When is it permissible to install an igniter in a motor?

Installing an igniter in a motor is permissible at the pad or designated area by the launch director because this practice ensures that safety protocols are strictly followed. The launch pad is specifically designed for this purpose, allowing for controlled conditions and minimizing risks associated with igniting rocket motors. Having the launch director oversee this process further ensures that the installation adheres to established safety guidelines, as the director is responsible for managing the launch environment and ensuring that all safety measures are in place.

Conducting this task in designated areas helps to prevent any accidental ignitions and provides a clear, organized procedure for all personnel involved in the launch. It also allows for immediate safety responses if an issue arises during the installation.

In contrast, the other choices imply installing an igniter in less controlled environments or without sufficient oversight, which could lead to unsafe scenarios. Thus, having designated areas, typically managed by a launch director, is critical to maintaining safe operational practices in rocketry.