Proper Grounding Question...

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NolaTigaBait

NolaTigaBait

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New Orleans,LA
ok, i have a meter/main combo(12 space) about 25 feet from the house...its grounded with one ground rod and there is a #4 bare bonded to the neutral bar...in a case where the service is away from the house whats the best way to bond the water...the largest conductor that is run from the house is a #6copper(theres and old 6 circuit fuse panel in the house)...also, i n eed to have 2 ground rods at the service as well...right?...
 
NolaTigaBait said:
. . . whats the best way to bond the water . . .
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You don't have water in this structure, drive two ground rods. Run a four wire feeder to the home, keep the grounding and neutral bars separate (250.32), connect to the water and CEE (two ground rods if CEE is not installed) the same as in 250.66 but only to the grounding bar. DO NOT install a main bonding jumper. Yes, you need a main disconnecting means (225.31).
 
let me be more specific...the SERVICE is 25 ft away from the house..it has a 60 amp breaker...running from that breaker is 2 pieces of thw(not quite sure what insulation),#6 copper and a #6 copper grounded conductor..there is no ground running with the feeders..its run in 1'' rigid underground to a j-box....so let me get this straight at the service, i need 2 ground rods? b/c there is no other available grounding electrodes....the house is old and im just trying to get the grounding system to code...atthe house there is a 6 circuit fuse panel(no disconnect)...i didn't really get too much into the job, so my question is at the house, what are my options to bond the water?...
 
not trying to sound like a jack leg electrician...its just that i ve never encountered this kind of service before...the service is usually on the house and i can run the proper size grounding electrode conductor to the ground rods and to the water..im just a little confused what to do in this situation
 
NolaTigaBait said:
nevermind...i read 250.32b theres an exception that allows the grounded conductor to be used for grounding
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Yes, as long as that 1" rigid you mentioned doesn't create a metallic path between the two structures. If it does then the pipe would be the EGC.

You must meet all 3 requirements of the Exception.

If that is not the case then you would need to bond the water and the can with the grounded conductor. And you would need a supplemental ground also.


And, yes, you would need two rods at the service unless the one rod is 25 ohms or less.


In my opinion.
 
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