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Edison UL Listed Open Style Power Distribution Blocks
Edison HPB series UL 1953-listed open-style power distribution blocks are suitable for use in UL508A panels to manage power wiring and branching, as well as provide tap-off points. These panel-mounted blocks offer a high short-circuit current rating of 200kA, and are available in a variety of pole configurations and a range of amperage ratings.
Short Circuit Current Rating (SCCR) 200kA with proper fusing
Flammability: UL 94V0
UL Listed - File E333541 Guide QPQS
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 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.