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Surprised black (HV power) isn't on there.
When I did my ground services clearance NVQ, many moons ago, the instructor told us that hitting HV is normally safer than LV. This was explained to me that the cut offs (RCDs I think but I am not a sparx) tend to be more sensitive and better maintained so it cuts off quickly. You still get an explosion but are unlikely to have some poor sod literally stuck to any uncovered line. I was very sceptical of this at the time, is any qualified person able to confirm or deny?
Bobbo
We uncovered a yellow plastic pipe on the neighbours side, very shallow in a flowerbed when we were rebuilding party wall foundations.. no boom either but our ground workers come across this regularly, in fact expects it despite what is indicated on utility layouts from highway to house often not that accurate for proximity.