[frenchelectrican]

I will need little more tibbits in here what size conductor you are using and is this is copper or alum conductors ?

Second thing which I know it pretty common is improper toqure at the lug which it can result overheated lug like you posted the only way you can fix it properly is put in new subpanel { I will not bother to atempt to repair this one due there is pretty wide spread damage to netural bussbar }

Where is the grounding busbar is ??

Need second photo of the whole box then we can able determered to what the issue is.

Merci,
Marc

 

[frenchelectrican]

Wowie.,

That really open up couple cans of worms now let get start the main point I know you mention you did have a large motour before and no longer used that was ok with motour load due they have diffrent codes to deal with it but once you remove the motour off from that circuit then it will change back to normal circuit and you can not take a advange of specal code related for motour circuits.

Install 50 amp breaker and also check all the conductors if no other damage and I am not sure but it did look like some water issue due I can see little surface rust and the way the lugs on phase side show little surface corroison so I am pretty sure it have in hevey mositure area or have a conduit comming in from attic { this is one of few common curpit I have see due the condistation in the pipe useally do this } so if you see some condestion in the pipe then you will have to change the way the pipe or conductors to wick away from the load centré.

Other members allready got the majorty of the answer posted.

Ddawg ., If the OP mention this is semi attached then few case it may not need a ground rods { all it depending on the inspector say so }

Merci,
Marc