I have some troubles finding what the triangle symbol on the following diagram could mean. Diagram of the cabinet It is not a diode because in other parts of the diagram, it is used where an input is expected.

The box is an electrical cabinet that contains circuit-breakers. The top one is an input and the 4 bottom one are outputs.

I guess it could mean that the ground cable is linked to the cabinet casing but I couldn't find any confirmation on that online and it seems strange.

  • \$\begingroup\$ The lines, across he main line, show amount of conductors. So, triangle may be some kind of terminal. \$\endgroup\$
    – user263983
    Jul 13, 2023 at 14:09

1 Answer 1


In a single line diagram, such triangles or arrow heads represent outgoing feeders.

Here are some more examples.

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