I had that at one grain handling site and also your fingers would tingle when you touched any of the electrical boxes. It went away when they had the electrician fix the ground. So I’d be at least mildly worried regarding personal safety. Some rural electricians will interchange neutral and ground. If the 3rd prong is wired to the neutral, that’s probably enough to make the APC unhappy. When a building is 500 feet from the transformer and has big motors and grain driers and stuff, neutral is definitely not the same as ground. And god forbid the site has high-leg delta.
From: That One Guy Sent: Wednesday, January 07, 2015 3:52 PM To: [email protected] Subject: Re: [AFMUG] APC Site Wiring Fault Good luck with calling an electrician. APC is just tempermental, half of ours say site wiring fault. We gave up trying to figure it out when the electricians couldnt. On Wed, Jan 7, 2015 at 3:46 PM, Josh Luthman <[email protected]> wrote: If it was me I'd call the landlord and let them know your unit is detecting a problem on the AC side. Ask if they can take a look at it before there are any electrical problems. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Wed, Jan 7, 2015 at 4:44 PM, Nate Burke <[email protected]> wrote: Our temps are Below 0 now, and one of my APC UPS's at a site keeps sending an alert 'Site wiring fault' then clears a few minutes later. The APC Knowledge base lists off some various reasons, Overloaded Neutral, Disconnected Groud, but basically says call an electrician. Is this something I should be worried about, or just figure that there is a loose ground connection in the cold. This is at a grain facility which is new within the last year, so it's not like it's old electric. He installed our own breaker back at the panel, but we are sharing a neutral. Anyone else had to troubleshoot this before, or just don't worry about it. The UPS is still self testing just fine. Nate -- All parts should go together without forcing. You must remember that the parts you are reassembling were disassembled by you. Therefore, if you can't get them together again, there must be a reason. By all means, do not use a hammer. -- IBM maintenance manual, 1925
