LarryHatcher
New member
if you do not have a cold water ground how is the service to be grounded?
I recently did a building with all-plastic plumbing, except for the sprinkler supply, which we are specifically not permitted to bond to.LarryHatcher said:if you do not have a cold water ground how is the service to be grounded?
LarryFine said:I did, however, make the service neutrals larger than calcs required.
LarryFine said:I recently did a building with all-plastic plumbing, except for the sprinkler supply, which we are specifically not permitted to bond to.
The only grounding electrodes were the two driven rods. I did, however, make the service neutrals larger than calcs required.
I understand the question, and I'll give you my answer, right or wrong. I didn't do it for profit, but more as what I call the 'performance' of the electrical system. This is a mixed-use service, a single drop supplied from a high-leg open Delta. The services supplied are:iwire said:What does one have to do with the other?
Very much existing. All brick, probably 100 years old, completely gutted.infinity said:Why wouldn't this building have a CEE or was it existing?
I still don't understand. I don't see any connection between the size of the grounded conductor and the type of grounding electrodes.Since driven grounds are among the weakest types of electrodes, and there is no metallic water piping, which is probably the best electrode in an all-metal water system (neighborhood, not just one building), I just felt enlarging the service neutrals was beneficial.
I know, I know. There is no direct connection between the two. The neutral need not be larger than the otherwise-required (i.e., other than the driven rods' #6) GEC if the calcs don't require it to be. This was a performance-based choice, not a compliance-based one.don_resqcapt19 said:I still don't understand. I don't see any connection between the size of the grounded conductor and the type of grounding electrodes.
LarryFine said:This was a performance-based choice, not a compliance-based one.
roger said:I agree George, and possibly for additive harmonics.
Roger
Why do you feel additional rods are needed?COTInspector said:Service changes on existing houses, only 2 ground rods are required (I disagree I feel additional are needed, given the soil conditions in Florida).
We can and have requested Engineer certified 3rd party "Meg" test reports on GES's suspect less than the required 25 ohms.
Suggest or require? In writing?Here in the City of Tampa we suggest 2 ground rods and a concrete encased electrode for new construction.
don_resqcapt19 said:Larry,
I still don't understand. I don't see any connection between the size of the grounded conductor and the type of grounding electrodes.
Don
LarryHatcher said:if you do not have a cold water ground how is the service to be grounded?
That's what I had in mind. Not keeping the service neutral at ground, but closer to the utility neutral.georgestolz said:. . . I wouldn't be thinking about the earth when upsizing the neutral - I'd be doing it for a better short circuit and ground fault clearing path, to make breakers kick sooner.