Acceptable Voltage Drop on Neutral Service Conductor
I’ve been dealing with load fluctuations when other loads turn on/off, and not just large motors start ups. I even have an electric kettle (Fellow Stagg) that will cause lights to flicker when it goes into temp control mode, and not just lights on that branch circuit.
I took some measurements and my conclusion is that my service conductor neutral has unreasonably high resistance.
This is a U.S. residential 120/240 spit-phase 200amp service with aerial service drop.
So my questions are:
1) What is an allowable (or acceptable) voltage drop across the neutral service conductor (from the transformer to the service entrance breaker panel). My service drop is indeed very long as I’m in the sticks. At what amperage should the service drop be calculated? It’s a 200amp service.
2) Can you check my calculations to make sure I’m not messing something up. I will post those below as a comment.
3) My plan is to call the utility. Should they be amendable to coming out to look at this? Anything that I should prepare to convince them? I’m trying to avoid dropping a bunch of useless cash on an electrician to come out and tell me I need to call the utility.
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