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Is there a device certification requirement when using mains power (60hz / 120V) in/around water? I'd like to market a custom fish-tank with integrated lightbulb and pump. The lightbulb won't be submerged, but the product will place mains power and water in near proximity.

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  • \$\begingroup\$ Welcome to EE.SE. I would advise the use of PVC enclosures for all the circuits. Even with an isolation transformer you want to shield all power feeds. \$\endgroup\$ – Sparky256 Feb 9 '18 at 0:54
  • \$\begingroup\$ All mains powered new designs must be safety certified. I would imagine you need a safety GFCI breaker and a titanium ground rod. marinedepot.com/… Although you would be wise to use low voltage units \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Feb 9 '18 at 1:07
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You would want that kind of device to be galvanically isolated from the earth, preferably using isolated 1:1 transformer as an external power source. Isolated transformer is one that is not referenced to input ground.

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