UL 5C:2016 pdf free download – STANDARD FOR SAFETY Surface Raceways and Fittings for Use with Data, Signal, and Control Circuits.
15 Mold Stress Test
15.1 A finished nonmetallic part shall not develop any holes, cracks, or other openings to permit entrance of the probe illustrated in Figure 9.1 for a depth greater than 1/8 in (3.2 mm), and cover secureness shall not be adversely affected when tested as described in 15.2.
15.2 Three 1 8-in (457-mm) lengths (axial) of the complete raceway or three complete fittings installed as intended onto 6-in (150-mm) lengths of raceway are to cool to room temperature in still air after being aged in a full-draft circulating-air oven for 7 hours at a temperature of 70.0 ±1.0°C (158.0 ±1.8°F). The test specimens are to be secured to a mounting surface during this test.
16 Crush Test
16.1 A finished part of a raceway system shall comply with each of the following when subjected to a static loading of 100 lbf (445 N) as described in 16.2 — 16.3.
a) The insulated conductors shall not be visibly damaged and shall not be short-circuited to one another or to a metal part of the raceway or fitting base as signalled by a buzzer, a lamp, or
other indicator.
b) The probe illustrated in Figure 9.1 when inserted point first as far as possible into any crack or other opening that results from the crushing, shall not enter the opening for a distance
greater than 1/8 in (3.2 mm) when evaluated 15 minutes after removal of the load.
c) The integrity of the assembly shall remain intact.
16.2 Six assemblies, each one consisting of an 18-in (457-mm) length of the raceway cover and base or one fitting cover and base, installed as intended onto a 6-in (150-mm) length of raceway are to be mounted onto a piece of plywood that is nominally 3/4 in (19 mm) thick. Insulated conductors are to fill the base as intended, and the cover is to be secured in place as intended on the base. Three of the assemblies are to contain the largest number of the largest size of conductor for which the raceway is intended. Three are to contain the largest number of the smallest size of conductor for which the raceway is intended with one of the smallest size conductors routed diagonally across the rest of the small conductors at an angle of approximately 30 degrees under the metal plate specified in 16.3.
16.3 Each of the six assemblies is to be tested by being crushed between two flat, horizontal steel plates in the jaws of a compression machine. The plates are to be 6 in (150 mm) long and wide enough to cover the raceway or fitting under test. The crushing force is to be applied perpendicular to the mounting surface at the rate of 0.50 ±0.05 in/minute or 12.7 ±1.27-mm/minute until a load of 100 lbf (445 N) is reached. The force is to be held at that level for 60 seconds, and then reduced to zero at the same rate.
17 Impact Test
17.1 The finished cover and the raceway or fitting base on which it is intended to be used shall be subjected to a single vertical impact as described in 17.2 and 17.3. The impact is to be applied by means of a solid smooth steel sphere 2.0 in (50.8 mm) in diameter and weighing 1.18 lb (0.535 kg), falling through a distance of 51 in (1.3 m). The insulated conductors shall not be visibly damaged and shall not be short-circuited to one another or to the raceway or fitting base (when constructed of metal) as signaled by a buzzer, a lamp, or other indicator.