NigelL Posted November 26, 2018 Share Posted November 26, 2018 Is there a preferred method of connecting two or three wires to a single terminal of a circuit breaker? I have seen installations where two wires are twisted around each other and then clamped in the terminal, but have also seen comments that this is very bad practice. I see that SANS 10142-1 does not allow more than 3 wires to be connected to a single terminal. Quote Link to comment Share on other sites More sharing options...
___ Posted November 26, 2018 Share Posted November 26, 2018 I pretty much shove both of them in there side by side and clamp it down. End of story :-) If one wire is multi-stranded and the other is not, then sometimes this practice yields less than optimal results (ie the thicker wire takes away most of the clamping force and the other one might not be properly clamped. Some breakers (ABB for example) have two insertion points. This is actually there so that you can have a busbar in the one, and an additional connection on the other one, but also helps when you need to connect more than one wire. Quote Link to comment Share on other sites More sharing options...
NigelL Posted November 26, 2018 Author Share Posted November 26, 2018 Thanks - for the feedback! Was just wondering if there were any other options I had not considered Quote Link to comment Share on other sites More sharing options...
bluwater Posted November 26, 2018 Share Posted November 26, 2018 If you are combining two wires a much cleaner method is to use a 2 wire ferrule like the one below. But it only recommended if both wires are the same size. NigelL and Chris Hobson 1 1 Quote Link to comment Share on other sites More sharing options...
SilverNodashi Posted November 27, 2018 Share Posted November 27, 2018 Sparkies generally twist the wires together as it's easier to get them in and both wires are secure better together. It's better and safer to use ferrules, though there's no regulation for it (yet?) and they only cost a few rand Quote Link to comment Share on other sites More sharing options...
Daddy Posted November 13, 2021 Share Posted November 13, 2021 Hi, I need to know according to SANS,two circuits connected under one single breaker,in coc you can count it one circuit or two,because I can't see SANS reffenrence any helpe. Quote Link to comment Share on other sites More sharing options...
Jonotwin Posted 23 hours ago Share Posted 23 hours ago On 2021/11/14 at 1:25 AM, Daddy said: Hi, I need to know according to SANS,two circuits connected under one single breaker,in coc you can count it one circuit or two,because I can't see SANS reffenrence any helpe. Reviving Old Post " What you are looking for is SANS 10142-1:2020 Edition 3 6: Installation Requirements 6.1.5 A Maximum of three conductors may be connected to any one terminal... " No Copywrite Violation intended. Quote Link to comment Share on other sites More sharing options...
Virwat Posted 16 hours ago Share Posted 16 hours ago ......and the next post in this thread..... in 2 years time. TaliaB 1 Quote Link to comment Share on other sites More sharing options...
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