For a second I will say these are just a non-flammable gas tank (to avoid any classified location questions). I would ask "are these tanks fixed in place"? If they are portable the extension cord may be OK, then we have to start looking at article 500 and see what kind of gas is involved.
[This message has been edited by gfretwell (edited 09-04-2006).]
Re: Question #48#99753 09/05/0604:24 AM09/05/0604:24 AM
48. We see a few liquid gas storage tanks that hold about 500 gallons of gas and have an electric pump mounted on the top. Inquiring minds want to know how this pump is to be wired. This is usually considered a temporary installation and sometimes is relocated to a new site. The pump has a 6-foot cord on it and will occasionally be plugged into an existing outlet via an extension cord.
I have no idea, classified locations is a section of the NEC that I am extremely weak in.
It will be interesting to see what the answers are. To me it seems we do not have enough info.
I would think we would need to know the product in the tanks.
Bob Badger Construction & Maintenance Electrician Massachusetts
Re: Question #48#99754 09/05/0611:08 AM09/05/0611:08 AM
George, I see these occasionally for diesel fuel, not gasoline. They are usually put under an open shed, i.e. no walls. The illustration in Art. 514 shows the area 20 feet around and 18 inches above grade as Class I Div. 2. Pits and depressions are Class I Div. 1. I would judge that the portable cord is acceptable IF it is plugged in above or horizontal to the pump. That would keep it out of the classified area. I would have a problem with the use of an extension cord to supply the equipment since it could easily be moved into the classified area. Does that help ? Alan--
The question had to do with a "temporary" installation and the product was liquid gas in a tank monted on a skid or pallet. The gas was used for High Lows and trucks during the Rider Cup here in Michigan. This question has come up for other sites as well. The tank was moved around via the skid/pallet by a High Low.
[This message has been edited by George Little (edited 09-05-2006).]
George, I'm just a dumb hick in Indiana, please tell me what is the Rider Cup, and what is a high low. If a high low is a fork lift and the tank can be elevated then why don't they use gravity instead of electricty to transfer fuel ? Alan-- Thanks for the site for the questions. It puts me ahead for when I get to the meeting.
[This message has been edited by Alan Nadon (edited 09-06-2006).]
Hey "DUMB HICK ALAN FROM INDIANA" Sorry for the slang exoression of Hi Lo but yes I did mean fork lift. As for the "Rider Cup" that is an intenational golfing event held every 2 years in a different country. two years ago it was in Bloomfield Hills Michigan where I was asked to come out of retirement and inspect this event and the set ups. They had 172 generators and huge exibits and media tents. One media tent had 300 tons of Air Conditioning running of generators. Quite a experience for this inspector. It was a 6 months job plus I got to witness the event- Tiger Woods and all.