For appliance branch circuits supplying more than one appliance, what is the minimum conductor size for a low voltage configuration?

The correct answer is based on the requirements for conductor sizing in low voltage applications. For appliance branch circuits that supply more than one appliance, a conductor size of 10 AWG copper (or equivalent) ensures that the wiring can handle the necessary current load without overheating or causing voltage drop issues.

Using a conductor size of 10 AWG is critical in a low voltage configuration because it provides sufficient capacity for multiple appliances, which may draw significant power collectively. This choice helps in maintaining safety by reducing the risk of conductor damage due to excessive current and ensures compliance with electrical codes designed to protect both installations and users' safety.

Larger conductor sizes, such as 8 AWG, may provide additional margin but are not required under typical low voltage scenarios where 10 AWG suffices. Meanwhile, using smaller conductor sizes, such as 12 or 14 AWG, would not support the needs of multiple appliances adequately and could potentially lead to overheating, circuit failure, and safety hazards. Therefore, 10 AWG copper is the minimum recommended size to effectively support the requirements of a multi-appliance configuration in low voltage setups.