listed. Power source for dc power supply unit shall be from panelboards
that are fed from emergency generator.
2.8.2
Multiple Power Supplies
Where low voltage dc requirements for control devices operated at maximum
load exceed output of a single power supply, provide multiple power
supplies and subdivide loads to prevent overloading the power supply unit.
2.9
SECURITY EQUIPMENT CABINETS
2.9.1
Location
Provide cabinets where indicated to house auxiliary control system
components such as power supplies, control power transformers, auxiliary
relays, and amplifiers.
2.9.2
Construction
Cabinets shall be surface mounted, constructed of code-gage steel, and
finished on all surfaces with rust inhibiting prime coat and two coats of
flat medium gray enamel paint. Cabinets shall contain hinged door and
flush mounted lock and latch.
2.10
METAL CONTROL CABINETS
Provide cabinet to house locking control equipment. Furnish multiple
cabinets assembled to form a single unit with space to accommodate
equipment required to be installed therein.
2.10.1
Construction
Cabinet sides shall be louvered, 16 gage sheet steel attached to 14 gage,
12.7 mm 1/2 inches wide angle frames from the inside with bolts. The front
of the cabinet shall have hinged, lockable louvered doors and shall be
keyed alike. The rear of the cabinet shall have solid sheet steel unless
the cabinet is mounted against a solid wall, in which case a back is not
required. Trim, braces, angles, and exterior sides shall be primed and
painted. Visual parts outside the cabinet shall be beige. Cabinet shall
have 305 mm 12 inch writing surface the same width as the cabinet mounted
approximately 760 mm 30 inches above the floor.
2.10.2
Sloped Turrets
The top part of the cabinets shall have sloped fonts. The approximate
slope of the turret off the horizontal axis shall be 0.523 rad 30 degrees.
Cabinets shall be 635 mm 25 inches front to back unless indicated
otherwise, and a maximum overall height of 1065 mm 42 inches.
2.10.3
Cooling Fan
Cabinets shall have a cooling fan located on the interior of the panel side
with a capacity of 9.63 cubic meter 340 cubic feet per minute equipped with
a integral charcoal filter. The intake of the fan shall be positioned as
low as possible in the cabinet. The fan shall be fused, operate at 120
volts, and shall operate continuously.
SECTION 08745
Page 15
Previous Page
