On an insulated aerial device, if equipped, a DC pump is used to power which system?

In an insulated aerial device, the DC pump is typically used to power the secondary stowage system. This system is responsible for maneuvering and securing different components of the aerial device, allowing for proper operation and safety when operating at height. The secondary stowage system can facilitate functions such as retracting or positioning equipment, which is crucial when transitioning from operational to stowed positions.

The primary power system generally deals with powering the main functionalities of the aerial device itself, while the emergency stowing system is designed for safe and immediate retraction of the device in case of an emergency. The lighting system, on the other hand, is responsible for providing illumination but does not rely on the DC pump for its operation. Thus, the use of a DC pump in conjunction with the secondary stowage system is key to ensuring the equipment remains operational and secure.