 Welcome to the Network Engineering Video Blog. I am your host, Michael Crane. Well today, well let me give you a little background first. So if you remember in in one of our previous videos when we put an isolated ground that that's actually separate than the chassis ground and the rack ground. And that's to make it a little quieter so there's not as much noise on the grounds for the equipment. If you remember the power supplies and these routers are floating and so the chassis ground is actually separate from the power supply ground. And one of the the viewers of that video said well you installed these these PD. Okay well sorry for the interruption. Hi I'm editing this video and and I noticed that I have no audio. This wireless headset microphone I'm using right here. The cable on it's kind of flaky and I think the batteries are also low. I think I was doing another video. Batteries just completely died in it. It looks like it just stopped working all of a sudden. And of course I don't know that and so I'm just blabbing away. I have no idea that I'm not being recorded. So what I'm gonna do is I'm gonna see if I can explain what's going on here. So and by the way if you wondered what I use to edit videos with I use Adobe Premiere Pro CC stands for cloud something or other 2019. That's pretty nice. It's a subscription based product about 20 bucks a month or something like that which is which is pretty good and it keeps you up to date. That's pretty nice software. So okay that's about the editor. All right here we go. So what I'm saying I think is that yeah we installed these two PDUs in a previous video and one of the viewers commented that that these PDUs the ground on these PDUs is probably tied to the cases which is you know and of course the cases are bolted to the rack and so my nice clean isolated ground for the receptacles are actually getting muddied up by the equipment rack ground right. And I'm saying okay so what I'm gonna do is I'm gonna pull these guys out. There's probably a ground wire coming from the outside plug and it's probably bolted. Okay so the first let me go back and there's probably a cup of wire going to the PDU case and I'm just gonna disconnect that wire and and that should that should fix us up right. And that's that's pretty much I think what I was saying. So here we go. The rest of the video seems to be okay. Okay so the first thing we want to do is disconnect the power. All right just unplug these guys and unplug all our equipment. Okay sorry about that. I did unplug them our new receptacles with our isolated grounds but I had the camera zoomed out or zoomed in and you probably didn't see that. So anyway so we've unplugged them now I'm just gonna untie them and one of the one of the also another viewer asked or maybe it was the same one I don't remember asked why I didn't I didn't actually shorten these these cables and and my answer pretty much was I was just too lazy to do it. I didn't want to go I just didn't want to mess with it. It was easier just to bundle them up and just stick them on the rack right. So now let's pull them out. All right hopefully I'm not standing right in front of the camera. Okay I think I think that about does it let's get them out let's put them on the bench. Okay Doki let's go ahead and get these brackets off here real quick. Well it looks like this bottom panel will pull off if we remove enough screws. So let's try it. Well I've been sitting there talking and and I forgot to hit the record button so I'm not exactly sure where I left off. Anyway I pulled the cover open and sure enough here is the ground screw connecting to the chassis. It's got nice wire it's properly crimped with an eyelet and it's got a shake proof washer and a nut on there. But it also ties over to the the case right there and I thought I saw another one yeah there's something oh this is just for this outlet up here. Yeah what we need to do is there's two points right here we need to remove this ground from the chassis here and here and then that should be the only spots where it's tied to the the case. Okay so we'll take both these off we'll tie them together and then I'll tape them up real good so they don't they don't contact anything else inside here and that should isolate this enclosure from the isolated ground okay and then and I don't think anything else is in here but we'll test it before we button it back up. I think that's the best way to do it okay okay so I found a screw and a nut and it has a shake proof washer on it. I think I'll just tie these two together and then just just tape this one up I want to keep our ground going to our receptacles or isolated ground going to our receptacles. All right and this right here I think I'll just put a little shrink tape or heat shrink on it okay so I've got my heat gun okay we got this I got some electrical tape I think I think that'll be just fine all right so I'll put it together now oh meter out here let's test it hopefully everyone can see that okay all right yep okay make sure I'm testing the right wire here let's say this is common okay we got the right wire because the commas go through actually the ground should go through too yep now let's check the chassis I was doing on a screw oh did we miss something oh you know what oh a bunch of all these sockets oh man okay well that's a fail okay so I went ahead and took this thing apart again and and pulled one of the sockets out and and it doesn't look like I can unstrap that ground it looks like it is pretty much tied directly I mean it's in fact let me just take it apart here real quick so here's the ground and it's riveted looks like in three different places plus it looks like it's it's holding this thing together somehow I'm not exactly sure if you guys can see that very well but so yeah yeah I don't think we're gonna be able to to use that unfortunately don't forget you can support the network engineering video blog by donation using a credit card and PayPal or by purchasing products at the muxall store details and links are in the description under this video well that's it for this video if you like the video give it a big thumbs up that helps and hit the subscribe button that really helps if you have any questions or comments post them in the comments under this video thanks for watching and I'll see you next time