- 175A-310A (HPB Series)

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Open-style Power Distribution blocks for cable termination

• UL Listed
  
  
• SCCR rating of 200kA with copper conductors

Features

• Suitable for industrial control panel applications requiring high SCCR ratings
• Suitable for installation in wireways (with optional cover)
• Has minimum spacing requirements at 600VAC/DC of at least 1" through air and 2" over surface which meets UL 1953 requirements
• Used in UL508A panels
• Meets UL508A requirements and can be used in feeder and branch circuit applications
• Tin-plated aluminum connectors suitable for copper conductors
• Available safety covers for greater protection (purchase separately)
• Suitable for both factory and field wiring
• Panel mounting

Ratings

• Ampere ratings up to 310 Amps
• 600 VAC or VDC
• Short Circuit Current Rating (SCCR) 200kA with proper fusing
• Flammability: UL 94V0

Agency Approvals

• UL Listed - File E333541 Guide QPQS
• CE

Standards

• UL1953

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 and HPB series power distribution blocks have increased spacing required where used in feeder circuits in equipment listed to UL508A. The PB series UL1059 terminal blocks must be evaluated for proper spacing.
• Also, for building wiring systems, the EPDB series and HPB series power distribution blocks can be used to meet the 2005 NEC® requirements in section 376.56(B) for power distribution blocks in wireways.