Detecting mains wiring in walls and cables may not always be easy, but with this kit you would be able to detect mains voltage. Pin-point a break in your mains fly-lead to about 5cm.
EFK 4001 Continuity Tester
EFK 4002 Logic Probe
EFK 4003 Op-Amp Function Generator
EFK 4004 Signal Injector
EFK 4005 Zener Diode Tester