It supersedes the previous version of this document dated june 20, 2018 references in this document to sections or paragraphs in ul 508a are understood to be to the third edition of the standard with revisions dated july 3, 2018. The disconnect switches that are listed ul 508 are for motor disconnect applications. 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. Standardised typical solutions for motor circuits ul 508 part iv and ul 508a chap. Six faqs about harting connectors on ul 508a panels. Using connectors on ul 508a cabinets used to be a huge hassle for the the past. Documents sold on the ansi webstore are in electronic adobe acrobat pdf format, however some iso and iec standards are available from amazon in hard copy format. All of the above are trademarks of eaton or its affiliates. Ul panels are third party safety approved so other third parties can easily approve them. They have developed thousands of standards that are used and followed all around the world in various areas of industry.
Flow data not only manufactures the turnkey premier control panel padpro, but also designs, installs and commissions custom panel solutions for upstream and midstream processes, including ul 508a certified industrial control panels. Systems interface is a ul certified panel manufacturer. Ul standard for safety for industrial control panels, ul 508a second edition, dated december 20, 20 summary of topics this revision of ul 508a is issued to correct table sb4. Ul is a global independent safety science company offering expertise across three strategic businesses. The ones most commonly associated with electrical control panels are ul 508a, nec, nema, and iec. Make sure your industrial control panels are ul 508 or nec. 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. Ul 61010 replaces ul 508 for industrial power supplies norms. Ul 508a the standard ul 508a industrial machinery the following types of machines are identified as industrial machinery. Ul certification customers may access published standards materials by using the standards certification customer library sccl at.
As core elements of electrical and optical wiring, connection and infrastructure technologies, they are essential in. Control panel design guide according ul 508a eaton. And ul, with help from industry representatives like me, has been working on doing just that for a good 10 years. Csds proposals provide access to view the proposal and submit comments within ul s collaborative standards development system csds appropriately. Ul 508, the standard for safety for industrial control equipment. This document gives guidelines to panel builders on various issues including proper component selection, wiring methods and calculation of short circuit current ratings. Sa in the second edition of ul 508a, and subsequently appendix c in the third edition of ul 508a. References in this document to sections or paragraphs in ul 508a are understood to be. The disconnect switches that are listed ul 98 or ul 489 are for general purpose, main disconnect, or branch circuit protection. Ul 508a control panel design guide newark element14. We also offer two different types of subscriptions. These requirements also cover industrial control devices or systems that store or process information and.
Ul 508, the standard for safety for industrial control equipment, covers industrial control and related devices rated 1500 volts or less used for starting, stopping, regulating, controlling, or protecting electric motors. Theyre known as a thirdparty tester who certifies, validates, tests, verifies, inspects, audits, and educates. Ul 508 for industrial power supplies ansi ul 610102201 has been in effect for industrial power supplies since february 2016 as the official replacement standard for ul 508. With this misstatement, many manufacturers of industrial control panels which is ul 508a. January 26, 2017 has been established as effective date for the change in certification requirements from ul 508 and ul 6094741a to ul 6094741. There are dozens of ul standards, and components used in a ul 508a panel must be certified under the ul 508 standard.
A ul 508a certification is an industrial control panel directive, which electrical inspectors look for. Ul 508a certified industrial control panels flow data. Manual motor controllers shortcircuit ratings for ulcsat group installations. Like most industries the electrical industry uses many acronyms. This document is intended to be used to determine the requirements for components when used in industrial control panels. To learn more, check out the ul s faq pdf on the transition. Ul 508a standard for industrial control panels standards catalog. Content provider underwriters laboratories ul add to alert pdf. Plastics machinery, including injection molding, extrusion, blow molding, specialized processing, thermoset molding and size reduction.
Heres the official word from an faq pdf that the ul put together on. Ul 508a industrial control panels power distribution and. What is the official ul definition of an industrial. In september of 2005, ul 508a experienced a major revision. Understanding ul standards for industrial electrical. A ul 508 switch may seem to have a significant physical advantage over a ul 98 switch, being.
Ul 508a control panel design guide newark electronics. What is the difference between ul 98, ul 489 and ul 508. To make things worse, there are even other ul standards that apply to these areas that can be even be used. For a ul 508 device, that same requirement is only 0. Youll need to understand the transition is taking place and what it means when you see a reference to ul 60947 when you were expecting ul 508. Metalworking machine tools, machines that cut or form metal. Our breadth, established objectivity and proven history mean we are a symbol of trust, enabling us to help provide peace of mind to all. Industrial control panel manufacturers can use the spreadsheets below for guidance. The standard for industrial control panels is ul 508a. These requirements also cover industrial control devices or systems that store or process information and are provided with output motor control functions. Now, harting, in partnership with ul, has made it possible to easily connectorize ul 508a panels with existing harting products. The table below details some of the minimum spacing differences for 600 v rated ul 98 and 508 parts. Ul standard for safety for industrial control panels. The ul issued the first edition of 508a in april of 2001.
These different ul standards define the application for intended use. Ul 508 questions codes and standards general discussion. Ul 508 is the standard for industrial control equipment, whereas ul 508a is for industrial control panels. It shows that the panel complies with an acceptable safety standard. This guide replaces neither the standards including ul 508a that electrical equipment must comply. Panels for hazardous locations nrbx which are covered under ul698a panels containing intrinsic safety barriers and intended for circuits in hazardous areas. Per the ul 508a guideline a power transformer rated 5kva or lower will limit the fault to 2ka on the secondary side of the transformer section sb4. Ul certification customers have free access to ul standards, not including ul iec based standards. Ul508a is a safety standard for industrial control panels adopted by. Make sure your industrial control panels are ul 508 or nec compliant. Short circuit current ratings for combination motor. The first day of the workshop focuses on how to construct general use industrial control panels in accordance with the standard for industrial control panels, ul 508a, 3rd edition.
The ul representative at the meeting understood their predicament and vowed to try to harmonize the ul 508 standards with the latest iec standards. Sccr ratings instruction sheets with sccr ratings ul tested combinations pdf. Complete document ul standard for safety industrial control equipment. This means that ul 98 switches will be larger than ul 508 switches. 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. June 2008 ul 508 application guide make the most of your energysm. Ul 508a industrial control panels industrial control panels are rated. Ul 508a is the ul standard for the construction of industrial control panels. The requirements in ul 508 and ul 6094741a are at this time technically identical. For example, there is a section related to the pcbs, there is a section related to terminal spacing, wire spacing, etc. Ul 508a certification is an industrial control panel directive, which is sought by.
Ul 508 is a maze of a spec to work through, with different sections that pertain to different parts of the application. Ul standard for safety industrial control equipment. Approvals according to the old ul 508 remain valid, but are no longer listed as a possible option for conformity assessment in some ul categories. Therefore, because the rating of all of the devices on the secondary of the transformer are greater than 2ka, the sccr of the panel in this example would be 65ka. The ul508a certification provides to our customers, the end users, and any applicable governing authority, that the control panel complies with underwriters laboratories nationally recognized standards.
Ul 698a, ul 508a, nfpa 79 certified control panels the. Ul offers training in constructing industrial control panels in accordance with ul 508a. As an oem or panel shop, our facilities are subject to random inspections and audits by ul. Change and innovation are necessary for industrial applications, and this extends to testing and verification procedures. For customers including panel builders, its simply an education process, which is the purpose of this blog post. A ul panel shop can independently design and produce ul panels. Harmonic filters are available as both ul 508 and ul.
How to facilitate the ulcompliant approval to your control panel. These are acronyms for the safety standards used to produce and install electrical control panels and. If a customer follows ul 508a s construction requirements and recommendations, they can apply to. Requirements for industrial control panel safety, implications of ul 508a 2nd edition panelbuilder 2 contents introduction 3. Ul 508a standard for industrial control panels purcell systems. Right now theres a transition underway regarding ul 508 that customers. Murrelektronik mico modules are 4 or 2channel electronic control switches. Most products complying with ul 508 also comply with ul 6094741a. The standard for industrial control panels relating to hazardous classified locations is ul. Ul 508a, supplement sb is an approved method to determine sccr for industrial control panels and industrial machinery control panels. Fire pump controllers are covered by the requirements in the standard for fire pump controllers, ul 218.
Ul 218 fire pump controllers ul 508a industrial control panels ul 508c power conversion equipment adjustablespeed drive and accessories or modules for use with an adjustablespeed drive. Absence of name plates or incomplete indications of control panel characteristics. Ul 508 vs ul 508a 1 ul 508 covers industrial control devices and device accessories for starting, stopping, regulating, controlling, or protecting electric motors. Quality panel builder page 1 of 1 ampacity of wirescable as per ul508a ref. Underwriters laboratories, the ul in ul508a, is a global organization with over 120 years of history. The following six faqs explain this new standard and the bene. Ul certifies individual components as either ul listed or ul recognized.
Below is a list of frequently asked questions about ul s industrial control panel program. Selecting the right switch for the right application. Ul 508a supplement sa specific component requirements ul. As specified in the national electrical code nec, ul 508a supplement sb, the standard for industrial control panels, provides an accepted method for determining the sccr of the control panel. The following rules apply to manual motor controllers for motor loads only. Ul 508 listed components can be used freely in a ul 508a panel design. Ul is providing this alternative certification approach since the transition from ul 508 and ul 6094741a to ul 6094741 is a result of harmonization with the iec based standard.
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