Is my house adequately grounded, and what does that mean?

[infinity]

Do you think about:

(B) Electrode Spacing. Where more than one of the electrodes
of the type specified in 250.52(A)(5) or (A)(7) are
used, each electrode of one grounding system (including
that used for strike termination devices) shall not be less
than 1.83 m (6 ft) from any other electrode of another
grounding system. Two or more grounding electrodes that
are bonded together shall be considered a single grounding
electrode system.

Also.
How do I do this with a city water supply using copper?

Not sure what you're getting at with the 6' reference. That reference is for two different grounding systems.

 

[jxofaltrds]

Not sure what you're getting at with the 6' reference. That reference is for two different grounding systems.

This is not clear to me. Two grounds rods must be 6' apart. Correct? I say yes.

Other electrodes are allowed to within 6' of each other. Correct? I say no.

Am I reading this wrong?

 

[infinity]

This is not clear to me. Two grounds rods must be 6' apart. Correct? I say yes.

Other electrodes are allowed to within 6' of each other. Correct? I say no.

Am I reading this wrong?

That's the way I read it. Two electrodes from different systems (think lightning system) would require 6' electrode spacing. A CEE can be right next to the water pipe and be compliant and it usually is within a foot or so.

 

[Hv&Lv]

That's the way I read it. Two electrodes from different systems (think lightning system) would require 6' electrode spacing. A CEE can be right next to the water pipe and be compliant and it usually is within a foot or so.

That is the way I read it also.
One thing to note though. If a CEE is used, the water pipe wouldn't be used as an electrode, it would be bonded, and not be subject to 250.53(B). (IMO)

 

[Smart $]

That is the way I read it also.
One thing to note though. If a CEE is used, the water pipe wouldn't be used as an electrode, it would be bonded, and not be subject to 250.53(B). (IMO)

If the [metal] water pipe meets the criteria, it must be used as an electrode. The presence of a CEE makes no difference.

 

[Hv&Lv]

If the [metal] water pipe meets the criteria, it must be used as an electrode. The presence of a CEE makes no difference.

Must be?
With a CEE, I would think the water pipe becomes the property of 250.104, although I can't see why it wouldn't be used anyway.

 

[Smart $]

Must be?
With a CEE, I would think the water pipe becomes the property of 250.104, although I can't see why it wouldn't be used anyway.

Yes, must be...

250.50 Grounding Electrode System. All grounding electrodes
as described in 250.52(A)(1) through (A)(7) that are
present at each building or structure served shall be bonded
together to form the grounding electrode system.

A qualifying water pipe is a 250.52(A)(1) electrode.

 

[Hv&Lv]

Yes, must be...



A qualifying water pipe is a 250.52(A)(1) electrode.

Fair enough. I haven't ever not used one, just looking for clarification. I was going over the spacing of (A)(5) and (A)(7)...