Electrical classification class 1 div 1
Electrical classification class 1 div 1
(OP)
Is there a way to change classifications by adding air flow?
We have a new Kiln dryer for concrete going in. The unit itself is located in a 40' container with louvers on the doors. The burner itself is fed by natural gas. There aren't fans feeding air into the container so its just the air coming in from the louvers. Is this considered a class 1 div 1 area? Is there a way to change the class by adding a certain amount of airflow through the container? There is a burner gas valve and burner controls. I have attached a few drawings.
We have a new Kiln dryer for concrete going in. The unit itself is located in a 40' container with louvers on the doors. The burner itself is fed by natural gas. There aren't fans feeding air into the container so its just the air coming in from the louvers. Is this considered a class 1 div 1 area? Is there a way to change the class by adding a certain amount of airflow through the container? There is a burner gas valve and burner controls. I have attached a few drawings.





RE: Electrical classification class 1 div 1
This would probably NOT be a considered a hazardous space. The inside of an oven is not usually "Divisioned." There is not supposed to be flammable mixtures floating about when humans or ignition sources are present. Nor should there be any normal or abnormal cases where flammable mixes should be present.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Electrical classification class 1 div 1
RE: Electrical classification class 1 div 1
You are still looking at something that is similar to a furnace. There is not supposed to be fuel in the air around it any more than the unit in your attic heating your home.
Not actually laying eye's on your unit I can't absolutely comment, but if it's as I expect it to be, I would provide ventilation slats in the enclosure,(as exist, and call it a day.
If you're really worried about it, add a flammable gas detector and gate the system enable thru it.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Electrical classification class 1 div 1
That helps
RE: Electrical classification class 1 div 1
From NFPA 58-2006, National Fuel Gas Code:
As noted above, adequate ventilation can indeed make the difference. What adequate ventilationis is currently going through a debate. Various organizations have differing views; but, in my opinion, the most practical definition in common usage is:It has stood the test of time for the last 30 years +.
RE: Electrical classification class 1 div 1
Roy