What is the Electrical Cable?
- Electrical Cable will be made of one or multicore insulated core and sheath.Also we can add the protection layer over the insulated core. Electrical Cable’s Size is much more big,Construction is much more complex,this is the main different from normal wire.
- Electrical Cable Insulated Core: Made of Aluminium(AL) Or Copper(CU). The Insulated core can be made of one conductor or stranded by more conductor.
- Electrical Cable Insulation layer: Cable’s insulation must have the higher insulation resistance,higher electric field strength,low dielectric loss and low dielectric constant.The Common Material Of Insulation-PVC(Polyvinyl Chloride),PE(Polyehylene),XLPE(Cross Linked Polyethylene),RUBBER,etc.
- Electrical Cable Sheath: PVC,PE,Rubber,Lead,etc. Function is protect the insulated core from mechanical damage/wet/chemicals/light and other kinds of damage.
- Electrical Cable Protection Layer: Common Material-Galvanized Steel Tape,Steel Wire,Copper Tape,Copper Wire will be used at Armoured Layer wrapping at the inner sheath.Also the Armoured Layer have the function of electric-field screening and electromagentic wave interference.
- Electrical Cable Outer Sheath: Common Material-PVC,PE,Rubber,LSZH. For protect the protection layer(like Steel Tape,Steel Wire,etc.) from corrosion and damage,we will use the extruded PE,PVC,Rubber be the outer sheath.
- Compare with the overhead cable, Underground Power Cable’s advantage is small insulation distance between insulated core,small occupation space(do not occupy the air space), will not be polluted by ambient environment,Reliable power transmission,safe to people and environment.
- Disadvantage of underground power cable: cost is high,the cable installation and the check will be troublesome.