Final answer:
The white conductor in a 12/2 with ground SO cord can be used to connect to 240-volt lighting fixtures as part of a three-wire electrical system.
Step-by-step explanation:
The white conductor in a 12/2 with ground SO (flexible) cord can be connected to 240-volt lighting fixtures. This is true.
In a three-wire electrical system, which includes a neutral wire, the white conductor or neutral wire is connected to the earth or ground at the voltage source and user location. This connection forces the neutral wire to be at zero volts relative to the ground and provides an alternative return path for the current to complete the circuit.
It is important to note that wire insulation colours can vary with region, so it is always necessary to check locally to determine which colour codes are used.