A transformer for outline lighting requires a switch with a rating of at least how many times the current rating of the transformer?

For a transformer used in outline lighting, the recommended practice establishes that the switch must have a rating that is at least two times the current rating of the transformer. This requirement is in place to ensure safety and reliability in the electrical system.

Having a switch rated for twice the current ensures it can handle potential inrush currents when the circuit is energized. Transformers can draw a significantly higher current at startup due to inductive loads, and a switch with a rating of only the normal operating current might not withstand these higher levels safely. By selecting a switch rated for double the current, it provides a safeguard against overheating and ensures the switch can operate reliably under various conditions, extending its lifespan and overall safety.

This practice is rooted in standards that prioritize the protection of both equipment and people by ensuring that the components used in electrical installations have adequate ratings for the demands placed upon them. Always referencing applicable electrical codes is essential in confirming that correct practices are being followed in electrical installations.