Which of the following systems shall not be required to be grounded?
- A 120/240-Volt, single phase residential service supplying both 120V and 240V loads0
- A 120/240-Volt, three phase, delta system supplying 120V, general purpose receptacles in an office building0
- A 48-Volt, single phase, control transformer fed from a 480V supplyYour vote8
- A 480Y/277-Volt, three phase, WYE transformer feeding only three phase motor loads4