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A contact blade with a short bar marking a visible break.
Also known as: Disconnector, Isolating switch, Isolator, Contact with a bar
An isolator provides a verified open circuit for safe working, and it is not a load-breaking switch — opening one under load can draw an arc. The small bar on the symbol asserts an isolating gap, which is a safety claim rather than a drawing flourish.
Denotes a disconnector or isolator: a device establishing a verified isolating gap for safe working on a de-energised circuit.
Contexts: Electrical equipment
Is not rated to break load current in general; opening one under load is a recognised hazard and is why load-break versions are separately designated.
Contexts: Electrical equipment
Carries a short bar or wedge on the symbol asserting the isolating distance, which distinguishes it from an ordinary switch contact.
Contexts: Electrical equipment
A contact blade pivoting away from a fixed contact, with a short straight stroke drawn across the gap.