Not cycling related, but i was working in Uruguay last year, installing and commissioning some equipment.
They'd wired it in...i'm not an electrician (this is quite important to the story) but i do have a reasonable grasp of the practicalities. But i soon realised my grasp is limited when the going gets tough.
It all kept going a bit mental, a component blew on a main circuit board...and the only spare board is 6000 miles away
They fixed that after hours of investigation (then had to send a car 6 hours there and back to Montevideo for a component that probably cost £5), but i couldnt figure why the whole setup wouldnt work properly.
After many calls between me, my colleagues in the UK, the machinery suppliers, we began to suspect the neutral supply.
So so many tests and checks, is this wiring correct, is that correct , etc etc etc...
Trying to interpret from Spanish to English, interpret electrical drawings, trying to understand theroies that were WAY WAY above my ability, we realised they hadnt got a normal neutral on site, but had generated it from their main transformer....which was causing all the problems.
Two days of stress, headaches and a fast heartbeat...my head was virtually bursting
You cant walk away from it...you've only got so much time, tens of thousands of pounds has been invested in it (my costs alone were IRO £2500) and the next 3 months production depends on you fixing it.