2 May
2012
2 May
'12
12:32 p.m.
battery or pneumaticly driven hand-tools is safer
because of this.
'Portable' electrical power tools used industrially (like electric drilsl
on building sites, etc) in the UK have to be 110V devices run from an
isolating transformer with the centre tap of the secondary conencted to
earth gorudn .The idea is that the maximum shock that the user can
receive from any point to earth is 55V which is unlikely to be fatal.
FWIW, the transofrmers used for this are quite useful for testing US
equipment over here, provided that device doesn't assume that one side fo
the mains input is groudned (nothing should do, but...).
-tony