Equipment Safety Symbols
Direct current
Alternating current
Both direct and alternating current
Three-phase alternating current
Earth (ground) current
Protective conductor terminal
Frame or chassis terminal
On (power)
O (power)
Equipment protected throughout
by double insulation or reinforced
insulation
Caution, possibility of electric shock
Caution, hot surface
Caution*
In position of bi-stable push control
Out position of bi-stable push control
Ionizing radiation
Symbol Description
* Manufacturer to state that documentation must be
consulted in all cases where this symbol is marked.
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