2010 Construction and Material Specifications - Ohio Department of ...

821
733.03
hardware and equipment for each cabinet mounting method, including bolts for
drilled and tapped holes on metal supports, pole attachment clamps, pedestal
slipfitter, and anchor bolts and conduit ells for installation in concrete foundations.
Furnish steel anchor bolts that are galvanized at least 1 inch (25 mm) beyond the
threads. Certified cabinet anchor bolts are not required.
Directly place all equipment designed for shelf mounting on a shelf
except for loop detector units (amplifiers) and similar devices designed for
stacking on each other. Arrange components on shelves and devices on the door
so that a 1-inch (25 mm) minimum space separates them when the door is shut.
Ensure that plugs, wires, controls, or similar items do not compromise this space.
Reserve a minimum 4-inch (100 mm) clear area on the bottom of the
cabinet for the routing of cables. Do not locate panel mounted equipment in the
bottom 6 inches (150 mm) of the cabinet. Do not locate shelves or components
within 6 inches (150 mm) of the bottom of foundation mounted cabinets.
Arrange all equipment for easy withdrawal and replacement, without
the necessity of disturbing adjacent equipment. Permanently locate devices within
the cabinet to allow free circulation of air and that do not restrict air flow from fan
ducts or vents.
Ensure that the auxiliary equipment operates within a weatherproof
cabinet at ambient temperatures between -30 and 165 °F (-34 and 74 °C).
When terminals and panel mounted devices with exposed electrical
contact points are located next to shelf mounted equipment, provide spacers, shelf
lips, or other means to assure that component units cannot be accidentally moved
into contact with any exposed electrical terminal points.
Ensure that load switches, relays, flashers, fuses, switches, terminal
blocks, and other equipment mounted or plugged into the back or side panels are
readily accessible. Ensure that switches, controls, and indicator lights are visible
and easily operable without moving the components from their normal shelf
positions.
Furnish materials according to the Department’s Qualified Products
List (QPL).
2. Accessory Equipment
a. Ventilating Fan. Equip all cabinets with a forced air ventilating
fan. Furnish a fan that provides a capacity of at least 100 cubic feet (2.8 m 3 ) per
minute. Furnish a fan that is thermostatically controlled and adjusted to start at
cabinet temperatures above 120 °F (49 °C) and to stop when the temperature has
dropped below 100 °F (38 °C).
b. Load Switches. Furnish all cabinets with solid state, triple-signal
load switches complying with NEMA TS-1, Section 5. Additionally, ensure that
all load switches have both input and output indicators.
c. Conflict Monitor. Furnish all cabinets with a separate solid-state
conflict monitor device. Ensure that the cabinet wiring, in the event of monitor
disconnection, transfers the signals to a flashing condition. Furnish conflict