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Post by breckjensen on Nov 7, 2017 1:58:56 GMT -8
Hello , I would like to know if there's a possibility to make the ranking list of our previous campaigns available anytime. Ranking List is available for the current campaign only during the campaign and if I remember well from last year, it is available also for about one month after the end of the campaign. I think that all winners will like to see the old ranking lists all the time. Please help. Thanks! campaign advertising
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Post by breckjensen on Oct 23, 2017 7:36:30 GMT -8
Hello everyone, I have a quick question regarding Din rails, chassis ground and ground loops. Here is where I am getting confused. I connect my back panel to earth ground which, connects my control panel chassis to earth ground. I screw din rails on my back panel. Question #1: logically, my din rails are now connected to earth ground through the screws connecting to din rails to the back panel. Am I wrong here? As I have seen in many control panels, I connect a ground terminal block to my din rail and connect it to earth ground (the terminal block couples with the din rail through metal clamps). I now use that ground terminal block as a single point source to ground all my other components in the control panel (I connect my ground terminal block to earth ground using a wire).. *** the ten thousand dollar question is Didnt I just create a ground loop between my ground terminal block mounted on the din rail and my back panel chassis ground. For one reason or another the two different location might be at slightly different potentials causing current to flow. Where is my logic off here? I didn't find the right solution from the internet. References: mrplc
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Post by breckjensen on Oct 23, 2017 7:35:29 GMT -8
It's a common practice in our plant to store electrical spare parts in the bottom of control cabinet enclosures. They're not in the way and don't interfere with troubleshooting the cabinet. I've been told that this practice is a violation of NEC, but I can't find it anywhere in NEC or in NFPA 79. Or on Mike Holt's site (I'm not a member there). Is this a code violation? If so, what section?
I didn't find the right solution from the internet.
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