The secondary voltage of distribution transformers is typically which of the following?

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Multiple Choice

The secondary voltage of distribution transformers is typically which of the following?

Explanation:
Distribution transformers step high distribution voltage down to the voltages that buildings and equipment actually use. The secondary side is the low-voltage side, and in the US it’s common to deliver 120/240 V for residential service and 480 V for some commercial/industrial setups (often as a 277/480 system in three-phase). The voltages listed as secondary in this context are those low voltages used by customers: 480, 240, or 120 volts. The other options are higher voltages that stay on the transformer’s primary or feeder side, not what’s delivered to end users.

Distribution transformers step high distribution voltage down to the voltages that buildings and equipment actually use. The secondary side is the low-voltage side, and in the US it’s common to deliver 120/240 V for residential service and 480 V for some commercial/industrial setups (often as a 277/480 system in three-phase). The voltages listed as secondary in this context are those low voltages used by customers: 480, 240, or 120 volts.

The other options are higher voltages that stay on the transformer’s primary or feeder side, not what’s delivered to end users.

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