UL 4:2004 pdf download – Armored Cable.
24.8 When provided, an externally-operable disconnect switch shall have a designated off position. When
the switch is operated vertically rather then horizontally, the up position shall be the on position.
25 Receptacles
25.1 Dedicated type
25.1.1 A sign is capable of being provided with one or mote receptacles each of which is dedicated for the connection of a specific product on or within the sign body, The product intended for connection to the dedicated receptacle shall comply with the appropriate requirements for its product class.
25.1.1 revised hay 2. 2001
25.1.2 The dedicated receptacle shall be of a type that has the same pin configuration as the attachment plug on the dedicated product.
25.1.3 A sign circuit supplying a dedicated receptacle shall have the circuit protected by supplementary overcurrent protection, consisting of a fuse, circuit breaker, or similar devices, having a current rating not exceeding the applicable value specified in Table 25.1. The total load in amperes imposed on the circuit shall not exceed the current rating of the supplementary overcurrent protective device or the values indicated In Table 19.2. See 18.20, 18.21, and 40.1.17.
10.4 With prudent attention to the risks to health and to the nsk of fire, the six specimens are to be cleaned with an organic solvent. Each specimen is to be examined for evidence of damage to the zinc coating occurring during specimen preparation, not during forming, and only specimens that are not damaged are to be selected for use in the test. One specimen of the unformed strip and one specimen of the armor are to be tested.
10.5 The two selected specimens are to be rinsed in water, and all of their surfaces are to be dried with clean cheesecloth. As much of the water as possible is to be removed In the drying operation because water slows the reaction between the zinc and the solution, thereby adversely affecting the test results, The surface of the zinc is to be dry and clean before a specimen is immersed in the copper sulfate solution. The specimens are not to be touched by the hands or anything else that can contaminate or damage the surfaces,
10.6 A glass, polyethylene, or other chemically nonreactive beaker having a diameter equal to twice the diameter measured over the specimen of partially uncoiled armor is to be filled with the solution of copper sulfate to a depth of not less than 3 inches or 76 mm. The temperature of the solution is to be maintained at 18.3 ±1.leC (65.0 ±2.0F).
10.7 One of the selected specimens is to be immersed in the solution and supported on end in the center of the beaker so that not less than half of its axial length is immersed. The specimen is to remain in the solution for 60 a, during which time it is not to be moved nor is the solution to be stirred,
10.8 At the end of the 60-s period, the specimen is to be removed from the beaker, rinsed immediately in running tap water, rubbed with dean cheesecloth (a dean soft-bristle test-tube or bottle brush in good condition and of applicable size may be used to rub the interior surfaces of the specimen of partially uncoiled armor, but cheesecloth is to be used on the other surfaces of this specimen and on the unformed strip) until any loosely adhering deposits of copper are removed, and Is then to be dried with clean cheesecloth. The turns of the specimen of partially uncoiled armor are not to be further separated during this process. Again, the hands and other damaging and contaminating objects and substances are not to touch the surfaces that were immersed. The part of the specimen that was Immersed is to be examined, considenng each edge and broad surface separately and disregarding the portion of the specimen within 1/2 inch or 13 mm of its immersed end.
10.9 If the part of the specimen that was immersed has any deposit of bright, firmly adhering copper outside the 1/2-inch cx 13-mm arid portion, an estimate is to be made and recorded of the percentage of each edge and broad surface that is covered with copper.