interconections/bridges on ring circuits

[ianphilip007]

hi

after a little advice re testing to find an interconnection or bridge on a ring circuit, Now a bridge is really a series of spurs that has eventually been reconnected to the ring.the resistance readings at these points (sockets) would be higher than at other points in the ring would this be the best way to locate where to start and then break down from this point.

 

[Rockingit]

As in, two loops like a figure of eight? If so, then I'd have thought that you'd get resistance in parallel (just a guess) in which case it would surely be slightly lower at the intersections????

 

[telectrix]

not necessarily. sketch out a layout and you will find the bridge has created parallel paths which will reduce the expected resistance/s. the easiest method may be to find wherever there are 3 cables in back of an outlet. hopefully, you won't have half a dozen JBs hidden away under floors.

 

[ianphilip007]

so it should infact be lower if there is a bridge, does make sense when you draw it out 2 parrellel loops.
its only a theoretical question, how much lower would the reading be

 

[telectrix]

how long is a piece of cable. ? ..... could be anything.

 

[ianphilip007]

fair point i guess it depends on circuit length