I would like to get everyones opinion on the attached picture of a earth ground schematic of a commercial building.
I've been troubleshooting intermittent problems with a 4K video projection system with 4K video players that randomly fails for over 2 months. (6) 4K Digital projection units ran with a quad HDSDI line. The failures that occur can range from blacked out quadrants (loss of signal) on random projectors. All steps have been taken to troubleshoot this problem from replacement of video cable (1694A Belden) , replacement of video players, etc. Basically every step has been taken to troubleshoot from an A/V stand point of view. I'm now thinking it may be a ground fault in the buildings electrical system.
Noticing that this facility is also having other major equipment issues (also randomly) as well as frequent power outages, I thought that the commonality between that and the equipment I am troubleshooting is AC power. I decided to look at the grounds of the entire building a found multiple major earth grounds corroded. This building is only one year old, but here is the catch. I cannot disclose what or where this facility is, I can say however that the building is basically a large refrigerator that moisture and water build up is a big issue. The copper grounds are pretty much always exposed to water and ground minerals.
I do not have the equipment to do an impedance test at this time, although I know that this is the next step. The picture shows some really high leakage currents on ground that I preformed with a simple clamp meter. The fact that the generator ground is very low, it makes me think that there is a problem with the "Service entrance grounding conductor" potentially floating. I also attached a few pictures of the corroded grounds. I would love anyones thoughts on this.
Thanks!
Randy
I've been troubleshooting intermittent problems with a 4K video projection system with 4K video players that randomly fails for over 2 months. (6) 4K Digital projection units ran with a quad HDSDI line. The failures that occur can range from blacked out quadrants (loss of signal) on random projectors. All steps have been taken to troubleshoot this problem from replacement of video cable (1694A Belden) , replacement of video players, etc. Basically every step has been taken to troubleshoot from an A/V stand point of view. I'm now thinking it may be a ground fault in the buildings electrical system.
Noticing that this facility is also having other major equipment issues (also randomly) as well as frequent power outages, I thought that the commonality between that and the equipment I am troubleshooting is AC power. I decided to look at the grounds of the entire building a found multiple major earth grounds corroded. This building is only one year old, but here is the catch. I cannot disclose what or where this facility is, I can say however that the building is basically a large refrigerator that moisture and water build up is a big issue. The copper grounds are pretty much always exposed to water and ground minerals.
I do not have the equipment to do an impedance test at this time, although I know that this is the next step. The picture shows some really high leakage currents on ground that I preformed with a simple clamp meter. The fact that the generator ground is very low, it makes me think that there is a problem with the "Service entrance grounding conductor" potentially floating. I also attached a few pictures of the corroded grounds. I would love anyones thoughts on this.
Thanks!
Randy
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