Discuss Vacuum on Demand (vid) supply on farm in the Electrical Forum area at ElectriciansForums.net

dlt27

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Hi, thanks for any advice. I have been asked to install supply for vod for vac pumps on a farm. I have been told it needs own dedicated supply as will trip RCD’s. Could anybody explain why it will trip an RCD ( does it create that much earth leakage?) The local board I was going to feed from has 100mA RCD protection and the mains has 100mA time delayed RCD. Can I feed from local board as if I come straight from time delayed then it won’t comply with disconnection time of 0.2s. Please don’t be afraid to tell me I’m thick if I’m missing something simple.
Thanks again for any help
 
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