I want to sell an electrical product with an earthed, metallic enclosure for commercial use in Europe.
The wiring inside the product is pretty tight. Are there any laws that prevent me from having an earthed mains circuit in 600V insulated wire touching a low-voltage, earthed secondary circuit in 300V insulated wire?
If the 600V insulation fails (single fault) then the secondary is still protected with 300V insulation, and vice versa. Correct?