1.1 The purpose of this specification is to provide details of an enclosure that protects internal equipment from rain, dust, vandalism and other conditions found in an outdoor or otherwise harsh environment.
1.2 The manufacturer must be able, upon request, to produce part numbers on all components for repair purposes. Certificates of compliance may be requested on each cabinet or on any component or part thereof.
the requirements of a NEMA rating 4X and shall be UL listed.
2.1 The enclosure(s) will meet or exceed
3.0 CABINET CONSTRUCTION
3.1.1 The cabinet and door shall be constructed from 5052-H32 sheet aluminum alloy. The thickness of the alloy shall be 0.080 for all enclosures less than 36” in height. Alloy with a thickness of 0.125” shall be used when the enclosure equals or exceeds 36” in height. Alternate material is type 304 stainless steel; minimum thickness is 0.75 (14 gauge). External welds shall be made by using the Heliarc welding method; whereas, internal welds will be made by the wire welding method. All welds shall be neatly formed and free of cracks, blow holes and other irregularities.
3.1.2 All inside and outside edges of the cabinet shall be free of burrs.
3.1.3 All exterior welds and seams will be continuously welded and ground smooth.
3.1.4 The door opening shall be double flanged on all four (4) sides, which increases strength around openings and keeps dirt and liquids from entering the enclosure when door is opened.
3.2.1 The door opening will be a minimum of 80% of the front surface area and shall be hinged on the same side when facing the cabinet.
A. The doors shall be furnished with a gasket that satisfies the physical properties as found in UL508 table 21.1 and shall form a weather tight seal between the cabinet and door.
3.2.2 The hinges shall be continuous. Enclosures less than 36 inches tall shall have the hinges spot-welded to both door and cabinet.enclosures equal to or greater than 36 inchesin height shall have hinges spot-welded to theCabinet and bolted to the door.
A. Enclosures made from 0.080 aluminumwill use hinges made from like materialand use 0.187 inch hinge pins made from
B. Enclosures less than 36 inches in height and made form 0.075 stainless steel usehinges made from like material and use 0.187 inch hinge pins made from stainless steel.
C. Stainless steel enclosures equal to or greater than 36 inches in height use hinges made from 0.075 inch stainless steel with a .250 inch stainless steel hinge pin.
D. Aluminum enclosures equal to or greater than36 inches in height use hinges made from 0.090 inch thick aluminum with a 0.250 inch stainless steel hinge pin.
3.2.3 Latching will be quarter turn, screwdriver operated on enclosures smaller than 36 inches in height. Locking will be by padlock hasp. On enclosures 36 inches or larger, the latching mechanism shall be a 3-point draw roller type.
A. Pushrods will be turned edgewise at the outward supports and shall be 0.250 inch by 0.750 inch aluminum,
B.Rollers shall have a minimum diameter of 0.875 inch and will be made of nylon. The center catch shall be fabricated
from 0.187 inch aluminum, minimum.
3.2.4 An operating handle shall be furnished (3-point latch models only).
A. The handle will be stainless steel with a 3/4 inch diameter shank.
B. The latching handle shall have a provision for padlocking in the closed position.
4.0 EQUIPMENT MOUNTING
4.1 Collar studs will be provided on the rear wall for mounting of optional equipment panels.
5.0 CABINET FINISH
5.1 Unless otherwise specified, the outside surface of the cabinet shall have a smooth, uniform, natural aluminum finish.
5.2 If painted, the following steps shall be taken as a minimum requirement.
5.2.1 The cabinet door and any other parts to be painted will be treated with an iron phosphate coating conversion technique.
5.2.2 After phosphatizing, the parts shall be baked to eliminate any moisture in seams.
5.2.3 The finish coat of a Polyester Powder will be baked at 400-450 degrees F for ten (10) minutes.
5.2.4 The finish shall be commercially smooth, substantially free of flow lines, paint washout, streaks, blisters and other defects that would impair serviceability or detract from general appearance.
6.0 CABINET MOUNTING
6.1 WALL MOUNTED ENCLOSURE
6.1.1 Enclosures shall have mounting feet welded to top and bottom of rear wall (exterior).
7.0 APPROVED MANUFACTURER
7.1 Cabinet is to be manufactured by APX Enclosures, lnc. or an approved UL listed equivalent.