class

  1. U

    class 2 and class 3

    I am new thats electrical business , what is a class 2 product [ two wires and no earth ?] and is class 3 with three wires [ 3 core] with an earth. Why do some items not require earth What is the meaning of double insulation in laymans tearms [ does it mean two protective layers of...
  2. P

    lighting chain testing

    i was watching the electrical engineers testing some mains light chains they bought from Argos [ fairy lights in bamboo shoots - ornamental thing it was]. They were hi pot testing, they were arguing over the test voltage. Ian said 500 vac and john said no its 3570 vac. They were arguing about...
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