What must cord connectors for carnival circuses and fairs be when laid on the ground in wet locations?

The correct answer emphasizes the importance of safety standards for electrical equipment used in environments such as carnival circuses and fairs, particularly in wet locations. Cord connectors that are listed have been tested and approved by a recognized standards organization, ensuring they meet specific safety requirements. This means they can safely handle the electrical loads and environmental conditions they will be exposed to, particularly when placed on wet ground.

Having a listed product is essential to prevent issues such as electrical shock or short circuits, which are heightened in wet conditions. While options that suggest outdoor ratings, submersibility, or insulation also reflect desirable characteristics for electrical components, the primary qualification for ensuring safety and regulatory compliance in these specific conditions is that the connectors must be listed. This guarantees adherence to the standards that protect both the users and the public in such dynamic and potentially hazardous environments.