When are ground and neutral typically bonded?

The appropriate scenario for bonding ground and neutral is during prime power and standby generation. This practice is essential for ensuring safety and proper operation of the electrical system. When ground and neutral are bonded, it provides a clear path for fault current back to the source, helping to clear faults quickly through circuit breakers or fuses. This is particularly important in systems where generators are used for prime power or standby generation, as it prevents electrical shocks and potential equipment damage.

In prime power applications, bonding helps in establishing a reference point for voltage levels, enhancing the overall stability and reliability of the electrical system. Similarly, for standby generation, bonding ensures that in the event of a failure or a fault, the safety mechanisms within the electrical system can operate effectively.

This practice may not be applicable during maintenance checks, and it's not limited to solely residential systems or just when installing new generators. Each of these other scenarios does involve specific considerations, but the critical function of bonding ground and neutral primarily aligns with maintaining safety and operational efficiency during the active use of prime power and standby generators.