Had an instance before when I had a voltage while running on a treadmill. I flipped all the breakers and it seem to work again for a month and now it is back and now when we use a high load appliance like the microwave the voltage drops.
I tested all the breakers by adding a load and it seems it’s on one leg. And I tested the lugs and the voltage did drop with a load. Unfortunately the tested I am using isn’t digital and doesn’t display the actual voltage but the 120 light is completely off under load and only the 24v is light. The 120v light comes back on when the appliance turns off.
Is there a problem in the house on one of the circuits? Or does the drop on the lug indicate a problem before the breaker panel?
Thanks in advance for any advice.
Edit: I picked up a digital multimeter and now under normal loads the one leg reads 125-126 and other 115ish. With the microwave on it goes becomes more unbalanced 130v one lug to 110v on the other
Edit2: with the washer a full when agitates(using the motor) voltage dropped to 97v on one leg and the 140v ish on the other. Again coming in from the service line to the main breaker. That seems to be getting too much so I called in with the PoCo reporting a partial outage.