project specifications need not be more current than
provided by the latest guide specification. Use of
SpecsIntact automated reference checking is
recommended for projects based on older guide
specifications.
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The publications listed below form a part of this specification to the
extent referenced. The publications are referred to within the text by the
basic designation only.
ASTM INTERNATIONAL (ASTM)
ASTM E 308
(2001) Computing the Colors of Objects by
Using the CIE System
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)
NEMA ST 20
(1992; R 1997) Dry-Type Transformers for
General Applications
NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)
NFPA 70
(2005) National Electrical Code
UNDERWRITERS LABORATORIES (UL)
UL 544
(1998) Medical and Dental Equipment
1.2
RELATED REQUIREMENTS
Section 11700 GENERAL REQUIREMENTS FOR MEDICAL AND DENTAL EQUIPMENT,
Section 16050N BASIC ELECTRICAL MATERIALS AND METHODS, Section 16402
INTERIOR DISTRIBUTION SYSTEM, apply to this section with the additions and
modifications specified herein.
1.3
DESIGN REQUIREMENTS
1.3.1
Lighthead Illumination Level
Lighthead shall produce a minimum of [80,000 lux] [7440 footcandles]
[_____] of illumination when measured at 1070 mm 42 inches from the face of
the light.
1.3.2
Correlated color of the lightbeam shall be between 3,500 degrees and 6,700
degrees Kelvin after filtration, as measured on the ASTM E 308 chromaticity
diagram.
1.3.3
Shadow Reduction
Lighting system shall provide a minimum level of 10 percent of the
unshadowed level when measured inside and at the bottom of a tube 50 mm 2
inch in diameter, and 76 mm 3 inch long, from a distance of 1070 mm 42
inches when the beam is obstructed by a disk 254 mm 10 inch in diameter,
580 mm 23 inches above the operating table, and normal to the axis of the
tube. Paint inside of tube with flat black.
SECTION 16553N
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