Re: Voltage Drop?
The pump motor has what's known as a "high-inrush starting current." This is pretty normal for motors, and it can cause a momentary voltage drop on other circuits. You'll notice this if you have incandescent lights, they will momentarily dim when the pump starts.
I'm assuming you have a single electrical panel. Is it circuit breakers or fuses? Do you know what the main amperage rating is?
Usually, the only way to resolve this is to upgrade the service entrance cables coming from the utility transformer, and possibly even having the utility upgrade the transformer. I've seen older houses where the service has been upgraded to 200A, but the "drop" (the wires from the utility transformer) haven't been upgraded by the utility. The existing wires are not large enough to meet modern demands, resulting in voltage drop like you're seeing.
You might be able to get the utility to send someone out to evaluate your service.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.