|
Written by Dan Pelland
|
|
The 2008 National Electrical Code®, NFPA 70 and the 2007 Electrical Standard for Industrial Machinery, NFPA 79 are both available as free on-line publications from the NFPA's web site. Registration is required, payment is not. The documents are distributed as "RealRead" e-books, complete with the reader application. Although features such as zoom, copy or print are absent, the text is legible and formatted exactly as the original publication. No additional program downloads are required. Many thanks to the NFPA for making these important publications available to everyone. |
|
|
Written by Dan Pelland
|
|
Here's help with solving your automation problems. Need to upgrade a product or manufacturing process? Need automatic controls? Intimidated by automation costs? Help is a phone call away. I'm Dan Pelland, control system designer, solo practitioner, licensed electrician. With years of practical experience, plus training in electronics, programming and drafting, I've got the tools I need to help you solve your automation challenges. My hand-picked vendors specialize in quality and low cost components. They run fabrication shops dedicated to producing safe, expertly crafted UL certified industrial control panels. |
|
Read more...
|
|
Written by Dan Pelland
|
|
Industrial control panels are defined by NEC Article 409, by NFPA70 and by UL508A. These standards help us design and build safe and effective equipment for use in manufacturing and other applications. Other standards such as Good Manufacturing Practices (GMP) are specific to segments such as pharmaceutical and food processing. LMCS has extensive experience with all of these standards and more, and will ensure compliance when appropriate. In addition, we will exceed customer expectations in every case with great, not just adequate, documentation and follow up service after delivery. |
|
|
Short Circuit Current Rating |
|
Written by Dan Pelland
|
|
Short circuit current rating, or SCCR, is required for every industrial control panel. Beginning with NEC 2005, Article 409 states that panels must be evaluated and marked for compliance with this standard. The methods for doing so are prescribed in UL508A supplement SB. Typically, each power component in a system has an SCCR rating determined by the manufacturer. The rating of the lowest rated component is the panel's rating. By selecting tested component combinations, SCCR ratings may exceed those of the individual parts. Current limiting components may also extend the panels SCCR performance. Careful selection of components and knowledge of component ratings is important to the safe and cost-effective design of industrial control panels. I've worked closely with device manufacturers and with UL field engineers over the years, and can assure my customers that their systems will be designed, first and foremost for safe operation and full compliance with NEC and UL standards. |
|
|