Xylem Wastewater (Technical Manual) - Manual (Page 13)

PAGE 13
Wastewater
Goulds Water Technology, Bell & Gossett,
Red Jacket Water Products, CentriPro
NEMA CONTROL PANEL ENCLOSURES
Enclosure Rating Explanation
NEMA 1 ① To prevent accidental contact with enclosed apparatus. Suitable for application indoors
General Purpose where not exposed to unusual service conditions.
NEMA 2 To prevent accidental contact, and in addition, to exclude falling moisture or dirt.
Driptight
NEMA 3 ①
Protection against specified weather hazards. Suitable for use outdoors.
Weatherproof
(Weatherproof Resistant)
NEMA 3R ①
Protects against entrance of water from a beating rain. Suitable for general outdoor
Raintight application not requiring sleetproof.
NEMA 4 ① Designed to exclude water applied in form of hose stream. To protect against stream of
Watertight water during cleaning operations, etc.
NEMA 4X ① Designed to exclude water applied in form of hose stream. To protect against stream of
Watertight & Corrosion Resistant water during cleaning operations, etc. Corrosion Resistant.
NEMA 5 Constructed so that dust will not enter enclosed case. Being replaced in some
Dust Tight equipment by NEMA 12.
NEMA 6 Intended to permit enclosed apparatus to be operated successfully when submerged
Submersible in water under specified pressure and time.
NEMA 7 Designed to meet application requirements of National Electrical Code for Class 1,
Hazardous Locations Hazardous Locations (explosive atmospheres). Circuit interruption occurs in air.
Class I – Air Break
NEMA 8
Identical to NEMA 7 above, except the apparatus is immersed in oil.
Hazardous Locations
A, B, C or D
Class II – Oil Immersed
NEMA 9
Designed to meet application requirements of National Electrical Code for Class II
Hazardous Locations Hazardous Locations (combustible dusts, etc.).
E, F or G
Class II
NEMA 10
Meets requirements of U.S. Bureau of Mines. Suitable for use in coal mines.
Bureau of Mines
Permissible
NEMA 11
Provides oil immersion of apparatus such that it is suitable for application where
Dripproof equipment is subject to acid or other corrosive fumes.
Corrosion Resistant
NEMA 12
For use in those industries where it is desired to exclude dust, lint, fibers and flyings, or
Driptight, Dusttight oil or Industrial coolant seepage.
Electrical Data