What is a common safety protocol when entering a confined space with potential hazards?

Using teams or a buddy system is a fundamental safety protocol when entering a confined space with potential hazards. This approach ensures that there is always someone available to provide assistance in case of an emergency. A team can monitor each other's safety, provide support, and execute rescue plans if necessary. Confined spaces can pose various dangers, such as poor air quality, toxic atmospheres, or limited exits, making it crucial to have a second person present who can help if a worker encounters difficulties or becomes incapacitated.

The other options, such as leaving doors wide open or ensuring high temperature levels, do not promote safety and could potentially increase hazards while working in confined spaces. Restricting access might be necessary in some contexts but does not directly support individual safety measures once a trained individual enters the space. Therefore, the buddy system represents a vital strategy for ensuring safety in these environments.