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I’m designing a light fixture for underwater lights and everything was going great until I checked for any current leakage. All I have is a multimeter but my meter is reading 90 vac when lights are powered.
The bulbs are being supplied with around 120 to 135v and the reading I get from the water is always less than what is being fed to the fixture.
Just for a test I put a section of a brand new heavy insulated extension cord into the same barrel that I test my lights in “not the plug end” and put a probe in the water and one probe to my a metal column on my building and got around 90v reading again.
Now I know for a fact water isnt getting through the seoow cord and all connections inside fixture are potted in epoxy and no water is getting passed the seal where the bulb screws In as it’s bone dry but somehow there is still volts being read in the water.
I’m leaning towards the readings being false. If I throw a wire In the water and then touch the wire to the building which is metal and grounded, none of the 3 gfci’s trip so would it be safe to say it is a phantom voltage?
Is it caused by inductance maybe?
I have 4 sets that I’m giving away so I can do real world testing to make sure they last before selling but this has halted that. I’m trying to make these as safe as possible.
Or what do I need to do to find out if these 90 volts are hazardous or safe?
The bulbs are being supplied with around 120 to 135v and the reading I get from the water is always less than what is being fed to the fixture.
Just for a test I put a section of a brand new heavy insulated extension cord into the same barrel that I test my lights in “not the plug end” and put a probe in the water and one probe to my a metal column on my building and got around 90v reading again.
Now I know for a fact water isnt getting through the seoow cord and all connections inside fixture are potted in epoxy and no water is getting passed the seal where the bulb screws In as it’s bone dry but somehow there is still volts being read in the water.
I’m leaning towards the readings being false. If I throw a wire In the water and then touch the wire to the building which is metal and grounded, none of the 3 gfci’s trip so would it be safe to say it is a phantom voltage?
Is it caused by inductance maybe?
I have 4 sets that I’m giving away so I can do real world testing to make sure they last before selling but this has halted that. I’m trying to make these as safe as possible.
Or what do I need to do to find out if these 90 volts are hazardous or safe?