The voltage between neutral and earth should ideally be close to zero. In a properly grounded electrical system, the neutral and ground are at the same potential, so there should be no significant voltage difference between them.
A voltage of 230 V between ground and neutral may indicate a problem with the grounding system or a poor connection.
This voltage may be due to a high impedance fault or may suggest that the neutral is not properly grounded at the service entrance or transformer.
Yes, the neutral is usually connected to ground at the service entrance of the electrical system. This connection helps ensure that the neutral is at the same potential as earth, providing a reference point for the electrical system and improving safety.
It is not normal to have current on the ground conductor. The earth must provide a safety path and not carry current under normal operating conditions.
If current is detected on the ground, it may indicate a fault or leak in the electrical system that needs to be corrected.
A current in the neutral can occur due to unbalanced loads in the electrical system or leakage currents. The neutral wire carries the return current from electrical devices to the source. If the loads are not balanced or there is a fault, current may flow through the neutral wire, which is a normal part of its operation. However, any large or unexpected current in the neutral must be investigated to ensure the safety and proper operation of the system.