This XLPE insulated 3x50+1x25mm² copper cable is a robust and reliable solution for power distribution, specifically designed with three phase conductors and an additional earth conductor to meet various application requirements. Often referred to as 3 cores + 1 earth cable or IEC 60502 3 core and earth cable, it operates at a voltage of 0.6/1000V. Its construction ensures safety and performance, making it ideal for installations where an earth wire is mandated by customer specifications. A key application for this cable is in two-way lighting systems, where the extra conductor facilitates communication between two switches controlling the same light fitting.
Application
The structure of the 3 cores + 1 earth cable is specifically designed for applications where earth wires are required by customer specifications. This cable is frequently referred to as a 3 cores + 1 cable XLPE insulated with a voltage of 0.6/1000V or IEC 60502 3 core and earth cable.
The 3 core plus earth cable features three conductors, each coded with a different color, in addition to the earth conductor. One of the primary applications for this three core and earth lighting cable is in situations requiring two-way lighting, as it provides the necessary additional conductor between two switches that operate the same light fitting.
Standard
This XLPE 3x50+1x25mm² copper cable adheres to the following standards:
- IEC 60228 Conductors
- IEC 60502-1 Power cables with extruded insulation and their accessories for rated voltages from 1kV () up to 35kV () - Part 1: Cables for rated voltages of 1 kV () and 3 kV ()
Construction
The XLPE 3x50+1x25mm² cable is constructed with the following components:
- Conductor: Plain annealed copper, Class 2: stranded conductor
- Insulation: Cross-linked polyethylene (XLPE)
- Filler: Non-hygroscopic material
- Binder tape: Non-hygroscopic material
- Outer sheath: Polyvinyl chloride (PVC)
XLPE 3+1 Cores Cable Construction
Parameter
The parameters for the XLPE 3x50+1x25mm² Copper Cable are as follows:
- Cable Type: CU/XLPE/PVC
- Operating voltage, (V): 600/1000
- Number of cores: 3+1
- Phase Conductor Nominal Area (mm²): 50
- Earth Conductor Nominal Area (mm²): 25
- Phase Conductor Stranding: 10
- Earth Conductor Stranding: 7
- Phase Conductor Insulation Thickness (mm): 1.0
- Earth Conductor Insulation Thickness (mm): 0.9
- Sheath Thickness (mm): 1.8
- Cable Overall Diameter (O.D.) (mm): 28.2
- Cable Weight Per 1000 Meters (kg): 1830
- Phase Conductor Resistance DC 20°C Per 1000 Meters (Ω): 0.387
- Earth Conductor Resistance DC 20°C Per 1000 Meters (Ω): 0.727
- Allowable Ampacity in Air (Amps): 170
- Allowable Ampacity in Ground (Amps): 205
- Test Voltage: 3.5kV for 5 minutes
- Operating temperature (°C): -15 to +90
- Final short circuit temperature (°C): 250