UL 5-2016 pdf download
UL 5-2016 pdf download.Surface Metal Raceways and Fittings.
13.2.3 Steel sheet or coil which has an annealed zinc coating and is sheared, cut, or punched to result in a hole or an edge (straight or other) without also being termed at the edge or hole, is not required to have protection added at the edge or hole. However, in cases where the metal is formed at the edge or hole and the examination under magnification reveals damage to the zinc (see 13.2.2), added protection shall cover the damaged area.
13.3 Nonmetallic coatings
13.3.1 A nonmetallic protective coating, applied either before or after forming of the metal, shall:
a) Cover each coated surface completely,
b) Adhere firmly at all points on each coated surface,
C) Be smooth and free from blisters or other defects which can lessen the protective value, d) Be evenly distributed on each coated surface of the finished raceway or fitting part,
e) Meet the requirements of the Standard Test Method for Film Hardness by Pencil Test, ASTM 03363. with a 2H hardness rating, and the Standard Test Method for Measuring Adhesion by Tape Test, ASTM 03359, with a 4B rating, and
f) Comply with the Rust Resistance Test for Nonmetallic Coatings. Section 18.
13.3.2 A nonmetallic coating on precoated sheets shall additionally comply with the requirements of the
Standard Test Method for Coating Flexibility of Prepainted Sheet, ASTM D4 145.
14 Ceiling-Suspended Fan Support
14.1 A box or fitting intended to support a ceiling-suspended tan shall:
a) Be provided with a minimum of two steel cover retaining or fan mounting screws and matching threaded or unthreaded holes, Where screws other than No. 8-32 or No. 10-32 are provided, the box shall be marked in accordance with 25.7. A box or fitting having unthreaded holes shall be provided with:
1) Screws of the thread cutting type or
2) A screw and nut assembly for use with clearance holes. The screws shall be held such that they are not able to rotate.
b) Comply with the support tests in Sections 15 and 16,
C) Be marked in accordance with 25.6 and
d) Be provided with installation instructions in accordance with 24.8.
14.2 Screws intended to secure a ceiling-suspended fan mounting bracket to a box in accordance with
14.1(a) shall not have more than 9/16 in (14,3 mm) of exposed screw threads when a 1/B in (3.2 mm) thick bracket is secured to the box, Screws with more exposed threads comply with the requirement when a means to reduce the risk of contact between the screw threads and the wire insulation is employed.
PERFORMANCE
15 FIxture Support Test
15.1 A box or fining identified for fixture support shall not pull apart and shall not have any openings that exceed 1/16 inch (1.59 mm) in width between the box cover and base and between the box/raceway covers, A direct pull force equal to four times the manufacturer’s identified maximum load is to be supported by the fitting or box, when tested in accordance with 15.2. The manufacturer’s identified maximum load to be supported by the fitting or box shall not exceed 50 f (223 N).
15.2 The box or fitting is to be mounted as intended for service with one piece of raceway and secured in accordance with the manufacturer’s installation instructions. A direct pull is to be applied to a rigid steel bracket attached to the fixture-support studs on the titling or box. A weight that equals 4 times the maximum load identified by the manufacturer is to be suspended from the bracket at a point midway between the fixture-support studs for a period of 5 minutes.
16 Ceiling-Suspended Fan Support
16.1 A box or fitting Intended to support a ceiling-suspended fan (see Ceiling-Suspended Fan Support, Section 14) shall comply with the Fixture Support Test. Section 15. As a result of the test specified in 16.2
— 16.6, there shall not be cracking, crazing. breaking, or visible damage to the box, mounting ears, or box or fitting supporting system (other than bending), Additionally, there shall not be stripping of threads in the fitting or box supporting system. The fitting or box supporting system shall not be pulled loose from the test structure. There shall not have any openings that exceed 1)16 inch (1.59 mm) in width between the box cover and base and between the box/raceway covers. One sample shall be tested in the horizontal position, and one additional sample shall be tested in the inclined position.
16.2 A box or fitting shall be mounted with one piece of raceway and secured In accordance with the manufacturer’s installation instructions (see 24.8) to a supporting test structure and tested while:
a) In the horizontal position and
b) Inclined 30 degrees from the horizontal with the mounting screws perpendicular to the c&ing and the fan blades parallel to the floor. See Figure 16.1.
