A project I am working on will have empty underground metal storage tanks to capture SFFF fire suppression chemicals in the event the system activates. Does the tank need to be grounded? I have seen situations where a ground ring is installed and the metal tank bonded to this ring. I believe this is not required but would like to get some thoughts.
Underground Steel Tank Grounding
- Thread starter pete25
- Start date
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Not by the NEC.
Maybe look at catholic protection requirements
Maybe look at catholic protection requirements
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
Would these need to be blessed by the Pope?
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Consulting Electrical Engineer - Photovoltaic Systems
Is the metal of the buried tanks in contact with the earth? If so, it seems to me that they would already be more effectively grounded than anything that could be done with rods or a ring.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
I was going to say the same thing. But you know someone is going to want to drive 2 ground rods to "ground" the tank
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
I would probably want to bond it to the existing GES. What a great grounding electrode unused.I was going to say the same thing. But you know someone is going to want to drive 2 ground rods to "ground" the tank
zbang
Senior Member
- Location
- Roughly 5346 miles from Earls Court
Might not be such a good electrode if the exterior is coated or painted. 'course lightning won't care about that, but the AHJ might.