Originally Posted by meganjoe
Also found this explanation online..
"Some appliances and electronic devices may be damaged if polarity is reversed
Which part in a coffee maker was damaged? Why would reverse polarity damage it? Just because you saw damage does not mean polarity was relevant. I have done this stuff professionally for 40 years. Suddenly everything I knew was wrong because someone posted something on the internet - without even one reason that says why?
It was on the internet - so it must be true. Classic junk science reasoning.
Multiple posters noted reverse polarity does not cause appliance damage. Even posted were some reasons why including galvanic isolation and filters intentionally designed to work with every polarity. Even made obvious by "black wire + when white wire -" and "black wire - when white wire +". Why ignore that? If reverse polarity causes damage, then AC cannot exist. Because polarity is constantly normal and reversed 60 times every second.
Conclusions only from observation are classic junk science reasoning. That quoted poster has no electrical knowledge - as demosntrated by the missing reasons why. Same logic also proved smoking cigarettes increases health. Why do you let them brainwash you. Every part in the coffer maker sees normal and reversed polarity 60 times every second. So every coffee maker must be damaged when connected to AC mains - using his reasoning.