Safety symbols
14
Icon Explanation
Direct current
The equipment is only suitable for direct current. Used for marking cor‐
responding terminals.
Protective conductor connec‐
tion
For marking the connection for an external protective conductor for pro‐
tecting against electrical shock in the event of an error or for a connect‐
ing terminal of the external protective conductor.
Ground
To identify the functional grounding.
General warning symbol
The documentation must be consulted in any scenario where the symbol
is axed in order to nd out the type of potential hazard and the actions
required to avoid the risk.
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA 159
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