For a low resistance aluminum joint, the aluminum bar conductors must be plated to minimize oxidation. Lesser the current lesser the electrical problems, this is a sure resultant situation, consequence. the length of line is 3000 feet. Electronic devices can generate a lot of heat. Heather Hardy,Royal Grammar School Guildford, "I want to thank your customer care team for their exceptional service and support. For technical reasons, so-called ‘finely stranded’ and ‘extra finely stranded’ conductors are only available in copper. please help me to share this not just for financial gain but helping my fathers dream to be recognize for his work. Conductor (Copper/Aluminum/silver) is the metal in which electricity flows, Insulator is the protection cover of conductor and sheath (inner/outer) is also a thick layer of insulating material (rubber for say). A table with thermal conductivities (at 25 °C) of used metals is stated below: In fact, aluminum only has 60% of the thermal conductivity that copper does. Packaging was superb. Is Gold also act as a conductor? 1.5Sqmm Copper Cable is enough for 5A load. please email me for your feedback. All online orders in the UK are Free delivery no matter the size. However, the total weight of the marginally larger transformer with aluminium windings will be slightly lower. Very good comparison and most widely required and utilized by design engineers…….. which one is the best option for long duration and stability. The content is copyrighted to EEP and may not be reproduced on other websites. Differences in manu facturing costs pretty much cancel each other out and in the opinion of a number of well-respected manufacturing companies, the choice of conductor material is primarily a question of company philosophy. Aluminum vs. Copper: Heat Conductivity. Do you really need 2.5 sq mm copper cable for this ?? The only really novel development in recent years has been the introduction of cast copper rotor cages. so we decided to put a underground cable with the pipe line.which is the best cable we used for this purpose. One more point for aluminum. One new area of application is copper rotor cages: In this application, the crucial factor is the greater electrical conductivity per unit volume of copper. You may also realize that copper has better heat conductivity. Also do check the insulation for temperature resistance. And not a lot has changed or is likely to change in that respect. Concern over the Al oxidation away from the joint is not an issue and will act to protect the conductor from further corrosion in most environments. The protective earth conductor is configured in this case as a surrounding copper-wire shield, which offers far higher symmetry and EMC than a conventional i fifth conductor. I have never experienced such detailed and prompt attention to an urgent need today. Why we use copper conductor in 3.5 sq.mm cable instead of Al. Dear Edvard, I’m trying to figure what mm2 size aluminum is a good alternative for 2.5mm2 copper. It is also possible to get very small stranded copper cable; stranded aluminium cable is only available at nominal cross-sectional areas of at least 10 mm2 and the individual strands are still very thick compared to those in the equivalently sized copper cable.