As measured by .... touching the case and feeling a shock? Measuring with a high impedance voltmeter to ground?Still electrifies door, rails, and seemingly GDO.
As measured by .... touching the case and feeling a shock? Measuring with a high impedance voltmeter to ground?Still electrifies door, rails, and seemingly GDO.
As measured by .... touching the case and feeling a shock? Measuring with a high impedance voltmeter to ground?
A no-contact tester can be too sensitive.A no contact tester that beeps.
The shock was before I installed a gfci. But I am surprised the door and rails are electrified without tripping it.A gfci will trip if the mismatch of in versus out current is >5ma. If you can get shocked and it’s gfci protected, something is really wrong and needs to be fixed before someone is severely hurt.
if the 3-way switch is miswired, things might look okay with it in one position and not when it is in the other.
A no-contact tester can be too sensitive.
You might try shunting your meter leads with a resistor of maybe 100,000 ohms. Measure the voltage from a ground to your suspect conductors. You can the repeat the test.
Alternatively, read the AC current to ground. 5 mA is the lowest that could really hurt you when touched with your hand. There is a fuse in your meter probably. It may have been previously blown because somebody touched across a voltage source while the meter was in current range.
One question-- did you cut the ground off of the door opener plug or did you use a 2-prong adapter? Reversing the plug may change the symptoms. Consider that a workaround rather than a fix.
Is the hot-neutral reversed in that extension cord?And can't figure out why the long extension cord makes the difference between an electrified door and rails- there's nothing special about the cord.
Is the hot-neutral reversed in that extension cord?
The difference is that the door does not go up and down when powered by the long extension, regardless of which outlet powers that extension cord. Beyond that, is there any difference in symptoms?The 100 ft cord must lower the voltage enough to where the short in the GDO is unaffected.
This is awkward, but...
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