Go Back   InterNACHI Inspection Forum > >

Notices

Electrical Inspections Contains discussions about electrical systems. This includes receptacles, panels, wiring, etc.

Reply
 
Thread Tools
  #1  
Old 7/31/18, 4:13 PM
Jenna Novic Jenna Novic is offline
Certified Professional Inspector (CPI) ®
 
Join Date: Feb 2018
Location: Atlanta GA
Posts: 19
Default 100amp panel grounding question

Hello all. I am a greenhorn and have just finished my 7th mock inspection. Need some grounding help. 1930s bungalow last tag on the panel is 1990. 50% of the outlets in the house are ungrounded the rest are. Last month someone stole all of the copper plumbing including the refrigerant lines. There was a ground clamp hanging from a stranded neutral wire that Iím guessing was the panelís ground. Tell me Iím wrong or at least tell me the panel appears to be ungrounded...
Attached Thumbnails
100amp panel grounding question-6e89d7e5-6aa9-4312-8664-18d630c50e1b-jpg   100amp panel grounding question-efbae333-62cd-4ac9-9922-9f640c4fee39-jpg  
Reply With Quote
Need a home inspection in Missouri? Check out InterNACHI's listing of Missouri certified home inspectors. Or, find a home inspector anywhere in the world with our inspection search engine.
  #2  
Old 7/31/18, 4:33 PM
Robert Meier's Avatar
Robert Meier Robert Meier is online now
Active Poster
 
Join Date: Feb 2010
Location: New Jersey
Posts: 3,207
Please Note: Robert Meier is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: 100amp panel grounding question

That stranded conductor in the flexible raceway is a grounding electrode conductor (GEC) not a neutral (could also be a bonding jumper). Is there a main bonding jumper in the neutral bar connecting to the panel enclosure, I can't tell form the photo. Was the GEC connected at the point where the original metal water piping enters the building? otherwise it may have just been a bond for the metal water piping.
Reply With Quote
  #3  
Old 7/31/18, 10:40 PM
Jenna Novic Jenna Novic is offline
Certified Professional Inspector (CPI) ®
 
Join Date: Feb 2018
Location: Atlanta GA
Posts: 19
Default Re: 100amp panel grounding question

Ah...that hadn't occurred to me Robert. It probably is a bonding jumper, and yes the copper was running very close. There is no bonding jumper coming off of the neutral bar.
Reply With Quote
  #4  
Old 8/1/18, 4:37 AM
Robert Meier's Avatar
Robert Meier Robert Meier is online now
Active Poster
 
Join Date: Feb 2010
Location: New Jersey
Posts: 3,207
Please Note: Robert Meier is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: 100amp panel grounding question

If you look at the label within the panel there is a place on the neutral bar for a bonding screw. Cannot tell from the photo if it's actually there.
Reply With Quote
  #5  
Old 8/1/18, 9:12 AM
Jenna Novic Jenna Novic is offline
Certified Professional Inspector (CPI) ®
 
Join Date: Feb 2018
Location: Atlanta GA
Posts: 19
Default Re: 100amp panel grounding question

You're right, it's there. The neutral bar is bonded to the cabinet. So the GEC to the non existent water piping could have been an appropriate ground path from the main panel? Bonding and grounding are somewhat confusing to me at this stage. Thanks for the help
Reply With Quote
  #6  
Old 8/1/18, 9:16 AM
Roy Lewis, CMI's Avatar
Roy Lewis, CMI Roy Lewis, CMI is online now
Certified Master Inspector ®
 
Join Date: Nov 2012
Location: North Florida
Posts: 12,791
Default Re: 100amp panel grounding question

This looks better.....
Attached Thumbnails
100amp panel grounding question-nachi-jpg   100amp panel grounding question-nachi2-jpg  




InterNACHI Lifetime Member.
www.1stproinspection.com
roy@1stproinspection.com
Serving Gainesville Florida and surrounding areas.
Florida Certified Contractor #CRC1328001
Florida Certified Home Inspector #HI7019
Deus solus me iudicare potest
#1st Pro Inspection
Reply With Quote
  #7  
Old 8/1/18, 9:21 AM
Jenna Novic Jenna Novic is offline
Certified Professional Inspector (CPI) ®
 
Join Date: Feb 2018
Location: Atlanta GA
Posts: 19
Default Re: 100amp panel grounding question

Yes, yes it does...thanks Roy! I guess my report should state that there was no grounding present for the panel.

Last edited by jnovic; 8/1/18 at 9:56 AM..
Reply With Quote
  #8  
Old 8/1/18, 10:18 AM
Robert Meier's Avatar
Robert Meier Robert Meier is online now
Active Poster
 
Join Date: Feb 2010
Location: New Jersey
Posts: 3,207
Please Note: Robert Meier is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: 100amp panel grounding question

Quote:
Originally Posted by jnovic View Post
I guess my report should state that there was no grounding present for the panel.
Just for reference "no grounding" is very vague and sounds as if the system is completely ungrounded which is it not.
Reply With Quote
  #9  
Old 8/1/18, 2:46 PM
Marc A. Goldenberg's Avatar
Marc A. Goldenberg Marc A. Goldenberg is offline
Certified Professional Inspector (CPI) ®
 
Join Date: Feb 2004
Location: Boca Raton, FL
Posts: 6,362
Default Re: 100amp panel grounding question

Quote:
Originally Posted by jnovic View Post
You're right, it's there. The neutral bar is bonded to the cabinet. So the GEC to the non existent water piping could have been an appropriate ground path from the main panel? Bonding and grounding are somewhat confusing to me at this stage. Thanks for the help
Grounding and Bonding ó Are we on the same page?




http://www.alltropic.com


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Awards Committee Member
SUBMIT YOUR AWARD NOMINATIONS HERE

The InterNACHI Awards Committee is the final
authority of issuance of any award the committee offers.
Reply With Quote
Reply

Thread Tools

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


All times are GMT -4. The time now is 2:19 AM.
no new posts