The room being used for an office has two computers, two monitors, flatbed scanner, inkjet printer, router, cable modem, external drive, two powered subwoofers, and a small desk lamp. The computers each have their own UPS (APC Back-UPS ES 650 and 500). Within the past few days, the UPSes have started clicking several times a day. These UPSes beep several times when switching over to battery power, and they haven't done that more than once or twice, but the clicking would seem to indicate a voltage drop significant enough to cause them to start to switch over. This only lasts about a second or less, and I've observed the lights in the room flickering just a bit at the same time. I've also observed lights flickering slightly in other rooms, so it's not limited to just the office.
So, I decided I'd better get someone out here to look at the panel. I have a main panel (125A) and a subpanel (75A), and they are both of the notorious FPE Stab-Lok kind, the evils of which I just learned about after doing a bit of Googling. The guy that I hired examined both panels and tightened down all the connections, and said everything looked OK as far as he could tell, but recommended that when I'm ready to upgrade I should install a newer panel with more capacity (the breaker on the subpanel that covers the office also covers two halogen wall-mounted lights in the hallway, the master bedroom, the guest bedroom, and the living room. The guest bedroom and the living room are very infrequently used.). He also reanchored the utility drop where it splits into three main cables just upstream of the meter (hope I'm using the correct terminology here), as the cables had come loose from the "anchor" mounted on the house and were "pulling" on the connectors.
I thought this must've fixed the problem, as it was not reproducible while he was here, but a couple hours after he left, the UPSes started clicking again. I'm concerned that this will ultimately cause damage to the computers or the UPSes, and am wondering whether I need to get a second opinion from another electrician, or whether I should call the utility and ask them to put a line monitor just upstream of the meter to see if it's an issue with their equipment. I'm concerned about the panels after reading about FPE's failure rates, but unless I get a professional opinion that they're unsafe and should be replaced immediately, I'd prefer to defer doing so until a couple of other expensive improvement projects are completed.
Comments or recommendations?
Thanks in advance,