What should the rating of receptacles for showcases be?

The rating of receptacles for showcases should be 20 amperes because this rating is typically suitable for the various lighting and electrical devices that may be used within display showcases. Showcase receptacles often need to handle a moderate amount of load, including multiple lights or other equipment, which can draw significant current. A 20-ampere rating provides adequate capacity while ensuring safety and functionality under normal operating conditions.

This choice aligns with industry standards that prioritize both performance and protection against overload. The 20-amp rating allows for versatility in equipment usage, ensuring that the receptacles can accommodate both the typical demands of showcase equipment and any additional accessories that may be utilized over time without risk of overheating or tripping a circuit breaker.

Receptacles rated lower than 20 amperes, such as those rated for 10 or 15 amperes, may not provide enough capacity to support the load required in a showcase environment, while a rating of 25 amperes exceeds what is typically needed and may not be compliant with standard practices or codes for light-duty application scenarios.