In electrical engineering and installation, "TPN" stands for "Triple Pole and Neutral." It refers to a type of distribution board or electrical panel that is used to distribute electrical power in a three-phase electrical system, typically used in industrial or commercial applications. TPN distribution boards are designed to handle three hot phases and a neutral conductor.
A "double door" in this context usually refers to a type of electrical enclosure or distribution board cabinet that has two doors, typically one on the front and one on the back, for easy access to the electrical components and wiring inside. These double doors often provide additional safety and protection for the personnel working with the electrical equipment.
So, an "electrical TPN double door" likely refers to an electrical distribution board or enclosure designed for a three-phase electrical system with a neutral conductor and equipped with double doors for access and safety. These are commonly used in commercial and industrial settings where power distribution needs to be organized and protected.