There are other, smaller countries that have mixed frequencies.
PG&E (California' primary gas and electric utility) still has DC tariffs, thought I believe they provision it by installing a converter at the pint of use. I believe this is just for elevators.
Parts of Back Bay in Boston were still wired for 100V DC mains voltage into the 1960s
PG&E (California' primary gas and electric utility) still has DC tariffs, thought I believe they provision it by installing a converter at the pint of use. I believe this is just for elevators.
Parts of Back Bay in Boston were still wired for 100V DC mains voltage into the 1960s