What is one of the components that should be included in the system drawings?

The inclusion of a manual actuation device in system drawings is crucial because it provides a means for immediate activation of the dry chemical extinguishing system. This component allows personnel to quickly respond to a fire emergency by manually triggering the system, ensuring a timely release of the extinguishing agent targeted at the fire. Properly indicating this device in the system drawings ensures that it is accessible and clearly marks its location, which is vital for safety and effectiveness in emergency situations.

In contrast, while electrical outlets, lighting fixtures, and heating elements may be relevant to the overall facility layout or fire safety considerations, they do not pertain directly to the design and functionality of the dry chemical extinguishing system itself. Therefore, their inclusion in the specific system drawings is not essential for the proper operation of the extinguishing system.