The conductors that are installed through the nipple into Panel D are considered to be on the ___ side of the service.

In electrical terminology, the conductors that enter a panel are classified based on their function within the electrical system. When conductors are installed through a nipple into a panel, they are generally considered to be on the load side of the service if they are carrying current to branch circuits or equipment.

The load side refers to the portion of the electrical system that distributes power to various devices and circuits after the main service disconnect or panel. This is the part of the system where electrical power is utilized, as opposed to the line side, which is where power enters the panel from the utility supply.

Therefore, the conductors in question are on the load side of Panel D, as they are intended to supply power to the circuits connected downstream of the panel. Understanding this distinction helps in recognizing how electrical systems are organized and ensuring safe and effective wiring practices.