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Hi I have two question I can't get my head around the first, Calculator the resistivity of an aluminium conductor 150m in length, csa is 4mm2 and has a resistance of 1.06 ohms. I rewrote the resistivity formular to give me p= AR/l which gives me an answer of (4x 10-3 x 1.06) / 150 0.00002826...

Hi I am 19 and in my first year of my apprenticeship and getting on really well and really enjoying it. I am very good with hands on work and take in information very earlier, unfortunately due for unforeseen events my current company won't be able to keep me on. There for I am looking to...

Hi I am fairly new to the trade and am only a few month into my apprenticeship. When I started college I start to read bs7671:2008 and I have a general knowledge anyway however some of the regs I am not sure I am interpretating the right way. Reg 701.413 protective measure: electrical...