Mains transformer design for different mains frequencies

[kalee20]

Originally Posted by Richardgr

So back in time there could have a higher tariff for the power sockets because of the peak load impact, whereas the lamp circuit would fit comfortably in base load?

Possibly! It also occurred to me, rather than tax differences, maybe the power companies wanted to encourage electricity consumption in the early mornings and evenings, to spread the load, so they sold power for lighting (which was likely to be thus,) cheaper.