What is the advantage of a 3-phase supply in residential services?

A 3-phase supply offers greater reliability in electrical distribution compared to single-phase systems. This is due to the way power is delivered through three alternating currents, which are offset in phase by 120 degrees. This arrangement can provide a more consistent and balanced load, reducing the likelihood of voltage drops and power fluctuations that can occur in single-phase systems.

In residential applications, a stable power supply is crucial to ensure that appliances operate effectively and to minimize the risk of disruptions or damage caused by power surges or outages. A 3-phase supply can better handle the demand from multiple high-powered devices, ensuring that homes with significant electrical needs, such as those with electric heating or industrial equipment, operate smoothly and efficiently.

While other options may suggest various benefits, such as installation cost or maintenance, they do not capture the primary advantage of a 3-phase system, which is its reliability and efficiency in distributing electrical power, especially under heavy or fluctuating loads.