I hope the green wire ground isn’t now filling in for a missing neutral. I have run into electricians out in farming country who treat ground and neutral as interchangeable, as in if the neutral or ground bar in the breaker panel is full or inconvenient or missing (as in the case of some wild leg 3 phase farm setups which don’t use a neutral wire), they just use the other one. Because “ground is ground the world around”. Sometimes in farmhouses they will have a surge strip with the fault light always on, and you check out the wiring to the grounded wall outlet, and someone has just connected the ground screw to the white wire.
From: AF <af-boun...@af.afmug.com> On Behalf Of ch...@wbmfg.com Sent: Tuesday, January 15, 2019 11:15 AM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] SCADA porn Always good to keep anything conductive bonded to everything else. Shock prevention. Corrosion protection. From: Nate Burke Sent: Tuesday, January 15, 2019 8:20 AM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] SCADA porn I think this answers the why question "Some extra grounding was called for as per engineers" They probably don't actually know why it's needed. I just involved in a building project involving a 90hp Fire alarm sprinkler pump. One single power phase kept randomly going to undervoltage and setting the monitoring system into alarm. The Manufacturer said "We don't know why it's doing it, try adding another ground wire and see what happens" The Electrician said "That can't fix it, but I'll do it because you said so" Well, it fixed it, for some reason that nobody really understands or has been able to adequately explain. On 1/15/2019 8:08 AM, dave wrote: what is that ground for?? Looks like a ground to an outer seal of some sort. On 1/14/19 8:36 PM, Jaime Solorza wrote: Thanks. First time using the new Phoenix Contact managed switch...will share experience once we get things going... Some extra grounding was called for as per engineers... On Mon, Jan 14, 2019, 4:53 PM David M <dmilho...@wletc.com wrote: I finally got a good source for most of the interconnects,din rail and wire management stuff. I always like good clean boxes.. Awesome! On 1/14/2019 3:41 PM, Jaime Solorza wrote: Starting year off busy... -- 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
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