Grounding for new main panel

Reply

  #1  
Old 11-02-06, 10:30 PM
Member
Thread Starter
Join Date: Nov 2006
Location: USA
Posts: 62
Grounding for new main panel

Hi:

Going to do a major remodel, and have to move the current meter head and main disconnect (have interior main panel).

Question is re grounding the new disconnect and meter head panel. Are BOTH a ground rod and connection to a water pipe required (or only one means)?

Can a ground rod be set (before foundation pour) so that it is inside the wall cavity instead of looking ugly on the outside of the structure.

With my setup, any required run to a cold water pipe is gonna be almost 50 feet (doesn't seem realistic).

Comments and suggestions greatly accepted.

Thanks,
 
Sponsored Links
  #2  
Old 11-02-06, 11:36 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,541
> Are BOTH a ground rod and connection to a water
> pipe required (or only one means)?

Both are required.

> Can a ground rod be set (before foundation pour) so that
> it is inside the wall cavity instead of looking ugly on the
> outside of the structure.

Not exactly, but you can have the foundation contractor bend a stub of rebar out of the foundation near the new location of the main panel. You can connect this rebar to the main panel using a clamp and #4 copper wire and use it as the grounding electrode; it's called a UFER ground and can be used instead of a copper rod.

> With my setup, any required run to a cold water pipe
> is gonna be almost 50 feet (doesn't seem realistic).

It still must be done; the cold water pipe electrode is not optional. You must clamp the GEC conductor to the cold water pipe within 5' of the water pipe entrance to the building (not just any old place on a cold water pipe). It also must "jump the meter" and be clamped to both the street side and the house side of the pipe if your water meter is located inside the building.
 
  #3  
Old 11-03-06, 05:23 AM
Member
Join Date: Sep 2003
Location: Central New York State
Posts: 13,973
If the water pipe entering your house is metallic and extends far enough into the ground then it is your main grounding electrode. In this case the connection must be made close to where the pipe enters the house. You then need a second grounding method.

If the water pipe entering your house is non-metallic but your house pipes are metallic, then the pipes must be bonded to the electrical system ground.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes