fuel tank grounding - Electrician Talk - Professional Electrical Contractors Forum
CLICK HERE AND JOIN OUR COMMUNITY TODAY, IT'S FREE!
Go Back   Electrician Talk - Professional Electrical Contractors Forum > Electrical Trade Topics > NEC Code Forum

Reply
 
Thread Tools Display Modes
Old 04-28-2012, 11:45 PM   #1
Junior Member
 
Join Date: May 2011
Location: belin New Mexico
Posts: 15
Rewards Points: 10
Default fuel tank grounding

The fuel tank: good size outdoor tank... its going to hold diesel and it will pump it to some other location to be utilized.

Power: 480 form a pannel in the building will feed a pannel on the tank. From there it hits a xformer and the load side hits another pannel to branch off for many of the controls and pumps.

The problem: we are required to place two grounding plates caddy corner to each other... we were going to bond it to the building counterpoise, but one of the labies said that code changes in the nec require a separately derived ground (2 ground rods 6 feet apart) for fuel tanks

The question: do you have to have a separately derived ground for ground on fuel tank

In my opinion: either way the ground rods would have to be tied in to the building counterpoise and building ground to prevent a differance in potential
thegr81 is offline   Reply With Quote
Join Contractor Talk

Join the #1 Electrician Forum Today - It's Totally Free!

ElectricianTalk.com - Are you a Professional Electrical Contractor? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's the leading place for electricians to meet online. No homeowners asking DIY questions. Just fellow tradesmen who enjoy talking about their business, their trade, and anything else that comes up. No matter what your specialty is you'll find that ElectricianTalk.com is a great community to join. Best of all it's totally free!

Join ElectricianTalk.com - Click Here JOIN FOR FREE


Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ElectricianTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

Old 04-29-2012, 06:36 AM   #2
BBQ
Salty Member
 
BBQ's Avatar
 
Join Date: Nov 2010
Location: New England
Posts: 31,029
Default

The NEC requires any seperate structure that is supplied with a feeder, or more than one branch circuit to have a grounding electrode system installed.

If you use rods, plates or a ring is a design issue.
BBQ is offline   Reply With Quote
Old 04-29-2012, 10:45 PM   #3
Junior Member
 
Join Date: May 2011
Location: belin New Mexico
Posts: 15
Rewards Points: 10
Default

Code section?
thegr81 is offline   Reply With Quote
Old 04-30-2012, 08:19 AM   #4
Senior Member
 
Join Date: Jul 2010
Location: IL
Posts: 2,531
Rewards Points: 1,114
Default

Quote:
Originally Posted by thegr81 View Post
code section?
250.32
don_resqcapt19 is offline   Reply With Quote
Old 04-30-2012, 08:31 AM   #5
Senior Member
 
Join Date: Jan 2007
Location: Wilmington, NC
Posts: 8,500
Rewards Points: 7,404
Default

Years ago (1990's) I read an NFPA publication (sorry, I can't remember which one) that required AST's (Aboveground Storage Tank) to have a ground rod driven on opposite corners and have the tank grounded to the ground rods. I believe it was strictly for lightning strike dissipation, and not a separately derived grounding system for the electrical circuitry, but I do see where the grounds need to be at the same potential.

I never ran into any local inspection authority that was aware of this recommendation and I never ran into enforcement except on jobs that came through an engineering department that was aware of it.

Also, there is a publication (PEI RP-200) that might address this.
__________________
In search of unbiased truth.
hardworkingstiff is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
propane tank wiring Steve W General Electrical Discussion 3 08-17-2011 01:46 PM
Diesel Tank oldschoolvdub NEC Code Forum 15 06-02-2011 01:30 AM
Conduits and Propane Tank aec123 NEC Code Forum 1 04-26-2011 10:54 AM
Pump & Tank cobra50 Business, Marketing, and Sales 8 10-09-2010 07:33 PM
Motor fuel tank-agriculture NYXLAR NEC Code Forum 0 07-29-2010 12:04 AM


All times are GMT -4. The time now is 05:16 AM.


Our Pro Sites Network
ContractorTalk.com | DrywallTalk.com | HVACSite.com | PaintTalk.com | PlumbingZone.com | RoofingTalk.com