Symptom: Lights dim when appliances or laserjet printer kick in while HVAC and clothes dryer running.
I currently have a 400 Amp service split into 2 panels each with a 200A main breaker. I'm all electric, no gas. House built in '96, one floor. Main feed comes in garage.
On one panel, I have 350A combined breakers (15A is not used, attic fan removed) and the other side 245A combined breakers (60A not used, was added for a jacuzzi that previous owners never put in).
I already had an electrician come to the house to loosen and tighten all the connections on the panel.
My thought is, I don't have proper distribution of power across the panels. However, I'm not an electrician, so I don't know for sure. But by looking at both panels, it seems the one side may be demanding a lot and not very well balanced.
I then noticed the office which has the laserjet printer is tied to the lighting in the living room and hallway. So I can see how the printer could be dimming those lights. However, the kitchen appliances are on a separate breaker which also cause the lights to dim.
I plan on running a dedicated line for the printer and office computer on the panel that consumes less power hoping this would fix it. However, I want to hear some other thoughts and possible solutions to this.