Possible causes are anything that chops up the sign wave to convert the incoming voltage to something else that it needs to run the equipment. i.e. computers, fluorescent lighting with electronic ballasts, TVs, things like that. There are filters that can be placed on the main panel that will filter out transients that are coming in on the service.If it is coming in on the neutral, what are the possible causes and fixes?
It's not so much the distribution and more the loads. 3 phase is more susceptible to harmonics because they are 3phases at a 120 degree between hot conductors. It's exacerbated by the sharing of neutrals which is common in three phase system supplying 120v loads. Such as in an office building when supplying power to a floor full of cubicles. (cube farm)Does the way they distribute the three phases contribute to the issue?
In his case he does not have 3 phase and hopefully not sharing neutrals. I also believe the lines supplying the transformer supplying his house is also single phase. But he does have electronic loads which will muck up his electricity.
IF it is coming in on the service turning off the main breaker, can if ALL other power sources in the house are off or disconnected from the system i.e. solar panel, power backups, anything that will power up when the incoming power is lost. Can tell you it's riding on the incoming neutral. That's why I ask if it is lifted not during a power outage as state because the source of the transients could also have lost power.
And he could have a neutral in the house somewhere pressing against a grounded metal of a box or an EGC and leaking a bit to the EGC. That's why I asked if the main breaker from the service to the house is what was referenced in my last message. As that would eliminate the stray voltage he is seeing at the pool.
He stated that his panels are back to back. I wish I could see the setup as some people say back to back but there is a wall between them as in the meter is outside and the panel inside the house. if that is the case and the nipple between them is plastic and there are no screws shared by the meter and panel then turning off the main in the house and lifting the neutral in the panel would work and would not have to involve the power company. AGAIN safety first if someone is not comfortable ina panel they should call someone who is licensed and is. Always turn off power before lifting wires, as if there are shared neutrals you can and will burn up equipment.