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 <thatoneguyst...@gmail.com> 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 > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
