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| 型号： | PDB321-3 |
| 厂商： | COOPER INDUSTRIES |
| 元件分类： | 接线盒 |
| 中文描述： | 175 A, BARRIER STRIP TERMINAL BLOCK, 2 ROWS, 1 DECK |
| 文件页数： | 12/23页 |
| 文件大小： | 1700K |
| 代理商： | PDB321-3 |
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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相关代理商/技术参数 |
参数描述 |
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| PDB323-1 | 功能描述:栅栏接线端子 POWER DIST. BLOCK RoHS:否 制造商:TE Connectivity / AMP 产品:Barrier Terminal Blocks 系列: 类型:Dual Barrier, Flat Block without Mounting Ears 节距:9.53 mm 位置/触点数量:2 线规量程:22-12 电流额定值:20 A 电压额定值:300 V 安装风格:Through Hole 安装角:Vertical 端接类型:Screw 触点电镀:Tin |
| PDB323-3 | 功能描述:栅栏接线端子 POWER DIST. BLOCK RoHS:否 制造商:TE Connectivity / AMP 产品:Barrier Terminal Blocks 系列: 类型:Dual Barrier, Flat Block without Mounting Ears 节距:9.53 mm 位置/触点数量:2 线规量程:22-12 电流额定值:20 A 电压额定值:300 V 安装风格:Through Hole 安装角:Vertical 端接类型:Screw 触点电镀:Tin |
| PDB352 | 制造商:Pyle 功能描述:Bolt On Compression 200W Rms Tweeter Titanium Horn Driver 制造商:Pyle 功能描述:Bolt On Compre ion 200W Rms Tweeter Titanium Horn Driver 制造商:PYLE 功能描述:TWEETER TITANIUM HORN DRIVER BOLT ON COMPRESSION 200W RMS |
| PDB36-A | 功能描述:电线导管 PD3 Power Rated Single Channel Raceway B RoHS:否 制造商:Panduit 类型:Slotted SideWall Open finger design wiring cut 材料:Polypropylene 颜色:Light Gray 大小: 最大光束直径: 抗拉强度: 外部导管宽度:25 mm 外部导管高度:25 mm |
| PDB370-1 | 功能描述:栅栏接线端子 POWER DIST. BLOCK RoHS:否 制造商:TE Connectivity / AMP 产品:Barrier Terminal Blocks 系列: 类型:Dual Barrier, Flat Block without Mounting Ears 节距:9.53 mm 位置/触点数量:2 线规量程:22-12 电流额定值:20 A 电压额定值:300 V 安装风格:Through Hole 安装角:Vertical 端接类型:Screw 触点电镀:Tin |
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