Prysmian 6242Y Grey 2.5mm² Twin & Earth Cable 10m Coil (82572)

Thank you for contacting Prysmian Group UK Technical Support. We recommend that you consult a qualified electrician. Teh current rating of the cable is very dependent upon the installation method, understanding and knowledge of BS7671 is a requirement when designing and installing cables. Thank you Kind regards Technical Support

Thank you for contacting Prysmian Group UK Technical Support. It is the responsibility of the system designer to select the most appropriate cable for the installation, application and environment intended. We are not system designers and cannot offer assistance in this area. We recommend that you consult a qualified electrician and or consult BS7671 for guidance. Thank you Kind regards Technical Support

You need SWA cable you can’t run 2.5 t&e in conduit

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As a broad guide, divide Max wattage (4200 watts ) by average incoming voltage (230v) gives amperage (Allow 20% over for safety gives 22 amp. The theory is if load on cable lasts over an hour, you can overheat a cable that is bang on max amps. Look for a cable that can carry at least 22amps. You will probably find there is quite a difference in cable carrying capacity. I think this will carry 20 max . Next size up jumps to 25 amp and price follows. Spend the extra. Screwfix do not show loads. Go to another big, really big DIY site. Look up cables and find the safe size. Go back to Screwfix. Better service and cheaper prices !