behaviour removes the need for complex thermal cut-outs in many installations and is the preferred choice for pipe trace heating and safety-critical applications.

Frequently Asked Questions

In This Range: Twin Conductor, Self-Regulating PTC and Silicone Heating Cable

SunAura manufactures the three heating cable families buyers ask for most, all from one Qingdao factory with the same test and compliance file behind them:

Twin conductor heating cable is the renovation favourite: both cores carry current in one flat, double-insulated profile, so the run returns to the thermostat without a separate cold tail path. Compared with single conductor cable, the twin core halves the installed cable length in a room, which makes it the practical choice for bathrooms and kitchens where the loop must turn tightly. See the twin conductor heating cable guide for the layout table.

Self-regulating PTC heating cable reduces its own output as temperature rises, which makes it the safe default for pipe freeze protection, roof de-icing and any application where the cable may be left switched on unattended. The PTC mechanism and its overheating protection are explained in the self-regulating heating cable PTC guide.

Silicone heating cable adds chemical resistance and flexibility for the industrial side of the range — freeze protection on process lines, marine and food environments where PVC jackets are not accepted. It is covered in the silicone heating cable article with the temperature and IP ratings.

Whichever family fits the project, the cable arrives with the batch record and the CE, RoHS, LVD and EMC documentation, per SunAura factory records.

Double Conductor Electric Heating Cable

Our double conductor heating cable is a flexible, durable heating solution for underfloor heating, pipe frost protection, roof de-icing and snowmelt applications. The double conductor construction means only one end needs to be connected — a single cold-tail connection point simplifies wiring for both professional installers and experienced DIYers.

• Double conductor construction — only one end needs wiring; no need to return the cable to the start point.
• Single cold tail — one connection point for the whole loop, faster and cleaner installation.
• Alloy resistance core — stable output over time with excellent durability.
• IPX8 rated insulation — suitable for embedded installation in screed and adhesive.
• Multi-purpose — underfloor heating, pipe antifreeze, roof and road snow melting, equipment insulation.
• 15–25 year service life — maintenance-free operation.

For pipe antifreeze and snowmelt projects, our engineering team provides cable-length calculations based on your pipe diameter, thermal loss and climate zone.

Specifying a heating cable for pipe antifreeze, roof de-icing or screed-embedded underfloor heating? This section covers the purchasing side of the product: factory-direct wholesale pricing, custom-length and custom-wattage production, OEM element supply, and how our engineering team calculates the cable run for your project. Because our cables are IPX8 rated and built as double-conductor elements with a single cold tail, they are bought by heating contractors, industrial maintenance teams and OEM manufacturers in more than 50 countries — and the information below shows how to order them correctly.

Factory-Direct Wholesale Pricing & How to Buy

SunAura heating cables are sold factory-direct from our Qingdao production base, so wholesale price and bulk discounts reflect the actual manufacturing cost. Fixed-resistance cable is ordered to length, PTC self-regulating cable is cut on site, and the output is selectable at 10–30 W/m — all of which change the quotation. Send us your application (floor, pipe, roof or equipment), dimensions and climate zone, and our engineers will calculate the required length and return a same-day quote.

To start an enquiry, contact our sales team with your project parameters — or message us on WhatsApp for a fast reply about stock coils and engineering support.

Ordering & Shipping Process

Cable orders follow a technically checked routine. First, tell us the application: embedded underfloor heating needs loop spacing and room dimensions; pipe antifreeze needs pipe diameter, insulation thickness and the minimum winter temperature; roof and driveway snow melting needs area, pitch and a snow/ice sensor plan; equipment and tank heating needs the surface and target temperature. Second, our engineering team calculates the total cable length and wattage, checks single-circuit load limits, and recommends the matching thermostat or sensor. Third, we manufacture to length, test resistance and insulation, and pack coils in export cartons with the CE/RoHS documents. Fourth, goods ship by sea, air or express courier under EXW or FOB terms.

For maintenance teams and OEM customers we also supply complete kits — cable, fixing clips, connection kits and controllers consolidated into one box — which avoids on-site part sourcing. Drop shipping is available for selected trade partners; ask whether your region qualifies.

Customization & OEM Support

As the element manufacturer, we customise cables in-house: fixed-resistance or PTC self-regulating constructions, 110 V or 220–230 V builds, selectable output from 10–30 W/m, custom coil lengths, moulded or field-accessible end connectors, and private-label packaging for brands. PTC cable is especially popular for OEM trace-heating products because its self-limiting behaviour removes many external thermal cut-outs. Complete element and kit programmes for appliance manufacturers, pipe-hose producers and greenhouse builders are handled by our OEM team.

Applications & Installation Scenarios

Pipe antifreeze — trace heating keeps water and process pipes above freezing all winter; PTC cable is preferred here because overlapping runs cannot overheat. Roof and driveway snow melting — embedded in roof valleys, gutters, ramps and driveways, the IPX8 cable prevents ice dams and slip hazards when paired with a suitable snow/ice sensor. Underfloor heating — the same double-conductor cable can be embedded in screed or tile adhesive for rooms and wet areas. Equipment and tank insulation — maintains process temperatures and prevents material solidification in production. Warehouse antifreezing — protects stored goods and sprinkler systems in cold environments.

For tiled floors, many installers prefer the pre-spaced 160 W heating mat under tile because cable spacing is already guaranteed on the mesh. For dry wood floors, the graphene heating film sits much thinner than cable and warms up faster. The full product family is listed on the underfloor heating category page, with real layouts on our applications page and quick answers in the FAQ hub.

Running Costs & Control Options

The beauty of cable heating is that you pay only for the length you actually need. Fixed-resistance loops are sized per circuit so there is no over-specification, and PTC self-regulating cable trims its own output as surfaces warm, which avoids wasting energy on covered or overlapped sections. Control is matched to the job: embedded underfloor loops use a wall thermostat with floor sensor, pipe trace heating uses a thermostat or contact thermostat set near the freezing mark, and roof or driveway snow melting runs from a snow/ice sensor so it only activates when precipitation arrives. WiFi smart models allow app scheduling for the underfloor zones, while outdoor systems stay fully automatic.

Safety & Installation Best Practice

IPX8-rated insulation means the cable can live in wet screed, standing water or outdoor conditions, but good practice still matters: never shorten fixed-resistance cable on site (cutting changes resistance and wattage), keep the circuit within its single-loop load limit, fix the double-conductor run with the recommended clips at the stated spacing, and measure resistance before and after embedding so any damage is caught before the finish floor goes down. For PTC runs, overlapping is harmless — the self-limiting behaviour is exactly what makes overlapping safe — but the cold tail must still be terminated in a dry, accessible junction.

Warranty & After-Sales Support

Our cables carry a rated service life of 15–25 years and maintenance-free operation, backed by CE and RoHS certification under ISO 9001 manufacturing. Because so many installations are one-off engineering jobs, the after-sales promise is practical: send us the circuit drawing, the measured resistance and the symptom, and our engineers will help you trace a fault remotely rather than sending parts blindly. For OEM programmes we keep element specifications and test records on file across the product’s lifetime, so replacement coils match the original build exactly when a production line expands.

Why Contractors Specify Our Cable Repeatedly

After the first project, most contractors come back for three reasons: the single cold-tail connection makes every loop faster to wire, the engineering team sizes each run instead of selling a fixed kit, and the IPX8 rating removes any second-guessing about wet screed or outdoor exposure. For maintenance teams, the same cable family spans floor, pipe and roof jobs, so one supplier and one part number culture across the site simplifies spares, training and warranty claims.

Purchasing & Installation FAQ

FAQ

1. What is the difference between fixed-resistance and PTC heating cable?

Fixed-resistance cable is ordered to exact length because cutting changes its resistance and wattage, while PTC self-regulating heating cable can be cut to length on site and automatically reduces its own power as it warms up. PTC is preferred for pipe trace heating and overlapped runs; fixed-resistance is the economical choice for planned loops such as embedded underfloor heating.

2. How should heating cable be fixed when embedding it in screed?

The cable is laid in the calculated loop pattern and held with fixing clips at the stated spacing, keeping the two conductors evenly separated, then covered with screed or tile adhesive. Our heating cable in screed installation guide includes the loop drawing, clip positions and the before-and-after resistance checks that prove the loop survived the pour.

3. Can the cable used for pipe antifreeze be buried outdoors or underground?

Yes — with an IPX8 insulation rating, the cable is designed for wet, outdoor environments including buried trace runs, wet screed and standing water. A heating cable for pipe antifreeze outdoor use is always paired with a suitable thermostat or contact thermostat and protected by the local earth-leakage requirement for wet circuits.

4. What wattage do I need for roof and gutter snow melting?

Output is selectable from 10–30 W/m depending on roof geometry, gutter size and climate zone, and the run is controlled by a snow/ice sensor rather than a simple timer. Tell us the roof valley, gutter and driveway areas, and we will size both the roof deicing cable wattage and the sensor layout for you.

5. How is the single cold tail connected to the power supply?

Because this is a double-conductor cable, only one end needs wiring — the cold tail runs back to a junction box near the thermostat, and there is no return loop to the start point. A qualified electrician finishes the double conductor heating cable cold tail connection, and the circuit is tested before the cable is embedded.

6. Does a driveway snow melting circuit need special protection devices?

Outdoor wet circuits are always installed with the earth-leakage protection required by local wiring rules, and the snow/ice sensor switches the circuit only when precipitation arrives. For your driveway snow melting cable installation we can recommend the sensor and controller that match your supply and climate.

7. Can I order custom-length heating cable coils for OEM equipment?

Yes. We regularly supply custom heating cable OEM programmes: fixed lengths, chosen wattages, custom connectors and sleeves, and private-label kits for manufacturers. Send us the target surface, temperature range and voltage, and we will develop the coil spec rather than selling you a standard off-the-shelf loop.

8. What conditions can the IPX8 heating cable survive outdoors?

The IPX8-rated double-insulated, shielded construction is designed for continuous wet and outdoor duty — snow, standing water, wet screed and industrial environments — with a rated service life of 15–25 years. It is the IPX8 heating cable outdoor rating combined with PTC self-limiting behaviour that makes it trusted on roofs, ramps and pipelines in more than 50 countries.

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