Jun 30, 2015 what panel builders need to know about ul 60947. No particular requirements apply when the motor is selfprotected by its. Ul standards encompass uls extensive safety research and scientific expertise. Ul 508a industrial control panels power distribution and control. This guide is designed to cover the most common applications of electrical control products per ul 508a, but is by no means an exhaustive guide, and does not cover all uses and applications associated with ul 508a regulations. In addition to general use panels, requirements for the following panels are contained in ul 508a. The following six faqs explain this new standard and the bene. You can rely on our extensive and reliable portfolio of products and systems that takes all north american requirements into account. Control panel design guide according ul 508a eaton pdf.
A new subsidiary named simply ul llc, a limited liability corporation, took over underwriters laboratories product testing and certification business. The entire panel and all components inside will be required to meet a defined short circuit current rating sccr for the application, and the panel will have to be marked with the appropriate sccr. Ul 5084891077 98508508c512 for verification of the presence of certificates of product compliance with applicable manufacturing standards. How to ensure troublefree approval of your ulcompliant.
Once you have completed the program and have an established industrial control panel file, ul will make four unannounced visits per year to ensure that you are building panels in accordance to ul 508a. Underwriters laboratories ul on january 1, 2012, underwriters laboratories transformed from a nonprofit organization to a forprofit company in the u. With over a century of experience in the development of more than 1,500 standards, ul is an accredited standards developer in the us and canada. This method is based upon the weakest link approach. This document is intended to be used to determine the requirements for components when used in industrial control panels. We are able to supply control panels in nema 1, 12, 3r, 4x enclosures. Ul is a global independent safety science company offering expertise across three strategic businesses.
One key to being a ul508a certified industrial control panel builder is component traceability. A brief history of ul 508a and tips for how control panel. The standard provides guidelines to panel builders on various issues including component selection and wiring methods. The followup service fus inspections will begin within 60 days of your company having an active industrial control panel file. To build a control panel that will comply with standards in the usa and canada, it is not sufficient to simply use components that are certified in accordance with ul or csa. While that seems a reasonable request, and is certainly in the best interest of safety, in practice it can be difficult to comply with. Using connectors on ul 508a cabinets used to be a huge hassle for the the past. The ul 508a listing mark on an industrial control panel provides evidence of third party certification to the municipal inspection authority and to the purchaser of the panel. One key to being a ul 508a certified industrial control panel builder is component traceability.
It shows that the panel complies with an acceptable safety standard. Equipment intended to be connected to a source of supply greater. Six faqs about harting connectors on ul 508a panels. Requirements for industrial control panel safety, edition and.
With this misstatement, many manufacturers of industrial control panels which is ul 508a were misled to believe the information you provide was related to them directly. Ul 508a control panel design guide newark electronics. Visit our website free resources and consulting support on control panel standards for the usa and canada. Ul standards encompass ul s extensive safety research and scientific expertise. Ul 508a certification is an industrial control panel directive, which is sought by. The sccr requirements for ul 508a are effective after april 25, 2006. And ul508a, along with a whole list of other standards, are set by underwriters laboratories. Ul 508a certification description from quality controls, inc. That means requirements for the entire ul 508a 2nd edition including many changes that. A ul label signifies that the panel builder has met the requirements of ul508a, and that their panels are subject to inspection by ul field representatives. Underwriters laboratories ul is an independent testing company that provides product safety standards and third party product safety certification. They come in different sizes and shapes, for use in a variety of industries. A ul 508a certification is an industrial control panel directive, which electrical inspectors look for.
Ul 508a standard for industrial control panels standards. Overview of code changes in nec article 409 overview of ul 508a supplement sb. This includes proper component selection, wiring methods, and calculation of short circuit current ratings sccr for all custom panels we design and build. Effective immediately, this revised standard will be exclusively used for evaluation. Ul 508a supplement sa specific component requirements. Control panel technical guide how to ensure troublefree approval of your ulcompliant control panels 8 2 ul standards and circuit design design of a motor circuit as per standard ul 508 part iv and ul 508a chap. Not every panel is inspected by ul, but panels are subject to inspection by ul depending upon the quantity of ul labeled panels made in a give time period. Ul recognized components in a control panel must ensure that their application meets additional requirements described in their ul procedure.
Electrical panels must be designed to provide the necessary minimum wire bending space in accordance with ul. Ul 508a certification is an industrial control panel directive, which is sought by electrical inspectors. The marking requirements of ul standard 508a industrial control panels for sccr ratings do not take effect until april 2006. Ul 508a the standard z the standard covers industrial control panel assemblies which may contain. Formerly supplement sa of ul 508a 1 listed components 1. Overhead crane control industrial machinery, including metal working machine tools, plastic injection molding machinery flame safety supervision control. Ul 508a ul standard for safety industrial control panels.
Make sure your industrial control panels are ul 508 or nec. Now, harting, in partnership with ul, has made it possible to easily connectorize ul 508a panels with existing harting products. Ul 508a standard for industrial control panels standards catalog. Bay breakers inc is now a ul 508a listed panel shop the stringent standard for industrial control panels. Fuses ul 2484 ul 24812 primary side tapped off the load side of the bcp, additionally to above miniature circuit breaker acc. Ul 508a control panel design considerations c3controls. Ul 508a, standard for industrial control panels intertek. The ul listing mark on an industrial control panel provides evidence of third party certification to the municipal inspection authority and to the purchaser of the panel. With the release of the ul 508a, ul standard for safety for industrial control panels, an industryapproved method is now available. Requirements for industrial control panel safety, implications of ul 508a 2nd edition. See the last page of this data sheet for sccr tools and resources to. Industrial control panels formerly supplement sa of ul 508a 1 listed components 1.
In this example, the 125a circuit breaker is the largest shortcircuit protective device. These requirements cover industrial control panels intended for general industrial use, operating from a. Ul 508a ul 1059 terminal blocks must be evaluated for proper spacings. A procedure document is written for each individual panel builder. In extending its global public safety mission, ul standards partners with national standards bodies in countries around. Control panel design guide according ul 508a eaton. A ul508a panel is an electrical control panel with a ul508a label. Ul 508a control panel design guide the easytodesign guide for selection of electrical control components in control panels used in industrial machinery applications this guide is provided to assist with the design of control panels per ult 508a, specifically for use in industrial machinery applications. Basic steps for calculating the sccr of a control panel. This document replaces what was supplement sa in the second edition of ul 508a, and subsequently appendix c in the third edition of ul 508a. Ul 508a sb method for determining panel sccr branch component sccr can be effectively raised by components in the feeder by the following four methods sb4. These requirements cover industrial control panels intended for general industrial use, operating from a voltage of volts or less.
Ul 508a standards commonly apply for the closed type enclosures. In 2005 ul 508a was changed to require control panel builders to include a short circuit current rating on the control panel assembly. Reference manual shortcircuit current rating sccr of. That means requirements for the entire ul 508a 2nd edition. An industral control panel shall be ul labeled and built by panel builder with an ul 508a license. Nec article 409 and ul 508a shortcircuit current rating sccr of industrial control panels. Fingersafe power distribution blocks cooper industries. A ul 508a panel should be marked industrial control panel with the ul logo.
The second day instructs industrial control panel customers on how to establish shortcircuit ratings for individual industrial control panels in accordance with the requirements outlined in the new standard for industrial control panels, ul 508a, 3rd edition, supplement sb. Ul508a, along with the national electric code nfpa70 and the nfpa79 standard for industrial machinery, dictates the design and construction of industrial control panels in the united states. Ul 508a standard for industrial control panels purcell systems. Eatons assortment of new supplementary handles meet these stricter requirements in both the ul 508a and nfpa 79. Ul 508 labelling ul 508a certification to panel builder. Ul 508a control panel design guide newark element14. Ul 508 type e manual selfprotected combination motor controllers. These requirements also cover industrial control panel enclosures and industrial control panels primarily intended for flame safety supervision of combustible fuel type equipment, elevator control, crane or hoist control, service equipment use, marine use, air conditioning and refrigeration equipment. Excerpts from ul 508a standard for safety for industrial control panels are the property of underwriters. The conductors to the individual loads are not less than.
Control panels february 4, 2019 this document is intended to be used to determine the requirements for components when used in industrial control panels. This certifies it meets the ul508 safety standard and was produced by panel shop with ul 508a certification. One of the listed ways that you can attain a valid sccr label is by following ul508a supplement sb2, which is available to ul 508a shops. Control panels are essential for enabling the beginning and ending procedures of a process or piece of equipment. Four parts part 1 general use part 2 specific use part 3.
Control panels containing predominately communication equipment, such as telephone equipment and intended for installation in accordance with chapter 8 of the nec, is evaluated to the standard for information technology equipment safety part 1. Ul 508a control panel design guide the easytodesign guide for selection of electrical control components in control panels used in industrial machinery applications this guide is provided to assist with the design of control panels per ult 508a, specifically for use in. Ul 508a industrial rating does not include panels for hazardous locations nrbx which is covered under ul698a. Overview of supplement sb from the ul 508a standard. Ul 508a, supplement sb, provides an analytical method to determine the shortcircuit current rating of an industrial control panel. Ul 508a for functional design and the calculation of ratings applicable standards from beginning to end of a project product selection. Only panels constructed to meet the full construction requirements and recommendations defined in ul508a can be labeled as such. Find the most uptodate version of ul 508a at engineering360. We meet with our vendors regularly to verify that all products supplied are ul listed, and are current production. Intertek s etl panel builder certification program for industrial control panels icps delivers an alternative, costefficient approach to certification for manufacturers who custombuild or massproduce icps. Underwriters laboratory implemented ul 508a supplement sb to require compliance by ul authorized panel builders.
834 722 1259 529 1416 327 25 395 334 1449 395 1432 353 72 567 1124 1085 1521 164 1342 1179 1503 40 1104 38 1258 255 1152 946 49 1405 875 308 294 1447 1376 188 277 498 39 368 1146 1259 856 639 1040 826 284