參數(shù)資料
型號: PDB370-3
廠商: COOPER INDUSTRIES
元件分類: 接線盒
中文描述: 310 A, BARRIER STRIP TERMINAL BLOCK, 2 ROWS, 1 DECK
文件頁數(shù): 12/23頁
文件大?。?/td> 1700K
代理商: PDB370-3
Form No. PDB
Page 2 of 23
Data Sheet #1049
Selection Table for SCCR Power Distribution Blocks and
Terminal Blocks
Short-Circuit Current Rated Power Distribution
Blocks
Cooper Bussmann offers three distinctly different styles of
short-circuit current rated 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. The table on this
page can assist in the selection of the right series for your
application requirements.
Why these are 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.
PDBs or TBs not marked with a SCCR are typically one of
the weakest links and may limit an assembly to no more than
10kA SCCR. The PDBFS and PDB Series have increased
spacing required where used in feeder circuits in equipment
listed to UL508A (UL1059 TBs must be evaluated for proper
spacings). Also, for building wiring systems, the PDBFS
Series and PDB Series power distribution blocks can be used
to meet the new 2005 NEC requirements in section
376.56(B) for PDBs in wireways.
More application info rmation on pages 19-23.
Industrial
Control
HVAC
Wireways
Product
Catalog
High
Spacing**
Panels
UL
NEC
Page
UL
Enclosed SCCR*
1” Air
UL 508A
1995
376.56(B)
2” Surface
Branch
Feeder
(Requires
Circuit
UL 1953)
Series PDBFS
3
UL 1953 Listed
Yes
Yes
Power Distribution Blocks
Yes
Series PDB
9
UL 1953 Listed
No***
Yes
w/optional
Power Distribution Blocks
cover
Series
UL 1059 Recognized
16XXX_UL
13
Terminal Blocks
No***
Yes
No****
Yes
No****
Yes
No
NDN63-WH-UL,
NDN111-WH-UL,
Ul 1059 Recognized
14002-3-UL,
16
Terminal Blocks
No
Yes
No
Yes
No
Yes
No
TB300-03SP-UL
Selection Table
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.
Spacing between
live parts of
live parts and
UL Standard
opposite polarity
grounded parts
or enclosure
@600V
508A Feeder
Circuits
508A Branch
Circuits
1995 HVAC
Through air
Over surface
@600V
1
2
1
38
12
38
12
Note: Refer to Specific UL standards for complete spacing details.
PDB & TB Minimum Spacing
Requirements for Equipment
Series PDBFS
Series PDB
Series 162 and 163
07-05-07
BU-SB07255
Magnum Terminal Blocks
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