Recent content by m_sadeghinia

  1. M

    Instrument Earth Bonding

    Hi, As stated in Article 250 of NFPA 70, different types of earthing (intrinsically safe, instrument earth(non IS) and protective earth) shall be connected together (apparently) at one point. But I didn't find any solution to avoid one earth current or voltage, affecting other earthing system in...
  2. M

    Surge Protection Device vs. Grounding in Transmitters

    Hi, I'm a bit confuse about differences between surge protection device and grounding in electronic transmitters. As a general rule, housing of all instruments shall be grounded. Also as requested by our Client, all transmitters (and F&G detectors) shall be equipped with SPD (either internal or...
  3. M

    Surge Protection Device vs. Grounding in Transmitters

    Hi, I'm a bit confuse about differences between surge protection device and grounding in electronic transmitters. As a general rule, housing of all instruments shall be grounded. Also as requested by our Client, all transmitters (and F&G detectors) shall be equipped with SPD (either internal or...
Top