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TR2031 loop detector feeder cable is a copper communications cable sheathed with medium density polyethyylene (MDPE) designed for installation in a ducted network. Armoured feeder cables are used to feed electrical current to inductive cable loops and designed for direct burial underground.
BS 6500
Conductor : Solid plain annealed copper, comply with IEC 60228 for Class 1
Insulation : Polythene (PE), comply with IEC 60708
Core Identification : 1 pair – red, black ; 2 pair – red, yellow, blue, black laid up in quad formation in order of rotation
Screen (for Non Armoured Cable Only) : Aluminum polymer laminate tape comply with IEC 60708
Inner Sheath (for Armoured Cable Only) : Medium density polyethylene (MDPE), comply with IEC 60708
Armor (for Armoured Cable Only) : Galvanized steel wires to BS EN 10257-1
Outer Sheath : Medium density polyethylene (MDPE), comply with IEC 60708.
Outer Sheath Color : Orange/Black
Rated voltage : 600/Kft volts
Minimum bending radius : 8 × Ø
Rated temperature : +70°C
Conductor resistance at 20°C : 1.5mm² ---- 12.1ohms/km ; 2.5mm² ---- 7.41ohms/km
Insulation resistance : >1500 MO × km
Loop inductance : 630μH/km(1P) ; 720μH/km(2P)
Capacitance :
| Unarmored | Armored | |||
|---|---|---|---|---|
| 1.5 mm² | 2.5 mm² | 1.5 mm² | 2.5 mm² | |
| <75 pF/m | (1P) | pF/m | 64 pF/m (1P) | |
| 52 pF/m (2P) | 53.5 pF/m (2P) | |||
Current rating :
| Unarmored in air (30°C) | Armored in ground (15°C, 1.2°C m/W) | ||
|---|---|---|---|
| 1.5 mm² | 2.5 mm² | 1.5 mm² | 2.5 mm² |
| 24* | 33* | 32* | 41* |
*These ratings are based on only two cores loaded simultaneously. In two pair cables where all four cores could be loaded simultaneously, the above values should be multiplied by 0.78.
| Number of Pairs | Nominal Conductor Area | Nominal Conductor Stranding | Insulation Thickness | Inner Sheath Thickness | Nominal diameter of armour wire | Outer Sheath Thickness | Nominal O/D | Approx Cable Weight |
|---|---|---|---|---|---|---|---|---|
| mm² | NO./mm | mm | mm | mm | mm | mm | Kg/km | |
| Unarmored cables | ||||||||
| 1 | 1.5 | 1/1.38 | 0.60 | - | - | 1.4 | 9.0 | 67 |
| 2 (Q) | 1.5 | 1/1.38 | 0.60 | - | - | 1.4 | 10.2 | 118 |
| 1 | 2.5 | 1/1.78 | 0.70 | - | - | 1.4 | 10.4 | 99 |
| 2 (Q) | 2.5 | 1/1.78 | 0.70 | - | - | 1.4 | 11.8 | 166 |
| Armored cables | ||||||||
| 1 | 1.5 | 1/1.38 | 0.60 | 0.7 | 0.9 | 1.4 | 11.9 | 265 |
| 2 (Q) | 1.5 | 1/1.38 | 0.60 | 0.7 | 0.9 | 1.4 | 13.2 | 335 |
| 1 | 2.5 | 1/1.78 | 0.70 | 0.7 | 0.9 | 1.4 | 12.7 | 336 |
| 2 (Q) | 2.5 | 1/1.78 | 0.70 | 0.7 | 0.9 | 1.4 | 14.1 | 375 |
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Caledonian Cables
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