Fronius LaserHybrid Ultracompact Operating Instructions Manual page 62

Hazards from fly-
ing sparks
Hazards from
welding current
Vagrant welding
currents
60
Move all combustible objects well away from the welding location.
Welding must NEVER be performed on containers that have had gases,
fuels, mineral oils etc. stored in them. Even small traces of these substances
left in the containers are a major explosion hazard.
Special regulations apply to rooms at risk from fire and/or explosion.
Observe all relevant national and international regulations.
An electric shock can be fatal. Every electric shock is hazardous to life.
All welding cables must be firmly attached, undamaged and properly insulat-
ed. Replace any loose connections and scorched cables immediately.
If the following instructions are ignored, vagrant welding currents may occur.
These can destroy earthed conductor terminals, the power source being
used, the LaserHybrid welding head and other electrical equipment.
Ensure the workpiece clamp is connected tightly to the workpiece.
On electrically conductive floors, the power source must be set up in such a
way as to be insulated from the floor, wherever possible.