I agree with kwired, the point of entrance mentioned in 250.52(A)(1) is referring to the point at which the water pipe enters the building.
Chris
I wonder how many here on the forum agree that if you are using the water service as a grounding electrode you don't have to do anything else to bond your interior metal water pipe???
I wonder how many here on the forum agree that if you are using the water service as a grounding electrode you don't have to do anything else to bond your interior metal water pipe???
I wonder how many here on the forum agree that if you are using the water service as a grounding electrode you don't have to do anything else to bond your interior metal water pipe???
The 5' refers to the water service. Your water service enters the building somewhere. 5' after that, it is no longer a grounding electrode. That means that you cannot make your grounding electrode connection further than 5' from where the water service enters the building.
I wonder how many here on the forum agree that if you are using the water service as a grounding electrode you don't have to do anything else to bond your interior metal water pipe???
I've never felt comfortable using the water pipe as an electrode for many reasons but the code says we can use it(personal opinion).
I've never felt comfortable using the water pipe as an electrode for many reasons but the code says we can use it(personal opinion).
I do not agree.
The code does not say we can use it, it says we MUST use it if it is present. (See 250.50)
Chris
I gotcha, and u r rite, and on top of that you have to supplement that pipe with an electrode 250.53(d)(2).
Correct.
Chris
but if i use ground rods , is 2 ground rods max to supplement the under grd water pipe(250.56)?
I am with jxofaltrds on that. Bonding the hot water system to the cold, bonding around water softeners, meters, water tanks, etc. is needed to meet 250.104(A).
Yes, if you use a ground rod to supplement the water pipe electrode the ground rod must meet the 25 ohm rule or it must be augmented by an additional electrode in accordance with 250.56.
Chris
250.56 does not require a 2nd ground rod, if the waterline IS an electrode.
It is an electrode under 250.53(D)(2).
I know that you are going to say that 250.56 requires a second ground rod but it does not.
250.56 'may' (25 ohms or less) take you back to 250.52(A)(4) though (8).
250.52(A)(6) can apply to the waterline, see listed in article 100, so it is the additional electrode.
I know, but it is clear that the hot must be bonded, I don't know that anyone is arguing that, it is the method that is in dispute, as I remember. Some count on the plumbing fixtures for the bonding. Some claim that there is only one water piping system in a building, so only one bond is needed. The NEC is not concerned with the division of water piping systems, if it is metal, it is to be bonded with jumper(s) sized in accordance with 250.66. Not a faucet assembly.Be careful I got bashed on the hot/cold bond.
I know that this is how we do it in central Ohio but many here disagree.
250.56 does not require a 2nd ground rod, if the waterline IS an electrode.
It is an electrode under 250.53(D)(2).
I know that you are going to say that 250.56 requires a second ground rod but it does not.
250.56 'may' (25 ohms or less) take you back to 250.52(A)(4) though (8).
250.52(A)(6) can apply to the waterline, see listed in article 100, so it is the additional electrode.