Today I was called to install a new electrical cord on the master bath jacuzzi tub and to inspect the ground wires in the panel. The ground wires do have a bluish tint to them that is likely due to oxidation over the years. There is no evidence of burning or corrosion and all connections have been tightened. Thank you for having me into your home today and giving Mr Sparky the opportunity to earn your business. I have also sent you a link to a short survey, please take a minute to fill it out and let me know how I did today. Thank you. Tom Leonard