Dear all,
This is my first post on this forum, so hello!
We recently had some work done which included one ceiling light being turned into two, and the ceiling replastered.
After fitting wall switches and ceiling pendants, no 2 light wasn't working. So I went into diagnostic mode...
With the NEW cable dangling disconnected at both ends, my multimeter tells me there is continuity between live and earth. Obviously, this is suboptimal
However, this cable was at one point connected to the lighting circuit. Why didn't the live-earth fault trip the MCB? It's a Hager MT106 rated at 6A. (Our RCD covers sockets and shower only.)
I could understand this if the line/neutral polarity of the incoming cable was reversed. They are - black is line, red is neutral, black 2 is switched live. But I knew this, and would have connected new brown to old black line, and new blue to old red. The meter shows 240v across old line and old earth, and 0v across old neutral and old earth.
Any and all comments welcome.
A.
This is my first post on this forum, so hello!
We recently had some work done which included one ceiling light being turned into two, and the ceiling replastered.
After fitting wall switches and ceiling pendants, no 2 light wasn't working. So I went into diagnostic mode...
With the NEW cable dangling disconnected at both ends, my multimeter tells me there is continuity between live and earth. Obviously, this is suboptimal
However, this cable was at one point connected to the lighting circuit. Why didn't the live-earth fault trip the MCB? It's a Hager MT106 rated at 6A. (Our RCD covers sockets and shower only.)
I could understand this if the line/neutral polarity of the incoming cable was reversed. They are - black is line, red is neutral, black 2 is switched live. But I knew this, and would have connected new brown to old black line, and new blue to old red. The meter shows 240v across old line and old earth, and 0v across old neutral and old earth.
Any and all comments welcome.
A.