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Old 08-25-2017, 07:31 AM   #1
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Default Horizontal (ish) Panels

New job plans call for 4 inverters and 1 AC panel installed on a membrane rooftop. The mounting detailstates all enclosures with OCPD's shall be installed vertically unless it is unpractical to do so.

Anybody ran into this? Seems to me the only way to know it's ok is to call the AHJ and ask for a blessing.

Furthermore, anybody know of a code reference prohibiting mounting panels in this fashion? I think it's cheesy.

The mounting detail indicates the equipment will be installed with a 15-degree tilt but laying "flat" on elevated supports (ecomounts??)
NEC 240.33 Thanks

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Old 08-25-2017, 07:40 AM   #2
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Keep in mind 240.81 ...........

240.81 Indicating. Circuit breakers shall clearly indicate whether they are in the open "off" or closed "on" position. Where circuit breaker handles are operated vertically rather than rotationaly or horizontaly, the "up" position of the handle shall be the "on" position.
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