Originally Posted By: mthomas2
This post was automatically imported from our archived forum.
http://www.nachi.org/bbsystem/usrimages/S/SystemGround.jpg ]
[ Image: http://www.nachi.org/bbsystem/usrimages/B/BulldogPushmantic.jpg ]
http://www.nachi.org/bbsystem/usrimages/S/SystemGround.jpg ]
[ Image: http://www.nachi.org/bbsystem/usrimages/B/BulldogPushmantic.jpg ]
Originally Posted By: dvalley
This post was automatically imported from our archived forum.
Michael,
Your arrow is pointing to the SE cable. The grounding cable appears to be the yellow #8 cable on top.
It appears that the copper strap (which is grounded to the water supply pipe) is a good connection, if that pipe is exiting the foundation through that wall. If not, the ground connection needs to be as close as possible to the portion of pipe that exits the building.
It's an old connection, but good. And so are the Pushmatics. They are ancient and expensive to replace. I always advise my clients to consider upgrading to circuit breakers in the near future, when I find Pushmatics.
You've got double taps on the main SE also. (At the arrow you've added, where the blue and black cables meet)
--
David Valley
MAB Member
Massachusetts Certified Home Inspections
http://www.masscertified.com
"Some cause happiness wherever they go; others, whenever they go."
Originally Posted By: Thomas Ogryski
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The 1999 NEC introduced the requirement for the connection to the water pipe (if being used as a grounding electrode) to be within five feet of the point of entry. I’d say the panel in question predates that requirement by quite a bit.
As for the main bonding jumper, you might try looking at the labels in the panel or on the cover. This panel may be old enough to predate the requirement to show this information.
I don't believe I have ever seen a grounding electrode connection like the one in your picture.
Also, where is the service disconnecting means? I may be mistaken, but I don't believe that this breaker box was listed for use as service entrance equipment (which could explain the lack of an obvious main bonding jumper). I see a lot of these Pushmatic load centers here in the Mountain State and almost all of them are lacking the required service disconnecting means.
Tom
Originally Posted By: mthomas2
This post was automatically imported from our archived forum.
http://www.nachi.org/bbsystem/usrimages/P/PanelGroundDetailSmall.jpg ]
Can this strap, by itself, act a sufficient GEC?
Originally Posted By: dvalley
This post was automatically imported from our archived forum.
Michael,
If that pipe is exiting the building at that point, it should be Ok, but I would still recommend an electrician evaluate/upgrade the grounding of this panel due to it's age.
--
David Valley
MAB Member
Massachusetts Certified Home Inspections
http://www.masscertified.com
"Some cause happiness wherever they go; others, whenever they go."