elf-Regulating Heating Cable Snow Melting & De-Icing
FINE SM2-CR is specifically designed for direct burial in concrete to melt out snow piled up on street.
Unlike ordinary metal resistance wire which produces heat output corresponding to its length, the core of SM2-CR is composed of the infinite parallel connection of carbon particles. The parallel circuitry allows the cable to be cut to the exact length required, with no wasted cable.
SM2-CR consists of a continuous core of conductive polymer extruded between two copper bus wires.
SM2-CR regulates its own heat output in response to ambient temperatures as electrical current flows through the core. The self-regulating function of the core is due to its PTC (Positive Temperature Coefficient) property by which the electrical consumption of SM2-CR is reduced in the application.
Product construction
Product construction
1. Copper bus wire
2. Self-regulating conductive core
3. Inner adhesive jacket.
4. Modified polyolefin jacket
5. Tinned-copper braid
6. Modified polyolefin outer jacket (-CR)
Product characteristics and design information
| information | ||
|---|---|---|
| Copper bus wire | 14 AWG | |
| Max. power output | 80 W/M | at 0℃ in concrete |
| Cable spacing | 25 cm | 4M/square meter |
| Max. maintenance temperature | 90℃ | |
| Min. installation temperature | -10℃ | |
| Service voltage | 200 – 254 VAC | |
Max. length (m) vs. Circuit breaker size
| start-up temperature | 20A | 30A | 40A | 50A | |
|---|---|---|---|---|---|
| SM2-CR 220V | 10℃ | 23 | 35 | 50 | 65 |
| 0℃ | 20 | 33 | 45 | 55 | |
| -10℃ | 17 | 31 | 40 | 50 |