This indicates that the door consists of two separate door panels that open together. Double doors are often used for entrances to grand or elegant spaces.
It's important to note that the term "electrical" in this context seems unusual when describing a door. If you have a specific product or context in mind, it would be helpful to provide more details or clarify your question further. Additionally, doors like these are often custom-designed or manufactured to meet specific aesthetic and architectural requirements, so the exact features and design can vary widely.