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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: What if the ground in the house is not in fact an earth ground? posted by Frihed89 on August 24, 2008 at 22:35:23:
>>In my last house the internal house ground was not even grounded to earth thanks to the contractor.<<
>>>>>>>>>>>>>>>>>>>>>>>>>>>In my area the power company will not do a hook-up if the main entrance neutral is not connected to earth ground properly.
But before the Power company will even come out for an inspection a release must first be given by the city inspection department.
==================>>But I assume the cases were grounded to the non ground throughout my system to what effect, I know not.<<
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>That means the equipment grounding conductor was connected to the neutral conductor at the main electrical service panel.
In the event of a leakage or short from the hot conductor to the case of a piece of equipment, with an equipment grounding conductor connected to a branch circuit with an equipment grounding conductor, then the equipment ground would have carried any ground fault current back to the source. If only a small ground fault leakage the current returning to the source would just become part of the circuit and be dissipated in the form of heat at the utility transformer.
If the ground fault from the Hot conductor to the case of the piece of equipment, resistance low, then the ground fault current will be high and cause an overload on the branch circuit breaker causing the breaker to trip open, thus doing its designed job.....
============Now back to why the main service entrance neutral is connected to earth.
The main purpose is for lightning protection. Another reason is for a common ground plane through out your home as well as the surrounding area outside your home where you might use power. There in main incoming metallic water, gas piping, or what ever else might be at earth ground potential......Though they will not admit it, connecting the entrance neutral to earth at every electrical service gives the utility company a somewhat added protection if for some reason their neutral conductor from their transformer becomes broken, for what ever reason, from the transformer to the house.
Also for lightning protection the neutral is connected to ground at every utility transformer...... Connecting to earth of the neutral up the ying yang for lightning protection.
Edits: 08/25/08
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- RE: What if the ground in the house is not in fact an earth ground? - jea48 06:57:20 08/25/08 (0)
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