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Thanks for all the responses. This is how I have decided to proceed. Rather than have the monitoring system turn on the exhaust fan, the exhaust fan must be proven running (with the use of TWO differential pressure switches across fan) in order for the chargers to operate. I will continue to...

I am currently reviewing a new golf clubhouse which includes a golf cart storage area in the basement. These golf carts are battery powered, and thus undergo re-charging. I know that during the re-charging process, hydrogen gas if given off. The storage area is equipped with a hydrogen gas...

I am currently reviewing a new golf clubhouse which includes a golf cart storage area in the basement. These golf carts are battery powered, and thus undergo re-charging. I know that during the re-charging process, hydrogen gas if given off. The storage area is equipped with a hydrogen gas...

I am currently reviewing a new golf clubhouse which includes a golf cart storage area in the basement. These golf carts are battery powered, and thus undergo re-charging. I know that during the re-charging process, hydrogen gas if given off. The storage area is equipped with a hydrogen gas...

I am currently reviewing a new golf clubhouse which includes a golf cart storage area in the basement. These golf carts are battery powered, and thus undergo re-charging. I know that during the re-charging process, hydrogen gas if given off. The storage area is equipped with a hydrogen gas...

I am currently reviewing a new golf clubhouse which includes a golf cart storage area in the basement. These golf carts are battery powered, and thus undergo re-charging. I know that during the re-charging process, hydrogen gas if given off. The storage area is equipped with a hydrogen gas...

I am currently reviewing a design for a golf cart storage area underneath a golf clubhouse. It currently uses a hydrogen monitoring system that activates an exhaust fan when room concentration exceeds 1%, then shuts down charging system (via large contactors) when concentration exceeds 2% and...

I am currently reviewing an application in which there are five motors ranging between 40 HP to 75 HP, 1800 rpm, 575 VAC. Does anyone have any data on what type of efficiencies can be expected of these motors. They currently operate from half to full load on the basis of ampere draw. They are...