A simple bed upgrade guide to prevent power supply burning 
@Nathan_Walkner personally I only recommend mains voltage beds for Deltas and Z-bed Cartesian. It’s a big safety risk for Y-bed printers like an i3. Hobbyists and Chinese cloners are bad at flex wiring.
@Ryan_Carlyle I not know the 220V bed but I agree.
The standard connectors are for 6-10A and not made to be flexible … the people not fix the cable after the connector and when upgrade the bed supply, they use much ampere that the connectors made
… most of problem are made by users