Have to have a chalk board to show the wild leg thing. I got my 3 phase down pretty cold now.
Had an electrician wire up a receptacle to the wild leg once. Blew up a transformer. That was my first exposure to a wild leg. From: Ken Hohhof Sent: Monday, January 8, 2024 11:54 AM To: 'AnimalFarm Microwave Users Group' Subject: Re: [AFMUG] -48V kicking the dead horse I would think many of us have both 24V and 48V in the same rack or cabinet. We started out 24V, then mixed, now able to do most sites all 48V, but lots of mixed 24 and 48 out there. I think of -48 as just another voltage to keep straight. If I power a radio or router with 48-56 volts that is intended for 24-30V, bad things will happen. Not sure what there is about polarity that drives people crazy. What I always have a hard time wrapping my head around is 240/120/208 wild leg delta. From: AF <[email protected]> On Behalf Of castarritt Sent: Monday, January 8, 2024 12:35 PM To: AnimalFarm Microwave Users Group <[email protected]> Subject: Re: [AFMUG] -48V kicking the dead horse The ICT shelves come in both +48v and -48v flavors. Usually the positive version has a P on the end of the model. An ICT-2U4 would be negative, and an ICT-2U4P is positive. You can mix both -48 and +48 loads at one site, but you need an isolated DC-DC converter such as a Meanwell RSD-500C-48. On Mon, Jan 8, 2024 at 10:26 AM Mark - Myakka Technologies <[email protected]> wrote: I know we have been though this many times and I thought I understood it. -48VDC is the Negative side being HOT, correct? It is BAD to try to mix -48VDC and 48VDC There is no such thing as a -48V battery. A battery is a battery, correct? How about the ICT Platinum power supplies. They show as 48VDC, can they be used on -48VDC equipment? I remember Check saying something about a way to test to see if a piece of equipment that is Neg 48VDC is truly grounded as Neg 48VDC. -- Thanks, Mark mailto:[email protected] Myakka Communications www.Myakka.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
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