When a line is known as a high leg, it is because the voltage between this line and the neutral conductor will be higher than the voltage between the neutral and either of the other two conductors.

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This is correct. A high leg, also known as a "wild leg" or "stinger leg" in some systems, typically refers to a three-phase power system where the phase-to-neutral voltage on one of the phases is significantly higher (by about 208 volts in a 120/240V system) than the other two phases. This high voltage leg can create safety hazards if not properly identified and isolated.

When a Line Is Known as a High Leg, It