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  1. T

    17th edition exam question not find answer?

    just wondered if anyone can find this one as i couldn`t A single phase ac installation from a lighting db contains a common conduit with 8 single core cables the grouping factor to be applied is a 0.59 b 0.65 c 0.75 d 0.8 may be i was rushing but could not find one of these in...
  2. W

    Installation testers?

    Hi, two questions really. i think the answer to the 1st one is no but ill ask anyway. 1. Is it possible to get a installation tester that you can use to PAT test. i know most installation testers use 100mA earth test current. thats would only be suitable for IT appliances, right? 2. has...
  3. V

    Can anyone answer these questions PLEASE

    1) Step-up and Step-down transformers are used to change voltage and? a) current b) resistance c) power d) all of the above 2) Long-distance transmission of electricity requires? a) high current, low voltage, and low resistance b) low current, high voltage, and...

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