Premium Members Alan Rencher Posted February 12, 2016 Premium Members Report Share Posted February 12, 2016 I posted this in the wrong thread. I moved here to the correct one here: http://www.steadicamforum.com/index.php?showtopic=23257&p=115877 Quote Link to comment Share on other sites More sharing options...
Premium Members Jess Haas SOC Posted February 12, 2016 Premium Members Report Share Posted February 12, 2016 What you describe happens if you pull 12v from the second battery in the series but if you pull it from the first then the 12v and 24v lines are sharing a ground so there should be no voltage potential between properly grounded BNC terminals of sled powered components. Quote Link to comment Share on other sites More sharing options...
Premium Members Jess Haas SOC Posted February 12, 2016 Premium Members Report Share Posted February 12, 2016 The sparks I have seen have all been caused by wiring faults or floating grounds. If you are powering two devices from separate power sources and the grounds aren't tied together or to earth ground it is possible for one of them to have some current build up on the ground line. When you connect them with a BNC the current jumps to ground and you see a spark. I used to see this a lot more often with CRT monitors for whatever reason. If you have a device with a faulty ground power connection current can decide to flow over the ground line of the BNC instead of your power cable. This is what usually frys SDI boards of devices as the SDI board was not designed to handle that kind of current. Also if insulation breaks down and non grounded metal surfaces become energized they will spark to ground. I had that happen with my Anton Bauer SO-XLR plate where the metal bodied XLR connector started sparking with things. -Jess Quote Link to comment Share on other sites More sharing options...
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