Where are relays typically mounted for their insulation and durability?

Relays are typically mounted on backboards to ensure proper insulation and protection from environmental elements that could affect their performance and durability. The backboard serves as a sturdy surface that provides stability while allowing adequate airflow and heat dissipation. This mounting location also aids in maintaining the integrity of electrical connections and provides a clear organizational layout for the control system.

While relays could be found in control boxes, these boxes might not offer the same level of exposure protection that a dedicated backboard does. Similarly, mounting relays inside motor casings may hinder accessibility and could expose them to vibrations, heat, or other adverse conditions affecting their longevity. Elevator doors, while having some components mounted on or near them, do not typically provide the insulation or protective qualities required for relays. Thus, mounting on backboards is the optimal choice for ensuring the long-term operational effectiveness of these components.