I am sure this is tccw but wanted to check in with the experts before I turn in my report. Appraisers office says this is a 1954 house but the site also says it 28yrs old so I am inclined not to trust this information.
Also I need help with this installation method of this type of surge suppressor.
The double tap for the surge protector is NG. The condcutors should land on a two pole CB.
Each of the neutrals need to be terminated in a single hole in the neutral bar.
Those look like tin coated copper conductors as you’ve suggested. The tin keeps the copper from reacting with the rubber insulation. Since all of the other conductors appear to be Thermoplastic, a conservative estimate would be that those tinned conductors have to be at least 30 years old.
Well he’s got 20 years in the trade. Your the HI and he’s the expert. A HI shouldn’t recommend replacement of anything with out seeing a problem. There is no visible issue with the wire, and like I said if you see one a evaluation was recommended. The electrician can do destructive test like bending the wire 90 degrees to see if the insulation cracks, we can’t.