Grounding conductor to a convenient water pipe?

[tonype]

Grounding conductor from the main panel connected to a water pipe that was close to the panel (also has a bonding jumper to a hot water pipe). I always thought that this conductor connection should be by the water service pipe as it enters the building. There is also another bonding jumper across the water meter.

Does this meet acceptable practices?

 

[mikeames]

The connection has to be made within 5 feet of point of entrance. 250.68 C

Connections cant be dependent on water meters or filters etc.. which with a jumper would not be. You could technically connect after the meter within 5 feet but better not to if you can.

 

[mikeames]

Also the size of the GEC there does not need to be larger than 6AWG. 250.66 A

 

[dkidd]

It needs to be sized as indicated in Table 205.66.

 

[mikeames]

It needs to be sized as indicated in Table 205.66.

Can you site the article and section that states that? Are you looking at 250.68? That only pertains when supplied by feeder or BC.

 

[dkidd]

Table 250.66. Got dyslexic.

 

[mikeames]

Table 250.66. Got dyslexic.

The OPs situation does not need to be sized to the table.
250.66 A

 

[dkidd]

250.104 Bonding of Piping Systems and Exposed Structural
Metal.
(A) Metal Water Piping. The metal water piping system
shall be bonded as required in (A)(1), (A)(2), or (A)(3) of
this section. The bonding jumper(s) shall be installed in
accordance with 250.64(A), (B), and (E). The points of
attachment of the bonding jumper(s) shall be accessible.
(1) General. Metal water piping system(s) installed in or
attached to a building or structure shall be bonded to the
service equipment enclosure, the grounded conductor at the
service, the grounding electrode conductor where of sufficient
size, or to the one or more grounding electrodes used.
The bonding jumper(s) shall be sized in accordance with
Table 250.66 except as permitted in 250.104(A)(2) and
(A)(3).

 

[infinity]

First we need to know if this is a grounding electrode conductor for a water pipe electrode and then the size of the SEC's. I agree with dkidd 250.66.

 

[mikeames]

Ok, I guess I am wrong straighten me out. Assume this is a grounding electrode conductor. Then 250.66 A applies, but because this is also a water pipe system this then brings in 250.104 which is the BONDING conductor and because the water pipe is also the electrode then the bonding jumper to the panel is sized to 250.66. If this was just a a pipe electrode separate from the water, then 250.104 would not apply. Assuming its a 200A service its a #4 instead of a #6.

 

[augie47]

It actually makes no difference in sizing.
IF the water pipe is a grounding electrode then 250.66 applies.
IF you are just bonding interior piping the 250.104(A) applies which references 250.102 which will be the same until your phase conductors exceed 1100 kcmil.
Only difference is the point of connection.

 

[tom baker]

It actually makes no difference in sizing.
IF the water pipe is a grounding electrode then 250.66 applies.
IF you are just bonding interior piping the 250.104(A) applies which references 250.102 which will be the same until your phase conductors exceed 1100 kcmil.
Only difference is the point of connection.

If you are making a connection to a water pipe that qualifies as a GEC, then that connection has to be done within 5 ft of the point of entry of the water pipe.
If you are making a bonding connection per 250.104, it can be done at any accessible location. If done in a wall a 2 gang mud ring is used for a blank cover plate

 

[readydave8]

If you are making a connection to a water pipe that qualifies as a GEC, then that connection has to be done within 5 ft of the point of entry of the water pipe.

Do I remember correctly that it didn't used to be "within 5'" and that this requirement was added early this century or late previous century?

 

[don_resqcapt19]

Do I remember correctly that it didn't used to be "within 5'" and that this requirement was added early this century or late previous century?

I think it was the 96 or the 99 code, but not sure and too lazy to dig my old books out to check.

 

[Greentagger]

Doesn’t look like those clamps are being used as listed. Appears lugs have been added and it appears clamps have a hole in them where the conductor is to be terminated.?