Insect control devices must _____ and must be able to retain the electrocuted insect inside the device?

Insect control devices must not be installed over food preparation areas to ensure food safety and hygiene. When these devices are positioned above areas where food is prepared, there is a risk that insects or parts of insects could accidentally fall into food products, thereby contaminating them. This is particularly important in food service environments where maintaining sanitary conditions is essential to prevent foodborne illnesses.

While installation on the ceiling may be a common practice, it is not a requirement that aligns specifically with the necessity of food safety over preparation areas. Other factors, such as visibility and the need for electricity, do not directly address the critical concern of preventing contamination in food handling spaces. Thus, the restriction on placing insect control devices over food prep areas is a key aspect of maintaining a safe and hygienic environment in food service operations.