I have a 120v load im trying to troubleshoot, i replaced the GFCI located in garage as it's the first termination after the breaker and i thought it was the issue.
Before and after GFCI the issue was losing power to the garage door, and outdoor waterproof outlets (4 outside). I began by testing voltage on the outlets, and found the garage door outlet has 88v between hot and neutral, but 120v between hot and ground. I believe there is one WP outlet on the load before the low voltage outlet, and it is testing good 120v.
The other outlets after the garage door with the 88v have less than a volt on the live vs neutral but good 120v between live and ground.
The thing i am really puzzled by is the outlets worked for about a week after the new GFCI, i plugged a string trimmer in and it didnt work so i was back to troubleshooting.
Two days later, i was going to pull the meter out and test voltage once more and a continuity test on the neutral line throughout, but voila the lights on the garage door lit up and started working.
A few hours later, door was still on so we decide to plug in a halloween inflatable to a waterproof outlet and see what happens... well what happened is it never blew up and the garage is back out and to 88v once again.
I have checked neutral continuity once before changing GFCI outlet and it was good. Since its happened again its making me lean back toward a break in the neutral; but why would it make again a few days later?! The house is only 2 years old and was built in 2015..
Since you read my long winded ordeal, whats your advice? Another GFCI? Maybe it IS neutral line.
Sorry I was a little tired last night after work.. some clarification.
The garage door outlet had 88v between live and neutral, and 120v between live and ground. I did not mean 120v between ground and neutral.
One WP (waterproof) outlet which i am GUESSING is before the garage door has tested good (120v between live/neutral and live/ground). The other waterproof outlets test less than 1v between live and neutral but 120v between live and ground.
I have had the outlets out, and i found no breaks in continuity between the neutral connections. Also don't see any issues as far as breaks in connections to the outlets.