The ONLY reasonable option in that case is to pull the fuse to make dead. If not accessible, you call whoever and wait.For instance (i have had it before ), some numpty had installed the tails the wrong way round. So everything within the installation was of a reversed polarity. Immediate code 1 for the entire installation. More practical for me to work live and change those tails around at the ccu rather than the risk to the client while waiting for a dno response (council as well so another ball ache entirely time+safety wise).
Two times I've had someone out they've not sealed the head. One was a contractor fitting an isolator at my home - I rang my supplier, they did it f.o.c. The other time was a DNO engineer who couldn't find any seals in his van.I have been incredibly fortunate,
Any time I have ever needed to work on tails, the seal wasn’t there when I turned up on site.
Actually in general time and cost are a consideration when assessing risk & avoidance/mitigation measures - hence the R in ALARP.From a health and safety point of view time and cost are not mitigating factors when risk assessing whether you should work live and demonstrates a lack of H&S knowledge when assessing the hazards
But, I've seen nothing in this thread where working live could be considered a reasonable course of action. I can't think of any normal situation where working live on a domestic supply could be considered to be the ALARP option.