stubs to project from the precipitator internal support system to the
support structure. Provide column extensions or stubs of adequate length
to provide clearance between the precipitator casing and hoppers and the
support frame beams. Provide sufficient clearance to permit the insulation
and casing to be installed and to accommodate the extremes of displacement
caused by thermal expansion. Support precipitator components from the
precipitator internal support system. Provide additional grid steel
required at the unit for support of precipitator components. Anchor the
precipitator on its centerlines and allow to expand in both directions.
Provide slide plates for installation between the precipitator free support
points and the support structure. [Design the precipitator supports for
seismic probability zone [3][4] in accordance with Section 15070N
MECHANICAL SOUND VIBRATION AND SEISMIC CONTROL.] Fabrication and erection
of structural steel shall conform to AISC 335.
2.3
ELECTRICAL REQUIREMENTS
2.3.1
Electrical Scope of Work
The work covered by this section consists of providing, adjusting, testing,
and placing in operation electrical equipment and materials which are an
integral part of the electrostatic precipitator provided under this section.
2.3.1.1
Material and Workmanship
Material and workmanship in factory assembled equipment, unless indicated
or specified otherwise, shall conform to Division 16, "Electrical." Include
interconnecting conduit and wire, grounding, and the electrical connection
of the mechanical equipment to the electrical power circuit under Division
16, "Electrical."
2.3.1.2
Electrical Supply Voltage
Provide supply voltage of [_____] volt, three phase and [_____] volt,
single phase, 60 hertz. Balance single phase loads on three phase systems.
Except as specified herein, design all equipment for energization from a
[_____] volt, single phase, 60 hertz electrical supply.
2.3.1.3
Supply transformers and accessory equipment as required to convert the
[[_____] volt, three phase] [[_____] volt, single phase], 60 hertz
electrical supply to those voltages required.
2.3.2
Equipment Enclosure Heaters
Provide outdoor equipment enclosures with space heaters to prevent
condensation of moisture within the equipment enclosures. Space the
heaters away and thermally insulate from close painted surfaces. Control
the heaters by an adjustable thermostat set to deenergize the heaters when
the temperature rises to 35 degrees C 95 degrees F, and to energize the
heaters when the temperature decreases to 29 degrees C 85 degrees F. The
space heaters shall not interfere with normal entrance of cables into the
enclosures or equipment within the enclosure.
2.3.2.1
Equipment Enclosure Nameplates
Provide equipment enclosures and associated switches, indicating lights,
meters, and devices with nameplates.
SECTION 15862N
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