Basic Electrical Installation Work

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The cable not insulated since placed out reach and insulation would only add to the weight the cable. The cable constructed stranded aluminium conductors formed around core steel stranded conductors (see Fig. spe- cial terminations are required, the cable may terminated through a grommet into knock out box terminated through simple compres- sion gland. The alumin- ium conductors carry the current and the steel core provides the tensile strength required suspend the cable between pylons. High-voltage power cables The cables used for high-voltage power distribution require termination and installation expertise beyond the normal experience contracting electrician. . 6. The sheath circular and made robust thermoplastic low smoke, zero halogen material.Basic electrical circuits and cables 127 air, unless adequately terminated. The cable fire resistant cable, primarily intended for use fire alarms and emergency lighting installations may embedded plaster.0mm. The cable available with either solid stranded conductors that are insulated with ‘insudite’ fire resistant insulation material.4). The cable easy use PVC insulated and sheathed cable. High-voltage overhead cables Suspended from cable towers pylons, overhead cables must light, flexible and strong.0 4. The conduct- ors are then screened, wrapping aluminium tape around the insu- lated conductors, that is, between the insulated conductors and the outer sheath. However, much simpler use and terminate than cable. The regulations covering high-voltage distribution are beyond the scope the IEE regulations for electrical installations. FP 200 available and cores with conductor size range from 1. FP 200 cable FP 200 cable similar appearance cable that circular tube, the shape pencil, and available with red white sheath. Operating at voltages excess 33kV and delivering thousands kilowatts, these cables are either suspended out reach pylons buried the ground in carefully constructed trenches. This aluminium tape screen applied metal side down and con- tact with the bare CPC. The core colours are: two core, red and black, three core, red, yellow and blue and four core, black, red, yellow and blue. The termination cable a complicated process requiring the electrician demonstrate high level of practical skill and expertise for the termination successful