automatic disconnection of supply

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  1. D

    0.4 seconds or 5 seconds

    Just a quick question. This might sound like a stupid question so apologises. I'm slightly confused with the regs 18th edition when it comes to disconnection times. So I was taught in college that in the 17th edition that when a circuit is less than 32A then the maximum permitted time is 0.4...
    • David345
    • Thread
    • 18th automatic disconnection of supply disconnection disconnection times regs seconds times tripping times
    • Replies: 21
    • Forum: UK Electrical Forum
  2. R

    Automatic disconnection of supply

    Can the above method alone be classed as basic protection according to 131.2.1 it can. Based on that regulation you can leave live terminals exposed if supplied by a 30mA RCD

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