Tingle tingle ZAP!

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unibob

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Is your hand in the water when you bump your shoulder? Light could be leaking and you touching it while having hand in water could be making it take you as a path.
 

Darryl_V

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Woodstock, Ontario
salt creep and what not do a number on light fixtures.  Also ballast can leak electricity even when new.  Is the ballast grounded?  Is the fixture grounded?
 

Blob-79

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my guess is the tank has some current leak, and when you touch your shoulder it completes the circuit. A light fixture frame is much better ground then just the floor. this is dependant if your wearing socks
 

Poseidon

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SW Ontario
the ballast is three pronged right into the wall and yea it only tingles when i touch the water AND the light at the same time
 

Darryl_V

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Brandon link said:
the ballast is three pronged right into the wall and yea it only tingles when i touch the water AND the light at the same time

I didnt realize you had your hand in the tank.....the fixture is just a better ground path.
 

Reef Hero

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Lucan
Brandon link said:
i actually have something similar..
when i stick my arm in the tank theres no tingle... but when i touch my shoulder to my light i get a strong tingle....
what does that mean? i figure since u guys all sound like you know what your talking about i may as well ask :)

In your case it could actually be leakage from either but I would strongly lean more towards the light case just being a much more solid path to ground than just thru yourself and whatever flooring your have. If you have a good multimeter you can easily test the case of your light to ground or even neutral to check for a potential difference (voltage). Then you could also check your water to ground..... I would suggest you use the ground terminal right at a receptacle as your ground point. Please be careful to anyone doing this.....know what you are doing!!
Oh, and don't forget to check for both ac and dc voltage.
 

unibob

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The source was the lights in my cube hood. Took all apart, cleaned them as there was a bit of salt creep.
 
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