doug glasscock
Member
- Location
- Virginia
Does anyone have any information for grounding a water storage tank. The tank is a 200,000 gallon Ground Storage Tank for water. Looks like a cylinder on end. 28FT Diameter 55FT tall.
Ground Storage Tank for public water supply
- Thread starter doug glasscock
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bphgravity
Senior Member
- Location
- Florida
Re: Ground Storage Tank for public water supply
What reason would you have to "ground" the water tank?
What reason would you have to "ground" the water tank?
doug glasscock
Member
- Location
- Virginia
Re: Ground Storage Tank for public water supply
I have looked at 3 different tank designs, all of which have ground rods spaced 10FT apart making a circle around the base of the tank. All of the ground rods are connected by a 3/0 conductor making a ring. The ring is connected to the 100AMP 120/240VAC service entrance panelboard with 3/0 and the tank is connected to the ring with 3/0. I would like to know more about why this is done this particular way.
I have looked at 3 different tank designs, all of which have ground rods spaced 10FT apart making a circle around the base of the tank. All of the ground rods are connected by a 3/0 conductor making a ring. The ring is connected to the 100AMP 120/240VAC service entrance panelboard with 3/0 and the tank is connected to the ring with 3/0. I would like to know more about why this is done this particular way.
bphgravity
Senior Member
- Location
- Florida
Re: Ground Storage Tank for public water supply
It appears to be some sort-of attempt to provide lightning protection for the water tank, or possibly an unusual attempt to ground the electrical service.
It appears to be some sort-of attempt to provide lightning protection for the water tank, or possibly an unusual attempt to ground the electrical service.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Ground Storage Tank for public water supply
Because the civil engineer drives the bus on water tank installations.
I have worked on water sytems for 25 years, and am very familar with steel tank installations. Typically the tank wall will be bolted to the concrete foundation. That would, IMO "ground" the tank.
I suspect the grounding system is to divert lighting energy into the ground to avoid damage to the foundation. However lighting is high frequency and travels on the surface.
The standard used for fabrication of water tanks is from the American Water Works Association. I have the standard here and will see what it states.
Because the civil engineer drives the bus on water tank installations.
I have worked on water sytems for 25 years, and am very familar with steel tank installations. Typically the tank wall will be bolted to the concrete foundation. That would, IMO "ground" the tank.
I suspect the grounding system is to divert lighting energy into the ground to avoid damage to the foundation. However lighting is high frequency and travels on the surface.
The standard used for fabrication of water tanks is from the American Water Works Association. I have the standard here and will see what it states.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Ground Storage Tank for public water supply
I just checked AWWA manual of water supply practices M42, steel water storage tanks. It makes no reference to grounding or lightning protection.
What part of the country is this?
[ November 29, 2005, 02:09 PM: Message edited by: tom baker ]
I just checked AWWA manual of water supply practices M42, steel water storage tanks. It makes no reference to grounding or lightning protection.
What part of the country is this?
[ November 29, 2005, 02:09 PM: Message edited by: tom baker ]
doug glasscock
Member
- Location
- Virginia
Re: Ground Storage Tank for public water supply
Virginia
I just talked to a guy that installs water tanks in this area and has a ton of information/requirements depending on the county.
Virginia
I just talked to a guy that installs water tanks in this area and has a ton of information/requirements depending on the county.
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