All UL Listed signs and outline lighting which incorporate electric discharge tubing are required to use neon transformers and power supplies that comply with UL 2161, the Standard for Neon Transformers and Power Supplies. UL 2161 includes requirements for secondary ground fault protection (SGFP). Previous Situation Prior to September 3, 1999, gas tube sign transformers [...]
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There are other factors that complicate the situation. Some components are UL Recognized Components while others are UL Listed. UL recognized components are suitable for use only in an overall listed end use product. These recognized components are not suitable for use as field-installed units. Other products may carry a CSA Certification which may differ [...]
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Neon sign transformers differ from most other types of transformers one is likely to encounter. Unlike a more conventional transformer, for normal operation a neon sign transformer is specified to operate a minimum, as well as a maximum load. Why is this? To understand this requirement, we must look at what makes a neon sign [...]
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This article is intended to address a few of the common neon installation challenges associated with the secondary wiring from the transformer or power supply to the electrodes, as observed by a member of both the life safety and neon communities.
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Some features of electrical circuits and electrical systems are so fundamental they have appeared in some form in every edition of the National Electrical Code. These include insulation for wire type conductors, conductor (wire) sizing, and overcurrent protection for circuits (fuses or circuit breakers). Another long-time electrical safety requirement is grounding of electrical systems and [...]
(No Ratings Yet)“A safety revolution is underway in the electrical wiring of buildings,” writes Earl Roberts in his book Overcurrents and Undercurrents.1 He is writing about the use of electronics in circuit protection and specifically in the ground-fault circuit interrupter (GFCI). Just as electronics have enhanced the world of consumer appliances and communication, the use of electronics [...]
(No Ratings Yet)Question: Listed product modification Can a UL Listed product be modified in the field if the manufacturer indicates that the revision is ok and sends out new parts?
(No Ratings Yet)The excess space inside electrical supply stations (substations) is often considered for storage of construction materials. The National Electrical Safety Code® (NESC®) in Rule 110B2 prohibits storage inside an electrical supply station even when stored well away from the energized conductors and equipment. The only exception is the storage of minor parts essential to the [...]
(No Ratings Yet)An article entitled “Are All Those GFCIs Out There Working?” was printed on pages 66-68 of the November/December 1999 issue of the IAEI News. The printing of that article was in error and I wish to extend an apology to readers of the IAEI News and other interested parties for the premature release of that [...]
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IAEI, as the keystone of the electrical industry, is a membership driven, non-profit association promoting electrical safety throughout the industry by providing premier education, certification of inspectors, advocacy, partnerships and expert leadership in Electrical Codes and Standards development.
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