According to the National Electric Code, submersible pumps and equipment shall operate at what maximum voltage between conductors?

The correct maximum voltage between conductors for submersible pumps and equipment, as outlined by the National Electric Code, is 300 volts. This specification is in place to ensure safety and reliability when dealing with equipment operating in potentially hazardous or wet environments, such as those found in commercial pools.

The limitation to 300 volts is crucial because it helps to mitigate the risk of electric shock or short circuits, which can arise from higher voltage systems in submerged applications. By adhering to this voltage requirement, contractors can ensure that the design and installation of electrical systems in aquatic environments comply with safety standards, thereby reducing hazards for both users and maintenance personnel.

It's essential to understand that while lower voltage options may be available, using a higher standard, such as 600 volts, would not align with the safety parameters set forth in the National Electric Code for submersible pumps.