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ubonr1971

How exactly does earth grounding work in a building

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We are renovating a building thats 40 yrs old. All old wiring is being ripped out. Have done this for the 3rd and 4th floor and have painted primer on all walls and ceilings. We are now ready to install new wiring on these 2 floors. New 3 prong sockets will be put in with light switches etc. We will re-use the existing electric boxes on each floor which is located above each stair case. 

 

Theres no existing earth (ground) and later a rod will have to be put in the ground / soil. 

 

But my question is.... If a critical electrical problem occurs, for example on the 4th floor, does each floor have to be wired (connected) to the main box on the ground floor which links up to the rod in the soil??

 

On Monday the electrician is coming to do wiring on the 3rd and 4th floor and thus want to know now should he be running wires / connection between the 2 floors. Then when we do the 1st and 2nd floor do we do the same and then do the rod thing in the soil??

 

If someone can explain in easy language it would be appreciated

thanks

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Why are you not replacing the existing boxes?

 

if I were going to that much time and money I would upgrade the boxes as well. 

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1 hour ago, mogandave said:

Why are you not replacing the existing boxes?

 

if I were going to that much time and money I would upgrade the boxes as well. 

to save money. i will post photos today of the old ones

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I would run an earth bus from the top to the bottom and connect to rod.  Connect the bus to each floor CU as your go or all at the same time, whatever.

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