nuldraad

Nuldraad refers to the neutral or return wire in an electrical power system. It is typically colored blue in many regions, serving as a path for electrical current to return to its source, completing the circuit. Unlike the live or phase wire, which carries the electrical potential from the power source, the neutral wire is normally at or near ground potential. This is a crucial safety feature, as it helps to prevent electrical shock by providing a low-resistance path for current to flow back to the utility transformer or generator.

In a three-phase system, there may be a single neutral wire shared by multiple phases, or individual neutral wires for each phase. The neutral wire is essential for the operation of single-phase appliances connected to a three-phase supply, as it allows them to draw current between one phase and the neutral. It is important to note that while the neutral wire is usually at ground potential, it can carry current and therefore should be treated with caution. Proper grounding of the neutral at the service entrance is a standard practice to enhance safety. Disconnecting the neutral wire while the live wire remains connected can be dangerous, as it may leave connected devices energized at a reduced voltage.