If the offending light is tricky to have at owing to flat roof is it possible to divert?

Qusetions: when you possess a faulty lights wire which is inaccessable owing that it beneath a flat roof! is it attainable to consider the feed from one more light to a new four way junction box I enjoy that lights really should generally be in sequence but to renew the wire I can't get to it owing on the flat roof the only factor I can feel of is taking a whole new one.5 twin and earth through the residing area to a 4way Jbox after which another1.5mm Twin and earth wire on the bathroom light as that may be the light that will not be operating.what I can't fathom out is always that the wire which is faulty goes on the kitchen beneath the flat roof within the attic nevertheless all of the lights function within the Kitchen and their respective switches function .obviously the wiring is within the attic and i'm observant to change off the electrical in the shopper Unit just before I do any electrical function. I stay in the 3 bed bungalow with kitchen bathroom and 1living area.
please can any one particular advise!

Answers:So, you wonder if your wire is really faulty beneath the roof, appropriate?

I would do it by doing this: I shut off the major so no present-day arrives out on the box everywhere within the home. I open the bathroom light fixture and consider treatment to set the wires apart in which they are going to remain that way. Then I obtain a multi-meter and set it in the initial setting previously mentioned the voltage for the program (in the US we run lights in the home at 120 volts, so most meters would make use of the 250 setting). flip about the major yet again and go check the wires, touching your line and neutral wires using the good and damaging leads respectively. if your change is on in the wall, the meter really should indicate the voltage you be expecting. If absolutely nothing reveals, i'd go back again, shut off the major, arrive back again and place wire nuts about the open wires after which move forward on the change within the bathroom. Open that up and take away the change but depart the wires connected because they are. flip the major back again on and check the change wires using the meter. If they register voltage about the meter, you possess a lousy change. flip off the major yet again, restore the light fixture since it was and substitute the change with a whole new one particular. If it even now isn't going to function, then the circuit is almost certainly not about the exact same line since the kitchen.