Get a meter and verify voltage line to neutral, line to ground, neutral to ground. If you have access to the panel check the 240 line to line, and verify that the two legs are ~120 to both ground and neutral. If all those check out you should be good. There are some other truly weird creations where the phasing between lines can be odd but those are very hard to create.
Mark Radabaugh Amplex 22690 Pemberville Rd Luckey, OH 43443 419-261-5996 > On Aug 23, 2020, at 12:45 PM, Chuck McCown <[email protected]> wrote: > > I had something similar happen. An electrician picked the wild leg of a > three phase to connect a new receptacle. We had about 208 volts on it. Of > course only discovered after the damage. I have seen neutrals get damaged > and connected to the other side of the box giving you 220. Did you check > your AC voltage? > > Sent from my iPhone > >> On Aug 22, 2020, at 9:35 PM, Steve Jones <[email protected]> wrote: >> >> >> Today was an adventure, to say the least. >> Without the prior info on the clusterrest clusterfuck of my career, we are >> installing some wtm4200. Glancing these meanwell power supplies may or may >> not be -48v. >> We have two radios onsite, first powers up swimmingly >> Second power supply connected only to AC decides to smoke bomb. Was plugged >> into a triple plug on a power strip. Was powered on for a bit then did its >> rocket ship thing. Figured ok, just a bum meanwell, the other one is up and >> powering a radio without issue. >> I'm plugging in a cambium ps into the triple plug as my contractor is >> plugging in a power strip into the second on a duplex outlet. >> The fucking powerstrip explodes, literally. >> It's a cheap surge suppressor power strip. So I'm assuming the SS is what >> blew up. >> I have no further data, since my contractor almost lost a hand. I'll >> investigate in morning daylight. >> >> Somewhere in this power mix I screwed up. >> >> With the limited data I have, anybody got any ideas before somebody gets >> killed? >> >> I have 2 force 300-25, a force 300_13, a , a mikrotik, and a 3000 epmp omni >> on this power strip. Circuit is less than 2 feet to the breaker. Breaker is >> in an extended panel I'm unaware of the wiring details. The first wtm >> powered with no issue. >> This is a 20 amp breaker, when the meanwell fried it didnt trip. But simply >> plugging in a powerstrip, with nothing in it, almost cost my contractor a >> hand. >> >> Any idea where I fucked up. This is a grain leg and they're not to find of >> explosions. >> >> I'm wondering, since they bond the dc return to ground if it's not >> energizing a chassis or something >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
