Unfortunately, fault finding is one of the only open ended services we provide. And it is one of the most demanding services an electrician can carry out. It's usually both physically demanding, and mentally demanding. Generally, we say we can find 65% of faults within an hour, 85% of faults within 2, and once it gets to 2 hours we'll report back because 1) It's being a nightmare to find and 2) We want to start looking at other alternatives such as rewiring the affected part, or breaking and downgrading the ring, for example. For more information on some our stickiest fault finding projects, please see here.