Short-Circuit Current Rated Power Distribution Blocks

We offer distinctly different styles of short-circuit current rated (SCCR) power distribution blocks (PDBs) and terminal blocks (TBs) to match different application needs. The differences are whether the power distribution blocks are enclosed or not, and whether they are UL1953 Listed PDBs or UL1059 Recognized TBs, which have different minimum spacing requirements.

Why is this important?

• Assembly short-circuit current ratings (SCCRs) are now required in the 2005 NEC® and UL508A Listed Industrial Control Panels.
• Marking the SCCR on Industrial Control Panels (NEC® 409.110), Industrial Machinery Electrical Panels (NEC® 670.3(A)), and HVAC equipment (NEC® 440.4(B)) is now required by the National Electrical Code.
• Power distribution blocks or terminal blocks not marked with an SCCR are typically one of the weakest links and may limit an assembly to no more than 10 kA SCCR.
• The EPDB Series has increased spacing required where used in feeder circuits in equipment listed to UL508A (UL1059 terminal blocks must be evaluated for proper spacings).
• Also, for building wiring systems, the EPDB Series power distribution blocks can be used to meet the 2005 NEC® requirements in section 376.56(B) for power distribution blocks in wireways.

Use Finger-safe Power Distribution Blocks to manage your power distribution needs,from splitting primary power circuits into a variety of branch circuits to providing a fixed junction tap-off point.

• The modular design allows the end user to select and configure the number of poles required by each application.
  
  
• These power terminal blocks are engineered to allow copper conductors and maintain an SCCR rating of 200kA.
  
  
• These features make these distribution blocks the perfect solution to today’s power circuit wiring requirements.

Features

• Fully enclosed block for touch-safe isolation of live parts
• IP20 rating under specific conditions
• Integrated DIN-rail or direct panel mounting. (Panel mount only for EPDB306 and EPDB702)
• Captive termination screws cannot be lost
• Used in UL508A panels for both feeder and branch circuit applications
• Suitable for both factory and field wiring
• Tin-plated aluminum connectors suitable for copper conductors

Ratings

• Ampere ratings up to 760 Amps
• 600 VAC or VDC
• Short Circuit Current Rating (SCCR) 200kA with proper fusing
• Flammability: UL 94V0

Agency Approvals

• UL 1953 Listed - File E256146, Guide QPQS
• CSA Certified - Class 6228-01, File 47235
• CE component IEC 60947-7-1
• IEC-60529, IP20 (Finger-Safe) See table for specific conditions.

Open-style terminal blocks for cable termination

• Engineered to maintain an SCCR rating of 200kA with copper conductors and an SCCR of 10 kA for aluminum conductors
  
  
• Making these distribution blocks the ideal solution to today’s power circuit wiring needs.

Features

• Used in UL508A panels for branch circuit applications
• Standard aluminum box connectors accommodate copper wire. PB401x, PB512x and PB712x series accommodate copper or aluminum wire.
• Tin-plated aluminum connectors suitable for copper conductors
• Available safety covers for greater protection (purchase separately)
• Suitable for both factory and field wiring

Ratings

• Ampere ratings up to 760 Amps
• 600 VAC or VDC
• Short Circuit Current Rating (SCCR) 200kA with proper fusing
• Flammability: UL 94V0

Agency Approvals

• UL 1059 recognized - File E221592 Guide XCFR2
• CSA Certified: Class 6228-01, File 53787
• CE