the primary switchboard may be of open-terminal form or in the outdoor
weatherproofed form; it is now more common, however, for
these primary switchboards to be enclosed within brick-type enclosures,
in which case, conventional indoor metalclad type switchgear
is more commonly used (most 11 kV rural primary switchboards are
of the metalclad-type, whereas at 33 kV, open-type busbar connected
switchgear is more common)