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Plug-in tester?....The three small lights are limited...... NON-Contact tester?......sensitive enough to read adjacent power....... Sounds like a ground fault in the NEW Pool Light circuit..........."the breaker won't re-set"

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The neon tester senses the voltage BETWEEN two connections. Properly wired it should be "fully lit" when connected between Hot and Neutral and Hot and Ground…

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Invest in a cheap Multi-tester. Radio Shack has them for under $24.00 An accurate voltage reading can save you a "MULTI"-tude of headaches In addition, it has a continuity checker and an ohms feature that could come in handy sometime down the road

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…are unreliable for testing voltage or amperage. They mostly…
…use, but Home Depot sells tester plugs to test for adequate grounds, as well as voltage testers to tell you how…
…wires that made your neon tester glow more brightly are two…

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…Test for voltage. Use a voltage tester to test for voltage. Place one…
…the fixture for voltage with a voltage tester. Step 4: Remove the old fixture…
…With the wires exposed, use the voltage tester again to be sure that the circuit…

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