"Pete C." wrote:



A pure delta service does not have a neutral at all. There is no 120v on
it, only 240v phase to phase. The corner ground is strictly for safety
purposes to limit the relative voltage from any phase to ground. This
can make that phase look superficially like a neutral, but it is not.

Wrong.
If it is a grounded (not grounding) circuit conductor, it IS a
neutral, by definition.
jk