T2Black-12 Floor Heating Cable
Description
Raychem T2Black-12 is a floor heating cable with a constant power output of 12 W/m. It is a pre-terminated heater featuring dual twisted wires and a 2.6 m cold lead attached at one end. The heating cable should be embedded in a filler layer of approximately 10-15 mm. T2Black-12 is an ideal floor heating system for installation in newly constructed buildings or for renovation projects, suitable for conservatories or cold rooms (refrigeration rooms). The T2Black-12 cable is particularly well suited for use in combination with anti-fracture membranes. T2Black-12 kits are available in variants containing a digital electronic thermostat (NRG-DM) and variants without a thermostat. All T2Black-12 cables are delivered pre-terminated and on a spool for ease of installation. They are packed in a robust and handy installer-friendly box containing glue sticks for easy fixing to the subfloor and a conduit for sensor installation.
Warranty Information: 12 Years Total Care Warranty covers all Raychem under floor heating products when installed by an authorized electrical installer. 20 Years Total Care Warranty is valid if the installation is carried out by a Certified PRO installer. Read more about Certified PRO and favourable warranties and conditions at www.chemelex.com.
Advantages
The design phase
- Easy design: One cold lead connection due to dual wire cable design.
- Different outputs per m² can be obtained by varying spacing (minimum spacing is 50 mm).
- Cable flexibility: This cable is particularly suitable for adapting to all room shapes.
- Compatible with all stable subfloors, e.g., concrete, anhydrite, asphalt, plaster, ceramic underfloor, and wooden subfloors.
- Following floorings can be applied: Tiles, Marble, Stones, Plastic matting, Wood, Laminate.
- Maximum thickness: 30 mm.
- λ-value: 1.0 W/mK.
The installation phase
- Due to the dual wires, the T2Black-12 cable has only one cold lead connection, enabling easy lay-out and installation.
- Easy to adapt to special room shapes or obstacles; spacing can be varied to a minimum of 50 mm.
- The twisted wires and the size of the cable make the T2Black-12 particularly suitable for most anti-fracture membranes available on the market.
The application
- Extra low energy consumption when used together with the Raychem smart and Eco-Design compatible thermostats.
- No measurable electro-magnetic fields due to the dual twisted wires of the heating cable.
- Long life and maintenance-free.
Technical Data
- Nominal power: 12 W/m
- Voltage: 230 Vac
- Max. exposure temperature: +90°C
- Min. installation temperature: +5°C
- Length of cold lead cable: 2.6 m
- Dimensions approx: 4 mm diameter
- Min. cable spacing: 50 mm
- Min. bending radius: 30 mm
- RCD: 30 mA
- Construction: PVC-outer jacket - Fluoropolymer resistance wires
- Certificates: CE, UKCA
Related Raychem Products
- NRG-DM: 1244-015152 - Intuitive electronic and Eco-Design compliant thermostat with Week Timer / Predictive Heating.
- GREEN LEAF: 1244-013810 - Attractive electronic and Eco-Design compliant thermostat with Week Timer / Open Window.
- SENZ WIFI: 1244-017778 - WIFI enabled touchscreen and Eco-Design compliant thermostat combining App enabled remote control, aesthetic design, and ease of use for maximum comfort from your underfloor heating. Features Week Timer / Predictive Heating / Open Window / Distance Control.
- T2BBlack Cable Guides (12pc): 1244-022788 - 12 pcs. of Raychem Cable Guides to attach the T2Black cable on the subfloor (using screws, nails, staples or hotmelt glue).
- Gluestick (10pc): 6012-8949540 - 10 pcs. of hot melt glue sticks in 1 bag.
- Gluestick (70pc): 503052-000 - 70 pcs. of hot melt glue sticks in 1 box.
- Sensor tube kit: 6012-8949541 - 2.5m flexible plastic conduit for installation of the floor sensor.
- T2Black repair kit: 1244-008869 - Repair kit for T2Black.
- Metal mesh 10 m: 476660-000 - Galvanized metal mesh of 10 m.
- Metal mesh 25 m: 726604-000 - Galvanized metal mesh of 25 m.
Design Table
T2Black-12 heating cables are available in lengths from 14.5 m to 175 m in complete packs including all needed accessories to install the cable and spooled on an inventive and easy to unroll spooling system. Packs including the NRG-DM thermostat and packs without thermostat are available.
| Product name | Without thermostat | With NRG-DM thermostat | Output (W) | Length (m) | Resistance Range (Ω) | Area m² (80 W/m²) | Area m² (100 W/m²) | Area m² (125 W/m²) | Area m² (150 W/m²) |
|---|---|---|---|---|---|---|---|---|---|
| T2Black 12-14,5M | SZ18300317 | SZ18300309 | 180 | 14,5 | 282,3-326,9 | 2,2 | 1,8 | 1,4 | 1,2 |
| T2Black 12-20,0M | SZ18300318 | SZ18300310 | 250 | 20 | 201,0-232,8 | 3,1 | 2,5 | 2,0 | 1,7 |
| T2Black 12-26,5M | SZ18300319 | SZ18300311 | 325 | 26,5 | 154,6-179,0 | 4,1 | 3,3 | 2,6 | 2,2 |
| T2Black 12-35,5M | SZ18300320 | SZ18300312 | 435 | 35,5 | 116,1-134,4 | 5,4 | 4,3 | 3,5 | 2,9 |
| T2Black 12-46,0M | SZ18300321 | SZ18300313 | 565 | 46 | 88,8-102,8 | 7,1 | 5,7 | 4,5 | 3,8 |
| T2Black 12-55,0M | SZ18300322 | SZ18300314 | 665 | 55 | 75,6-87,5 | 8,3 | 6,7 | 5,3 | 4,4 |
| T2Black 12-73,0M | SZ18300323 | SZ18300315 | 895 | 73 | 56,2-65,1 | 11,2 | 8,9 | 7,2 | 6,0 |
| T2Black 12-98,0M | SZ18300324 | SZ18300316 | 1210 | 98 | 41,5-48,1 | 15,1 | 12,1 | 9,7 | 8,1 |
| T2Black 12-125,0M | SZ18300492 | SZ18300489 | 1500 | 125 | 33,4-38,6 | 18,8 | 15 | 12 | 10 |
| T2Black 12-150,0M | SZ18300493 | SZ18300490 | 1800 | 150 | 28,2-32,7 | 22,5 | 18 | 14,4 | 12 |
| T2Black 12-175,0M | SZ18300494 | SZ18300491 | 2200 | 175 | 22,9-26,6 | 27,5 | 22 | 17,6 | 14,7 |
Calculated heating cable spacing: 150 mm (80 W/m²), 120 mm (100 W/m²), 100 mm (125 W/m²), 80 mm (150 W/m²)
Subfloor Preparation
The subfloor should be clean, stable, and rigid, without cracks or adhesion-reducing substances. Large cracks in the subfloor should be filled prior to installation. Uneven surfaces will need to be levelled prior to installation. With cement plaster and anhydrite plaster, ensure the substance has dried sufficiently according to applicable norms. Anhydrite plaster should be smoothened and dust-free. With quickly solidifying plaster, follow the supplier's instructions. The heating cable should not be installed under bath tubs, shower cabins, surface covering furniture, etc., or where holes will be drilled in the floor.
Installation Instructions
The T2Black-12 cold lead is inserted in a flexible tubing and connected to a junction box. T2Black-12 shall always be controlled by an electric underfloor heating thermostat with an external floor sensor, compliant with the EcoDesign directive (such as NRG-DM, GREEN LEAF, or SENZ-WIFI). The thermostat sensor, also protected in a separate flexible tubing (3 m included in T2Black pack), is positioned centrally between two heating cable runs and as close as possible to the final floor covering.
Figure 1 Description: Raychem Cable Guides snap together, designed to attach the T2Black cable to the subfloor. They can be cut to length to adapt to room size.
T2Black-12 can be used under tiles and natural stone. The cable can even be embedded directly in the tile glue, provided it is embedded in at least 6 mm of tile glue.
Fixing the cable to the subfloor can be done using Raychem Cable Guides, hotmelt glue, or installed directly in anti-fracture membranes and/or embedded in levelling compound or screed.
Cable Guides can be attached to the subfloor using screws, nails, staples, or hotmelt glue. When using screws, nails, or staples, use 3 to 4 per entire cable guide.
Figure 2 & 3 Description: Ensure individual cable runs maintain moderate tension to prevent the cable from floating during floor covering preparation.
Figure 4 Description: Install "Stabilizing Cable Guides" every 50 cm to ensure the heating cables do not float during the self-levelling process. To make installation easier, flip the cable guide upside down to smoothly pass underneath the cable runs, then flip the guides over to secure them to the subfloor and snap the cables into place.
Alternatively, the cable can be attached to metal mesh used as reinforcement for the levelling compound or screed.
T2Black-12 can be installed under parquet floors, engineered wooden floors, or laminate floors. It then needs to be embedded in a minimum of 15 mm of filler material, controlled by a thermostat with an external floor sensor set to a maximum of 27°C. The cable spacing should not be closer than 120 mm per cable run (resulting in a power output of 100 W/m²).
Typical Installation Heights
| Height* | T2Black-12 |
|---|---|
| 1-15 mm | 😀😀😀😀 |
| 15-30 mm | 😀😀😀😀 |
| 30-50 mm | 😀😀😀😀 |
* floor covering not included.
Floor Construction Schematics
Schematic 1 Description: Diagram showing a floor construction with layers: 1. Top Flooring (Tiles/plastic matting/wood or laminate), 2. Tile adhesive (when applicable), 3. Watertight barrier (when applicable), 4. Fine/coarse casting of concrete 10-15 mm, 5. Heating cable, 6. Adhesive primer, 7. Hotmelt glue, cable guides, metal mesh or antifracture membrane (installed per manufacturer instructions), 8. Stable load-bearing subfloor, 9. Thermal insulation.
Schematic 2 Description: Diagram showing a floor construction with layers: 1. Top Flooring (Tiles/plastic matting/wood or laminate), 2. Tile adhesive (when applicable), 3. Watertight barrier (when applicable), 4. Fine/coarse casting of concrete 10-15 mm, 5. Heating cable, 6. Adhesive primer, 7. Hotmelt glue, cable guides, metal mesh or antifracture membrane (installed per manufacturer instructions), 8. Stable load-bearing subfloor, 9. Thermal insulation.
