Power Distribution Blocks & Terminal Blocks with High Short-Circuit Current Ratings Table of Contents Page Selection Table .......................... 2 Power Distribution Blocks PDBFS Series 3-8 PDB Series . 9-12 Terminal Blocks 16XXX Series .13-15 14002-3-UL, TB300-03SP-UL, NDN63-WH-UL, NDN111-WH-UL 16-18 Application Notes 19-23 TOOLS TO ASSIST Technical Assistance Panel Layout 2D and 3D CAD files for some products to facilitate panel Application Engineering layouts found at www.cooperbussmann.com Application Engineering assistance is available to customers. The Application Engineering team is staffed by Engineering Services for SCCR engineers and available by phone with technical and OSCAR Compliance Software Eliminates the Guesswork in application support Monday Friday, 8:00 a.m. 5:00 p.m. Assembly Short-Circuit Current Rating (SCCR) Calculations. Central Time. The Cooper Bussmann innovative OSCAR Compliance Application Engineering can be reached via phone, fax or Software assists customer compliance with new Code and standards requirements for short-circuit current ratings as they email: relate to industrial control panels, equipment and assemblies. Phone: 636-527-1270 Go to www.cooperbussmann.com Fax: 636-527-1607 E-mail: fusetech cooperbussmann.com SCCR Panel Design Review for Improving Your Assembly SCCR. If your SCCR needs improvement, contact the Cooper Bussmann team for a design review. We guarantee our panel Online Resources SCCR review service for UL508A Supplement SB pre-certifica- Visit www.cooperbussmann.com for the following tion. resources: Arc-flash calculator Other Application Information on SCCR OSCAR compliance software Publications: Training modules Advanced Guide To Understanding Assembly Short-Circuit Current Rating Services Simplified Guide To Understanding Short-Circuit Current Engineering Rating Find It, Fix It, Forget it Training SPD (Selecting Protective Devices) Sections on Industrial Testing Control Panels and also Conductor & Terminations. Contact us for more information on Services: Phone: 636-207-3294 E-mail: services cooperbussmann.com 1011 SB-BU09622 Page 1 of 23 Data Sheet 1049Selection Table for SCCR Power Distribution Blocks and Terminal Blocks Short-Circuit Current Rated Power Distribution Control Panels. Marking the SCCR on Industrial Control Blocks Panels (NEC 409.110), Industrial Machinery Electrical Cooper Bussmann offers three distinctly different styles of Panels (NEC 670.3(A)), and HVAC equipment (NEC short-circuit current rated power distribution blocks (PDBs) 440.4(B)) is now required by the National Electrical Code. and terminal blocks (TBs) to match different application PDBs or TBs not marked with a SCCR are typically one of needs. The differences are whether the power the weakest links and may limit an assembly to no more than distribution blocks are enclosed or not, and whether they are 10kA SCCR. The PDBFS and PDB Series have increased UL1953 Listed PDBs or UL1059 Recognized TBs, which have spacing required where used in feeder circuits in equipment different minimum spacing requirements. The table on this listed to UL508A (UL1059 TBs must be evaluated for proper page can assist in the selection of the right series for your spacings). Also, for building wiring systems, the PDBFS application requirements. Series and PDB Series power distribution blocks can be used to meet the new 2005 NEC requirements in section Why these are important 376.56(B) for PDBs in wireways. Assembly short-circuit current ratings (SCCRs) are now More application information on pages 19-23. required in the 2005 NEC and UL508A Listed Industrial Selection Table Industrial Industrial Control Control HVAC Wireways Product Catalog High Spacing** Panels Panels UL NEC Page UL Enclosed SCCR* 1 Air UL 508A UL 508A 1995 376.56(B) 2 Surface Branch Feeder (Requires Circuit Circuit UL 1953) Series PDBFS 3 UL 1953 Listed Yes Yes Yes Yes Yes Yes Yes Power Distribution Blocks Yes UL 1953 Listed Series PDB 9 No*** Yes Yes Yes Yes Yes w/optional Power Distribution Blocks cover Series UL 1059 Recognized 16XXX 13 Terminal Blocks No*** Yes No**** Yes No**** Yes No NDN63-WH-UL, NDN111-WH-UL, UL 1059 Recognized 16 No Yes No Yes No Yes No 14002-3-UL, Terminal Blocks TB300-03SP-UL IP-20 finger-safe under specific conditions, see datasheet page 8. *When protected by proper fuse class with maximum ampere rating specified or smaller. ** See PDB Spacing Requirements for Equipment table below. ***Optional covers are available. Not IP-20, but provide a safety benefit. ****No, except: Yes, if single pole units installed with proper spacings. PDB & TB Minimum Spacing Series PDB Requirements for Equipment Series PDBFS Spacing between Spacing between live parts of live parts and UL Standard opposite polarity grounded parts or enclosure Through air Over surface 600V 600V 600V 508A Feeder 1 2 1 Circuits 508A Branch 3 1 1 8 2 2 Circuits 3 1 1 1995 HVAC 8 2 2 Note: Refer to Specific UL standards for complete spacing details. Series 162 and 163 Magnum Terminal Blocks 1011 SB-BU09622 Page 2 of 23 Data Sheet 1049