explosive atmosphere

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  1. S

    Hazardous areas - control voltage transformer earthing -

    I've been in an ongoing debate regarding earthing of a control transformer and i'd like some other opinions. 690 primary, 120v secondary supplying control circuits (contactors/DC convertors etc), the neutral is tied to earth - My issue is the location that it is tied to Earth. As far as I know...
  2. J

    luminaries in explosive atmosphere

    When doing a IR test on a 230v circuit containg several explosive (Ex) proof luminaries:- 1)Voltage to be applied 2)Reason why the switch controlling the luminaries is left in the off position
  3. J

    IR test on luminaires in a explosive atmosphere

    As part of a Peridic Inspection test, on a 230v circuit having luninaires in a Explosive Atmophere area - the reason why the switch controlling the luninaires has been left in the off position?

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