It's tension / something similar in most of the latin type languages but all of the germanic languages...

"achtung! hauct spannung! " ?

But yeah, the ESB actually do put their logo, phone number (incase of emergencies), pole ID number and the DANGER ! Keep Away - RISK OF DEATH on EVERY pole along witht he guy being zapped... even on LV distribution stuff.

At least they're consistant!
[Linked Image]

The transmission pylons have their actual voltage.

HIGH VOLTAGE LINES OVERHEAD
DO NOT APPROACH ! - KEEP AWAY !
RISK OF DEATH

All train doors have a warning saying "HIGH VOLTAGE LINES OVERHEAD" and the little pictogram too.

Just incase anyone decides to climb up and touch the 25kV DC lines!