On 25/03/15 21:20, newshound wrote:
From google news

http://www.mirror.co.uk/news/uk-news...-after-5398069


Eeew. Poor *******.

The way this is handled in large mines (opencast at least with monster
trucks) is:

1) There is a master isolator on each vehicle;

2) The first man on the job shuts the isolator off then inserts a
locking device through the isolator lever and frame - this device whilst
in place prevents the isolator from being moved;

3) He them inserts his own personal padlock onto one of the many
positions on the locking device - this prevents the locking device from
being removed;

4) When he is done, he removes his own padlock;

5) If another man needs to work on the truck whilst someone else is, he
inserts his own padlock into another position on the locking device;

6) When the last padlock is removed, the locking device may be removed.


Also I noticed a lot of things like jacks and wheel chocks were painted
obscene colours like dayglo purple and pink. Not yellow - the trucks
were yellow.

A very effective and foolproof system. Clearly the oven above needed a
lockable isolator and a procedure - problem I suspect is that whilst the
mine always have trucks in the workshed, so the procedure is constantly
practised, going into the oven might have been such a rare event that
noone thought about it.