3.6 insulation configuration terminal: Any of the electrodes between any two of which
a voltage that stresses the insulation can be applied. The typeso f terminal are:
a) phase terminal, between which and the neutral is applied in service the phase-toneutral
voltage of the system;
b) neutral terminal, representing, or connected to, the neutral point of the system
(neutral terminal of transformers, etc.);
c) earth terminal, always solidly connected to earth in service (tank of transformers,
base of disconnectors, structures of towers, ground plane, etc.).