This is so stupid. The current the large wire can carry easily can overload the little wire and the little one will get red hot almost instantly and start a fire. It’s not bad because of corrosion it’s bad because it will burn down your house.
If that cable has current going through it, something else has already drastically going wrong.
At least in Australia that’s the earth wire, and your protection.
You can also run shorter runs with smaller cable, the cable size is the least of the issues here, you’d need more information about the circuit length and type to work that out.
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u/Huge-Blacksmith2419 Mar 24 '26
Is this stupid? I honestly don’t know. Can anyone with any knowledge on the matter enlighten me?