Connecting roof a/c condenser to outdated panel

[markebenson]

This is related to my other post. Commercial office building.

The panel is an old FPE without grounding rod that this a/c unit is connected to.

Are there further grounding requirements?

 

[JDB3]

3-wire system like we use to use, in the older days.

 

[markebenson]

3-wire system like we use to use, in the older days.

Thank you my friend! just wanted a second opinion.