PentVaer Posted July 2 Share Posted July 2 In the wiring diagram that came with the Shelly, the cables to power it tap that power before the CT clamps I guess meaning that the Shelly is not considered part of the load. That makes installation in my case much more complicated since it means I would have to split the 3 phase cables before the main breaker. So, can the CTs be put just before the main breaker and power for the meter (A,B,C) at some point after it ? Also are 10A breakers for A,B,C OK ? The installation doesn't specify an appropriate breaker size. Thanks for any info! Quote Link to comment Share on other sites More sharing options...
Members thgoebel Posted July 2 Members Share Posted July 2 22 minutes ago, PentVaer said: So, can the CTs be put just before the main breaker and power for the meter (A,B,C) at some point after it ? This is possible. Due to the fact, the Shelly pro 3EM is consuming very small power, I would suggest to use micro fuses with 300 to 500mA in fuse-holders: Click This measure protects the Shelly itself. A possible fault shall not cause massive damage. Thus, the device may be repaired… Quote Link to comment Share on other sites More sharing options...
PentVaer Posted July 2 Author Share Posted July 2 Terrific, thanks for the quick help. 1 hour ago, thgoebel said: This is possible. Due to the fact, the Shelly pro 3EM is consuming very small power, I would suggest to use micro fuses with 300 to 500mA in fuse-holders: Click This measure protects the Shelly itself. A possible fault shall not cause massive damage. Thus, the device may be repaired… Quote Link to comment Share on other sites More sharing options...
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