degrees C 65 degrees F in winter with [_____] degrees C F ambient
temperature and [_____] degrees C F in summer with [_____] degrees C F dry
bulb and [_____] degrees C F wet-bulb ambient temperatures. All other
hardware and components shall be of corrosion-resistant material or
protected against corrosion. Motor compressor assembly shall be mounted on
vibration isolators.
2.4.17
Fungus Resistance
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NOTE: Specify fungus resistance for cranes in
marine or humid environments.
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Electrical connections such as terminal connections, circuit connections,
components and circuit elements shall be coated with fungus-resistant
varnish. Components and elements inherently inert to fungi or hermetically
sealed shall not be treated. Elements whose operation will be adversely
affected with the application of varnish shall not be treated.
2.5
ELECTROMAGNETIC INTERFERENCE SUPPRESSION
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NOTE: Specify EMI suppression if electro-magnetic
interference from the crane may be a problem to
sensitive electronics in the work area.
**************************************************************************
2.5.1
Shielded Cable
Pendant and festooned cables shall be the shielded type of braided
tinned-copper. Each cable shielding shall be grounded with a single
connection to equipment grounding conductor.
2.5.2
EMI/RFI Shielded Boxes
2.5.2.1
General
Boxes designed to house electronic and electrical control equipment,
instruments, metering equipment, etc., in installations where
electromagnetic compatibility and/or system security is required shall
protect interior components from stray radio frequency (RF) fields and
shall contain RF signals produced by interior components.
2.5.2.2
Construction
Electromagnetic Interference/Radio Frequency Interference (EMI/RFI)
shielded boxes shall be designed to meet UL 50 Type 12 and Type 13. The
shielded boxes shall be constructed of [1.519] [1.897] mm [16] [14] gauge
steel with seams continuously welded and ground smooth, without holes and
knockouts. Cover gasket shall be a combination of woven plated steel mesh
and oil-resistant gasket which will provide an EMI/RFI seal as well as an
oil-tight, dust-tight and water-tight seal between cover and body. Gasket
shall be attached to cover with oil-resistant adhesive. Stainless steel
cover clamps and screws which are quick and easy to operate shall be
provided on three sides of hinged cover for positive clamping.
SECTION 14630A
Page 49
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