The mains supply voltage in this setup is:

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Multiple Choice

The mains supply voltage in this setup is:

Explanation:
The mains supply voltage refers to the voltage between the two hot conductors in a split-phase system. In such setups, each hot provides about 120 V with respect to neutral, and the voltage between the two hots is about 240 V. So, if the circuit is fed between the two hot lines without using neutral, you’re supplying roughly 240 V. The other voltages would correspond to different situations: 120 V is hot-to-neutral, while 480 V and 600 V are higher-voltage distribution levels used for industrial three-phase systems, not typical for standard mains in a home setup.

The mains supply voltage refers to the voltage between the two hot conductors in a split-phase system. In such setups, each hot provides about 120 V with respect to neutral, and the voltage between the two hots is about 240 V. So, if the circuit is fed between the two hot lines without using neutral, you’re supplying roughly 240 V. The other voltages would correspond to different situations: 120 V is hot-to-neutral, while 480 V and 600 V are higher-voltage distribution levels used for industrial three-phase systems, not typical for standard mains in a home setup.

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