[frrlpp]

DC high voltage (200v) is very dangerous and pernicious, and mores difficult to switch on and off because of arcs.

[flyinghamster]

Very old US light switches often had both AC and DC current ratings, and the DC rating was noticeably lower due to the arcing problem, even with fast-acting snap action.

My grandfather worked in a Chicago office building that had 110V DC service even into the 1960s. He had to be careful to buy fans, radios, etc. that could run on DC.

[stephen_g]

Yes, it’s more dangerous, but technically “high voltage” doesn’t start until 1500 V DC (and 1000 V RMS for AC) by most standards (e.g. IEC 60038)