Can anyone help me with this problem? The light bulb burned out in my swimming pool and I discovered this problem when trying to replace that bulb. I read up on how to replace the bulb. That's pretty easy. It's just like a household lamp socket (same size shape - a normal light bulb will fit). The entire light is inside a water tight "can" with a long cord exiting from the "can". The cord goes through the concrete to a GFCI. I tested the GFCI with the test button, and it works fine. However, when I tried to re-install the fixture, I placed it in the pool and pushed it under the water to be sure not air bubbles rose (this would indicate a leak in the seal). This went fine. I turned on the light and it worked fine. I turned off the light and got in the pool to mount it back in the niche in the side of the pool. That's when I noticed a VERY slight shock. Even with the light switched off, I could feel a slight electrical shock. I first noticed it around my lips (I suppose I have sensitive lips!) and then I noticed it a little in my hand even when holding the fixture above the water (I was swimming in the pool.) I believe I could have gone ahead and put the light in the pool wall and all would have been fine.....however I got scared and I thought I would see what I could learn.
I did some testing and here is what I found. Using a Cen-tech P35017 multimeter, I touched one lead to the center of the light socket, then the other lead to the water. And then repeated the same test touching the outside of the light socket, and the water. etc.... If you cut and past the text below in an editor and set the font to Courier, everything will line up properly.
Reading Reading
1st lead 2nd lead Power ON Power OffCenter Water 122.50 1.24 - 1.26 Outside Water 1.3 1.10 - 1.30 Housing Water 1.50 1.12 - 1.15
Center Concrete 30.0 - 60.0 .44 - .50 Outside Concrete .4 - .5 .40 - 1.20 Housing Concrete .5 .62 - .64
Center Air 17.6 - 17.9 .38 - .42 Outside Air .20 - .37 .36 - .38 Housing Air .30 .32 .38 - .42
Air Air .006 - .011 .006- .001
Center = Center part of lamp socket Water = I touched the water in the pool with the probe Outside = Outside of lamp socket Housing = the outside, stainless steel part of the lamp (this is the part that touches the water) Concrete = I simply touched the concrete ground around the swimming pool
All numbers are in volts.
I figure that if I gave lots of information, maybe someone could help me out. Please let me know if this is normal or if I should contact a professional. Thanks for your help.
Chris