Are the terms “neutral” and “ground” mean the same thing?

A neutral is a connection to an electrical system. In a three-phase WYE configuration, one end of each of the three generator or transformer windings is connected to a common point. This common point is called the neutral connection. The single-phase three-wire system is the common arrangement used to supply power to individual residences. The single-phase three-wire configuration consists of a single-phase transformer with two 120 volt secondary windings. The center connection between the two secondary windings is called the neutral. The neutral connection allows the three-phase WYE and the single-phase three-wire systems to each provide two different voltages. Both line-to-line and line-to-neutral voltages are available for powering different loads.

In most cases, grounding can be defined as a connection made by direct metal contact with earth where its large mass serves as a zero potential reference point. Under normal conditions, an electrical system can deliver power to equipment even without grounding. However, proper grounding is required for the prevention of fires, personal injury, or equipment damage in the event of an abnormal condition. Electrical system grounding is the intentional connection to ground of one of the current carrying conductors of the system. The majority of grounded systems use the three-phase WYE or single-phase three-wire configuration with the neutral grounded. This results in each phase of the system being at the same potential reference point above ground. Because the neutral is normally grounded, it is not uncommon to hear the terms “neutral” and “ground” used interchangeably. The most important distinction to make (in terms of conductors) is that a neutral wire may carry load current under normal conditions, but a ground conductor will not.