Prior to loading an elevator car at an upper floor, which safety standard must be met?

The correct answer indicates that safety standards require an elevator car to hold 125% of its capacity prior to loading. This specification serves as a safety margin, ensuring that the elevator can handle loads above its rated capacity without compromising safety. The rationale behind this standard is that it accounts for various factors such as dynamic loads and potential uneven weight distributions that occur when passengers enter the car.

A properly leveled elevator is essential for safe loading but is not the primary standard explicitly mentioned in this context. The requirement for a securely closed door is crucial to prevent accidents, as open doors pose a safety hazard. However, it doesn't directly relate to the specific capacity requirement. The emergency system should always be functional, but its activation is not a prerequisite for loading the car. Therefore, the focus on the car’s capacity is a key safety measure that ensures the elevator can operate reliably under various conditions.