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A very simple/numbty question, but just to put my mind at ease. When using a combi test or multimeter, I presume it is ok to test between live and neutral, l & E, E & N or different live to live on 3 phase. Its not going to blow up/affect the circuit i'm testing is it?.

Hi, I'm installing a supply to my shed, and I havent done SWA glands before and am struggling like hell. My boss is going to come and check/test what i've done, but only when i'm done. He's told me basically what to do, but fitting the cw 20s gland for 3c 2.5 swa is a nightmare. I can get up...

At college, I've been set a few different questions, which i need to explain how I would install different things. One question I'm unsure of: Add a sounder to an existing system can you simply extend the existing system by going into a sounder and spuring off the sounder. Or do you...