Water Heater and Furnace Grounding/Bonding - Baltimore City

[Alex R.]

My rental has been experiencing quite a bit of electrical issues. I've had a few electricians diagnose the issue and have come to the resolution that I need a majority of the breakers replaced. 

As the electrician was inspecting the property, he indicated that Baltimore City requires the grounding of Water Heaters and Furnaces. Since we're replacing a few items, he recommended getting this done and getting the electrical up to code. 

Any thoughts? Anyone heard of grounding these appliances? Is this really necessary?

Thank you for your help and guidance!

Alex