It's not what you think! I don't want to do this - I think it's already been done for me.
Peruse the diagram: concentrate....
There are three rooms involved here: the kitchen and two bedrooms (between which I an rebuilding a stud wall). The temporary junction box (circle with JB) is taking the place of an original socket (in that wall I'm rebuilding) and has three cables (the red, green and pink lines) running from it.
In one bedroom (top) I have a socket with two cables which I have been using to test the ring is live using a storm lamp. Then we have two other sockets, one in each bedroom, with a single cable each; obvious spurs then.
Lastly we have a kitchen socket which has two cables, the blue and the green cables - so you would assume this this is on a ring, wouldn't you?
The diagram is loosely based on how the cables are under the floorboards; specifically the sockets they head off towards.
I wanted to work out which of the cables I can see was the one that went off to the spur, so I could add a new socket to the ring in my shiny new wall (which would only involve another 2m of new cable). Thinking the green and blue cables *must* be part of the ring I disconnected the pink cable, but all the sockets continued to work. So, I disconnected the red cable, but all the sockets *still* continued to work. uh...
So I disconnected the green cable and the "southern" spur stopped working! All the other sockets still worked too *except* the kitchen socket. Now, the only way that could happen is if the blue cable (connected via the green cable and the kitchen socket) went to that spur. Now, if the blue cable *were* part of the ring the kitchen socket would still work, yes? But with the green cable disconnected it doesn't.
So, it looks like the original house wiring includes a spur off a spur. Or is my logic floored...
Share your wisdom. Ta.
(FYI: I pulled up a few more floor boards in the "northern" bedroom and the "northern" spur is fed off the red cable via a junction box. The ring continues off toward the other socket in that room. There used to be another wall in the kitchen below, so I'm assuming there was a socket down there which was part of the ring and is now replaced by the Junction box. The only other plug socket upstairs has two cables so I assume is part of the ring; it's in the general direction the pink cable is off to. Yes, a couple of assumptions there, I know.)
Peruse the diagram: concentrate....
There are three rooms involved here: the kitchen and two bedrooms (between which I an rebuilding a stud wall). The temporary junction box (circle with JB) is taking the place of an original socket (in that wall I'm rebuilding) and has three cables (the red, green and pink lines) running from it.
In one bedroom (top) I have a socket with two cables which I have been using to test the ring is live using a storm lamp. Then we have two other sockets, one in each bedroom, with a single cable each; obvious spurs then.
Lastly we have a kitchen socket which has two cables, the blue and the green cables - so you would assume this this is on a ring, wouldn't you?
The diagram is loosely based on how the cables are under the floorboards; specifically the sockets they head off towards.
I wanted to work out which of the cables I can see was the one that went off to the spur, so I could add a new socket to the ring in my shiny new wall (which would only involve another 2m of new cable). Thinking the green and blue cables *must* be part of the ring I disconnected the pink cable, but all the sockets continued to work. So, I disconnected the red cable, but all the sockets *still* continued to work. uh...
So I disconnected the green cable and the "southern" spur stopped working! All the other sockets still worked too *except* the kitchen socket. Now, the only way that could happen is if the blue cable (connected via the green cable and the kitchen socket) went to that spur. Now, if the blue cable *were* part of the ring the kitchen socket would still work, yes? But with the green cable disconnected it doesn't.
So, it looks like the original house wiring includes a spur off a spur. Or is my logic floored...
Share your wisdom. Ta.
(FYI: I pulled up a few more floor boards in the "northern" bedroom and the "northern" spur is fed off the red cable via a junction box. The ring continues off toward the other socket in that room. There used to be another wall in the kitchen below, so I'm assuming there was a socket down there which was part of the ring and is now replaced by the Junction box. The only other plug socket upstairs has two cables so I assume is part of the ring; it's in the general direction the pink cable is off to. Yes, a couple of assumptions there, I know.)