Class I/ Raintight

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augie47

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Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
Is a Class 1 Div I or Div II enclosure also suitable as a Nema 3R ??
I have a Class Div II enclosure outside that appears to have water entry from rain.
 

boater bill

Senior Member
Location
Cape Coral, Fl.
NEMA type 9 for Class 2 div 1 or Nema 4 for Class 2 Div 2?

Neither should have moisture penetration.
I have seen enclosures outside that will draw moisture (humidity) in as they cool at night. An option would be to use a panel pressurization system that meets Class 2 Div 1 requirements and will also keep the enclosure from wicking in moisture.

Hope this helps
 
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jim dungar

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Staff member
Location
Wisconsin
Occupation
PE (Retired) - Power Systems
An enclosure that is rated as either NEMA 7 or 9 is not always rated NEMA 3R.

You must check with the enclosure manufacturer.
 
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