Little sparks can cause burnt on any wiring even if they are gigantic amps, you can't always judge base on what your wiring setup is, it's better to be safer than sorry, always stay around your mining equipments from time to time and be sensitive to smells and odours, it's the fastest way to know that something is wrong
Yes, there is higher chances that it was sparks rather than too much power draw. Anyway, will put the new part tomorrow... Of course I realized only after dismanteling one of my rig completely that it was coming for the plug ^^
Well it was time to clean it up anyway