Difference between neutral and ground wire

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SUMMARY

The discussion clarifies the critical differences between neutral and ground wires in household electrical systems. The neutral wire is designed to carry current continuously, while the ground wire is intended solely for safety, carrying fault current only during electrical faults. Interchanging these wires is unsafe and against electrical codes, as it can lead to overheating and potential hazards. Proper understanding of these functions is essential for safe electrical installations.

PREREQUISITES
  • Understanding of household electrical wiring systems
  • Knowledge of electrical safety standards and codes
  • Familiarity with the function of circuit breakers and fuses
  • Basic principles of electrical potential and current flow
NEXT STEPS
  • Research the National Electrical Code (NEC) regarding grounding and bonding requirements
  • Learn about the differences in wire sizing for neutral and ground conductors
  • Study the role of circuit breakers in protecting against ground faults
  • Explore the implications of voltage drop in long runs of neutral wire
USEFUL FOR

Electricians, electrical engineers, and homeowners seeking to understand safe wiring practices and the importance of proper grounding in electrical systems.

shubhamdixit
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in household supply, one wire is neutral wire and another is ground. Both are at 0 potential. My question is that can we interchange both wire. I mean use live wire with ground?
 
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shubhamdixit said:
in household supply, one wire is neutral wire and another is ground. Both are at 0 potential. My question is that can we interchange both wire. I mean use live wire with ground?

No, the 'ground' wire should never carry current unless there is a fault. The neutral wire is designed to carry the circuits current continuously and is sized appropriately. The ground wire is designed to carry a fault current for a short time until a protection device like a fuse or breaker stops the current so it's usually smaller and may overheat quickly.

In addition to code safety problems there are other reasons not to do it.
http://www.mikeholt.com/technical.p...lGroundVoltage&type=u&title=Neutral-to-Ground
 
The Neutral is really part of the circuit supplying the power, and if you are far from your panel - there may be some small potental on it.
The Ground wire is really for your safety and ideally ensures all of the surfaces you touch are at the same, hopefully Zero, voltage.
Electrically what you propose is OK - assuming the ground and neutral are the same - but this is NOT something you should be doing in reality.
 

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