UL 48-2011 pdf download

UL 48-2011 pdf download.Electric Signs.
2.50 PORTABLE SIGN – A cord connected sign weighing 22.7 kg (50 lbs) or less, has a weight times length value that does not exceed 575 kg-mm (1 500 lb-in) and if provided with mounting means is removable from its mounting without the use of tools. 2.51 PRESSURE WIRE CONNECTOR – A device that establishes a connection between two or more conductors or between one or more conductors and a terminal by means of mechanical pressure and without the use of solder. 2.52 QUALIFIED SERVICING – Any servicing performed by persons trained to repair and operate the equipment, and who are familiar with the risks involved. Some examples of qualified servicing include the replacing of components such as ballasts, lampholders, switches, and electric-discharge tubing. See also User Servicing, 2.75. 2.53 RACEWAY – An enclosed metal or nonmetallic channel, including conduit and tubing, designed for holding wires, cables, or electrical components. 2.54 RECEPTACLE – A contact device for the connection of an attachment plug. 2.55 RECESSED SIGN – A sign intended to be installed in a cavity in a wall or ceiling surface so that at least part of the sign is behind the surface. 2.56 RISK OF ELECTRIC SHOCK – A risk of electric shock exists between any two uninsulated conductive parts or between an uninsulated conductive part and earth ground, if the continuous current flow through a 1 500-Ω resistor in parallel with a 0.01 5-mF capacitor connected between the two points exceeds 0.5 mArms (0.7 mApeak) and if the open circuit voltage exceeds 30 Vrms or 42.4 Vpeak for dry, damp locations and, 1 5 Vrms or 21 .2 Vpeak for wet locations. 2.56 revised May 4, 201 2 2.57 RISK OF FIRE – A risk of fire exists between two conductive parts if the maximum voltage, current, or VA exceeds Class 2 limits. 2.58 RISK OF INJURY – A risk of injury exists when moving parts, sharp parts, or other physically hazardous mechanical constructions are accessible.
2.59 SCREW, MACHINE – A constant diameter screw intended for threading into a nut or threaded metal material. 2.60 SCREW, SELF-DRILLING THREAD-CUTTING – A screw that drills its own hole and cuts its threads as it is installed. A common type is called a TEK screw. 2.61 SCREW, SELF-TAPPING – A screw that drills its own pilot hole and forms its own threads. 2.62 SCREW, THREAD-CUTTING – A screw that cuts its own threads in a hole into which it is screwed. 2.63 SCREW, THREAD-FORMING – A screw that forms its own threads by deforming the metal on the edges of a hole into which it is screwed. 2.64 SCREW, WIRE BINDING – A screw used as a post around which a wire is to be wrapped. 2.65 SECTION SIGN – A sign shipped as subassemblies that requires field-wiring between the subassemblies to complete the overall sign. 2.66 SIGN – An electrically operated product that through illumination or mechanical means uses words, symbols, numbers, art, or other advertisement intended to convey information, attracts attention, provides information, or serves as decoration. 2.67 SIGN BODY – Portion of a sign that provides protection from the weather but is not an electrical enclosure. 2.68 SKELETON NEON TUBING – Neon tubing that is itself the sign or outline lighting and not attached to an enclosure or sign body. 2.69 SPLICE – Any point where one wire is connected to another wire. A wire terminating at a pressure wiring terminal or wire binding screw is not considered a splice.
2.70 STATIONARY SIGN – A cord-connected sign that meets all of the following: a) Intended to be fastened in place or located in a dedicated space; b) If fastened in place may be removed from its intended mounting with the use of no more than ordinary tools; c) Does not meet one or more criteria for portable signs (e.g. size and weight limitations); and d) Does not meet one or more criteria for mobile signs (e.g. provision for movement such as wheels or a trailer). 2.71 STRAIN-RELIEF – Knot, bushing, or equivalent intended to prevent strain from being transmitted through that portion of a wire or cord outside a product to the termination point of the wire or cord inside the product. 2.72 SUBASSEMBLY – Part or segment of a sign or outline lighting system that when assembled with all subassemblies forms a complete unit or product. For example, a sign subassembly is one part of an overall sign that when mechanically and electrically are assembled together form a complete sign.UL 48-2011 pdf download.