Technical Data 10537
Effective September 2019
Supersedes January 2019
UL Listed power distribution blocks
Catalog number example:
PDB323-3 is a 3-pole PDB323
Where:
•
The prefix “PDB323” defines the block’s
lineside characteristics (i.e., one conductor
port per pole that accepts 350 kcmil - #6 Cu/
Al conductors) and the loadside characteristics
(i.e., six (6) conductor ports per pole that each
accepts #4 - #14 Cu or #4 - #12 Al conductors).
•
The suffix “3” in this example defines this as a
three-pole block.
•
See the catalog number table for details on the
available lineside/loadside characteristics.
How to order:
Catalog symbol:
•
PDB___(poles)
Description:
Eaton’s Bussmann™ series high Short-Circuit
Current Rating (SCCR) power distribution blocks
provide up to 200 kA SCCR and help achieve
compliance with National Electrical Code (NEC®)
and OSHA requirements by resolving a common
SCCR “weak link” in industrial control panels.
Available in 1-, 2- and 3-pole panel mount
versions with popular lineside and loadside port
configurations, these blocks are UL® Listed and
provide the requisite spacing between uninsulated
opposite polarities or ground by meeting the UL
1953 1” through air and 2” over surface spacings
required per UL 508A for feeder circuit applications
and per NEC for field installations.
To increase application flexibility, these blocks
feature dual-wire rated ports that accept copper or
aluminum conductors while retaining a UL Listed
status.
Optional covers are available (order separately).
From the catalog number table, select the catalog
number that defines the desired lineside/loadside
port and conductor characteristics.
Add to the catalog number the suffix that defines
the desired pole configuration. Note, you must
select from the available number of poles for
each catalog number. These appear in the second
column of the catalog number tables.
Specifications:
Ratings
•
Volts: 600 V
•
Amps: 175 to 310 A
•
SCCR: 200 kA (see table for circuit protection
details)
Flammability rating
•
UL 94 V0
Storage and operating temperature range
•
-4°F to 248°F (-20°C to 120°C)
Agency information
•
UL 1953 Listed, Guide QPQS, File E256146
•
CSA® Certified, Class 6228-01, File 47235
Conductors†
•
Stranded 75°C copper and aluminum
•
Higher temperature rated conductors permitted
with appropriate derating
†
As specified in the catalog number table.
Technical Data 10537
UL Listed power distribution blocks
Effective August 2016
Catalog numbers:
Lineside
Line/load port
configuration
No. of
poles
1, 3
1, 3
1, 3
1, 2, 3
1, 3
Current
rating
(A)
175
175
175
175
Wire size
(Str/ferrule unless
noted)*
Wires
per
port
2/0 - #1 Cu/Al (Str)
1
#2 - #3 Cu/Al
1
#4 - #8 Cu/Al
1
#10 - #12 Al (Str)
1
#10 - #14 Cu
1
#4 - #8 Cu/Al
2
#10 - #14 Cu
2
2/0 - #1 Cu/Al (Str)
#2 - #3 Cu/Al
#4 - #8 Cu/Al
1-2
#10 - #14 Cu
1-2
2/0 - #1 Cu/Al (Str)
1
1
#4 - #8 Cu/Al
1
#10 - #12 Al (Str)
1
#10 - #14 Cu
1
#4 - #8 Cu/Al
2
#10 - #14 Cu
2
1
#4 - #6 Cu/Al (Str)
1
1
#8 Cu
1
#8 Al (Str)
1-2
#10 - #14 Cu
1-2
2.3 (20)
1/4-20 x 3/4” Stud
—
—
1
#4 - #8 Cu/Al
1-2
1
4.0 (35)
13.6 (120)
13.6 (120)
13.6 (120)
1
1
#10 - #14 Cu
1-2
1
#4 - #6 Cu/Al (Str)
1
#2 - #3 Cu/Al
1
#8 Al (Str)
1-2
#4 - #8 Cu/Al
1-2
#10 - #12 Al (Str)
1
#10 - #14 Cu
1-2
1/0 Cu/Al (Str)
1-2
1/0 Cu/Al (Str)
#1 - #6 Cu/Al
350kcmil - 2/0 Cu/Al (Str)
310
12.4 (110)††
2/0 - #1 Cu/Al (Str)
350kcmil - 2/0 Cu/Al (Str)
1, 3
1
1
310
Wires
per
Torque
port N•m (Lb-in)
#2 - #3 Cu/Al
#2 - #3 Cu/Al
#1 - #6 Cu/Al
1, 3
Torque
Ports/
N•m (Lb-in) pole
2/0 - #1 Cu/Al (Str)
350kcmil - 2/0 Cu/Al (Str)
310
Loadside
Wire size
(Str/ferrule unless
noted)*
13.6 (120)
31.1 (275)†
#1 - #6 Cu/Al
1
1-2
1
1-2
31.1 (275)
†
1
1-2
1
31.1 (275)
†
1/0 Cu/Al (Str)
1
1-2
1-2
1
4.0 (35)
2.8 (25)
2.8 (25)
4.0 (35)
2.3 (20)
#8 Al (Str)
1-2
#8 Cu
1
2.8 (25)
1
4.0 (35)
#10 - #12 Cu
1
#10 - #14 Cu
2
1
#8 Al (Str)
1-2
1
2.8 (25)
1
4.0 (35)
2.3 (20)
1-2
1
#4 - #8 Al (Str)
1
#6 - #8 Al (Str)
2
#4 Cu
1
#6 Cu
1-2
PDB220-_
1
200
PDB280-_
6
200
PDB321-_
6
200
PDB323-_
12
200
PDB370-_
200
PDB371-_
4.0 (35)
#8 Cu
#10 - #14 Cu
200
2.3 (20)
#10 - #12 Al (Str)
#2 - #3 Cu/Al (Str)
4
4.0 (35)
#10 - #12 Al (Str)
#4 - #6 Cu/Al (Str)
PDB204-_
4.0 (35)
1
1
200
4.0 (35)
1
1-2
1
13.6 (120)
#8 Cu
#10 - #14 Cu
Max
SCCR Catalog
(kA)** number
12.4 (110)††
#10 - #12 Al (Str)
#4 - #6 Cu/Al (Str)
Ports/
pole
5.6 (50)
5.1 (45)
#8 Cu
1-2
#10 - #12 Cu
1-2
#14 Cu
2
1/0 - #3 Cu/Al (Str)
1
5.6 (50)
#4 - #6 Cu/Al
1
5.1 (45)††
6
4.5 (40)
4.0 (35)
#8 Cu/Al
1
4.5 (40)††
#10 - #12 Cu
1
4.0 (35)††
#6 - #14 Cu
2
#4 - #6 Al (Str)
2
3
13.6 (120)
* 75°C wire (higher temperature rated wire acceptable with appropriate derating). Using a ferrule on a stranded conductor requires a correctly sized UL Listed ferrule
(customer supplied) applied according to the manufacturer’s specifications. Ferrule ratings apply to copper wire only.
** See pages 4 and 5 for the tested upstream overcurrent protective devices necessary for achieving these SCCRs.
† Torque rating for dual wire and ferrule application is 30.5 N•m (270 Lb-in).
†† Torque rating for ferrule application is 13.6 N•m (120 Lb-in).
2
Eaton.com/bussmannseries
Technical Data 10537
UL Listed power distribution blocks
Effective August 2016
Features and benefits
•
•
High SCCRs up to 200 kA, assist in achieving high SCCR for a
control panel per NEC and UL 508A requirements.
•
In compliance with UL 1953 minimum spacing requirements for
industrial control panel feeder and branch circuits.
•
Ferrule terminal application
Optional covers available to reduce the risk of accidental contact
with energized components.
•
Bussmann series PDB power distribution blocks are rated for use
with UL Listed ferrules (see catalog number table for details).
•
Ferrule applications allow for the use of a broader range of
conductor stranding and simulate a more efficient, solid wire
connection with the PDB terminal port.
•
Always use UL Listed ferrules in accordance with the
manufacturer’s specifications and instructions.
Dual wire port application
•
Dual wire applications are only viable when using two wires of
the same size, stranding, and insulating and conductor material in
the same port.
Rated for dual wire port application to increase the possible
number of lineside and loadside connections. E.g., PDB220 can
accept two wires into the lineside port (#4 - #14 Cu, #4 - #8 Al)
and two wires per port (eight connections per pole total) on the
loadside lug (#8 - #14 Cu, #8 Al).
Selecting SCCR power distribution blocks and terminal blocks
Short-circuit current rated power distribution blocks
Bussmann series power distribution blocks have three distinct
styles to match different application needs. There are the PDBFS_
and PDB_ high short-circuit current rated power distribution blocks
and the 16_ power terminal blocks. The differences are whether the
power distribution blocks are enclosed or not, and whether they are
UL 1953 Listed power distribution blocks or UL 1059 Recognized
power terminal blocks, which have different minimum spacing
requirements. The table on this page will assist you in selecting
which block is right for your application.
(NEC 670.3(A)), and HVAC equipment (NEC 440.4(B)) is required by
the NEC.
Power distribution and terminal blocks not marked with a component
SCCR are typically one of the weakest links in a control panel’s
equipment SCCR and may limit the equipment SCCR to no more
than 10 kA. The PDBFS_ and PDB_ products have the increased
spacing required for use in feeder circuits of equipment listed to
UL 508A (UL 1059 terminal blocks must be evaluated for proper
spacings). Also, for building wiring systems, the PDBFS_ and
PDB_ power distribution blocks can be used to meet the 2014 NEC
requirements in section 376.56(B) for power distribution blocks in
wireways.
Why these are important
Per the NEC and OSHA, equipment cannot be installed in an
electrical system at a location where the available fault (short-circuit)
current is greater than the equipment’s SCCR.
Further, equipment SCCRs are required in the 2014 NEC and for UL
508A Listed control panels. Marking the equipment SCCR on control
panels (NEC 409.110), industrial machinery electrical panels
See the last page of this data sheet for SCCR tools and resources to
help you further understand and solve your SCCR needs.
Selection table
This table provides an overview of the three Bussmann series power distribution and terminal blocks mentioned above. For details on the
PDBFS blocks, see data sheet number 10536. For the 16_ blocks, see data sheet numbers 10533 (UL Recognized power distribution blocks),
10534 (splicer blocks) and 10535 (stud blocks).
Catalog
symbol
PDBFS_
PDB_
16_
*
**
***
†
††
UL status
UL 1953 Listed power
distribution blocks
UL 1953 Listed power
distribution blocks
UL 1059 Recognized
terminal blocks
Enclosed
High SCCR*
Spacing **
1” air,
2” surface
Yes***
Yes
Yes
Yes
Yes
Yes
Yes
No†
Yes
Yes
Yes
Yes
Yes
Yes, with
optional cover
No†
Yes
No††
Yes
No††
Yes
No
UL 508A panel
branch circuit
UL 508A panel
feeder circuit
Wireways
HVAC
NEC 376.56(B)
UL 1995 (requires UL 1953)
When protected by proper fuse class with maximum ampere rating specified or smaller.
For details, see PDB and TB minimum spacing requirements for equipment table below.
IP20 finger-safe under specific conditions, see data sheet no. 10536, page 5.
Optional covers are available.
No, except: Yes, if single pole units installed with proper spacings.
Power distribution and terminal block minimum spacing requirements for equipment
Spacing between live parts of opposite polarity
UL standard
508A feeder circuits
508A branch circuits
1995 HVAC
Through air @ 600 V
1”
3/8”
3/8”
Over surface @ 600 V
2”
1/2”
1/2”
Spacing between live
parts and grounded parts
or enclosure @ 600 V
1”
1/2”
1/2”
Note: Refer to specific UL standards for complete spacing details.
Eaton.com/bussmannseries
3
Technical Data 10537
UL Listed power distribution blocks
Effective September 2019
Upstream fusing for SCCR and minimum enclosure data
This table contains the tested SCCR levels for each PDBFS power distribution block using the specified lineside and loadside conductors and
Bussmann series Class J, RK1, RK5 and T fuses. Using these tested SCCR levels also requires the power distribution block be installed in an
enclosure with the minimum size indicated for each catalog number.
Conductors (AWG or kcmil)
Catalog number
Lineside
Loadside
G
SC (480 V)
PDB204-1, -3
2/0 - #8
PDB220-1, -3
2/0 - #8
PDB280-1, -3
2/0 - #8
PDB321-1, -2, -3
2/0 - #8
PDB323-1, -3
350 - #4
PDB370-1, -3
350 - #4
PDB371-1, -3
350 - #4
2/0 - #8
#4 - #12
#4 - #14
Stud
#4 - #12
#4 - #14
#4 - #8
#4 - #12
#4 - #8
#4 - #14
1/0 - #6
1/0 - #12
—
—
60
—
—
60
—
60
—
60
—
60
Fuse class and maximum amps*
RK1
RK5
J
LPN-RK (250 V) FRN-R (250 V)
LPJ LPS-RK (600 V) FRS-R (600 V)
200
200
175
200
400
175
400
175
400
175
400
175
100
100
100
100
200
100
200
100
200
100
200
100
Ampacities 75°C per NEC Table 310.16 and UL 508A Table 28.1.
* Class CC 30 A (LP-CC-30, FNQ-R-30, KTK-R-30) or less are suitable for all SCCRs in this table.
4
Eaton.com/bussmannseries
60
60
30
60
100
30
100
30
100
30
100
30
T
JJN (300 V)
JJS (600 V)
SCCR
200
200
175
200
400
175
400
175
400
175
400
175
200 kA
200 kA
100 kA
200 kA
200 kA
100 kA
200 kA
100 kA
200 kA
100 kA
200 kA
100 kA
Minimum
enclosure
size (in)
16 x 16 x 6.75
16 x 16 x 6.75
16 x 16 x 6.75
24 x 20 x 6.75
24 x 20 x 6.75
24 x 20 x 6.75
24 x 20 x 6.75
Technical Data 10537
UL Listed power distribution blocks
Effective September 2019
Upstream circuit breakers for SCCR and minimum enclosure data
This table contains the tested SCCR levels for each PDB power distribution block using the specified lineside and loadside conductors and
Eaton circuit breakers. Using these tested SCCR levels also requires the power distribution block be installed in an enclosure with the minimum size indicated for each catalog number.
PDB_ SCCR as rated with Eaton circuit breakers
Catalog no.
PDB220
PDB321
Suitable copper conductors
kcmil/AWG
Lineside
Loadside
#4 - #10
65
480
2/0 - #8
#12
22
480
2/0 - #8
#14
14
480
2/0 - #8
#4 - #10
65
480
2/0 - #8
#12
22
480
2/0 - #8
#14
14
480
350 - #4
#4 - #6
65
480
JGH250, J250H
250
350 - #4
#8
42
480
250
350 - #4
#10
14
480
JGH250, J250H
JGH250, J250H, JGE250, J250E, JGS250,
J250S,
350 - #4
350 - #4
#4 - #6
#8
#10
#8
#10
#4 - #6
#8
65
42
25
50
25
65
42
350 - #4
#10
14
350 - #4
350 - #4
#4 - #6
#8
#10
#4 - #6
#8
65
42
25
50
42
350 - #4
#10
14
350 - #4
#4 - #6
#8
#10
65
50
25
350 - #4
350 - #4
PDB371
Volts max
Overcurrent protection circuit breaker required
Type
Max amp
EGC125, E125C, EGH125, E125H, PDG13P,
125
PDG13M
EGC125, E125C, EGE125, E125E, EGS125,
E125S, EGH125, E125H, PDG13P, PDG13F,
125
PDG13G, PDG13M
EGC125, E125C, EGB125, E125B, EGE125,
E125E, EGS125, E125S, EGH125, E125H,
125
PDG13P, PDG13C, PDG13F, PDG13G,
PDG13M
EGC125, E125C, EGH125, E125H, PDG13P,
125
PDG13M
EGC125, E125C, EGE125, E125E, EGS125,
E125S, EGH125, E125H, PDG13P, PDG13F,
125
PDG13G, PDG13M
EGC125, E125C, EGB125, E125B, EGE125,
E125E, EGS125, E125S, EGH125, E125H,
125
PDG13P, PDG13C, PDG13F, PDG13G,
PDG13M
2/0 - #8
PDB323
PDB370
SCCR, RMS
Sym, kA
Minimum
enclosure size
(in.)
16 x 16 x 6.75
24 x 20 x 6.75
250
24 x 20 x 6.75
480
JGC250, J250C, JGU250, J250U, JGX250,
J250X
250
480
480
250
250
480
JGH250, J250H
JGH250, J250H
JGH250, J250H, JGE250, J250E, JGS250,
J250S,
480
JGC250, J250C, JGU250, J250U, JGX250,
J250X
250
480
480
250
250
480
JGH250, J250H
JGH250, J250H
JGH250, J250H, JGE250, J250E, JGS250,
J250S,
480
JGC250, J250C, JGU250, J250U, JGX250,
J250X
250
250
250
Eaton.com/bussmannseries
24 x 20 x 6.75
24 x 20 x 6.75
5
Technical Data 10537
UL Listed power distribution blocks
Effective September 2019
Dimensions — in (mm)
Catalog No.
PDB204-3, PDB220-3,
PDB323-3, PDB370-3,
PDB323-1, PDB370-1,
PDB204-1, PDB220-1,
PDB321-1
PDB321-2
PDB321-3
Width
A
4.25 (108)
6.30 (160)
1.98 (50)
1.07 (27)
1.98 (50)
3.60 (91)
5.20 (132)
PDB280-3
PDB371-3
PDB371-1
PDB280-1
Length
B
2.88 (73)
5.50 (140)
4.00 (102)
2.88 (73)
4.00 (102)
4.00 (102)
4.00 (102)
PDB204
C
2.13 (54)
3.70 (94)
3.33 (84)
1.75 (44)
3.33 (84)
3.33 (84)
3.33 (84)
Height
D
1.62 (41)
3.25 (83)
—
—
—
1.62 (41)
3.23 (82)
E
2.25 (57)
4.75 (121)
3.37 (86)
2.25 (57)
3.37 (86)
3.37 (86)
3.37 (86)
PDB220
C
C
Lineside
B
Loadside
A
Lineside
E
F
F
B
Loadside
Loadside
D
A
A
D
Lineside
B
B
PDB280
C
Lineside
E
Loadside
F
A
B
Loadside
A
Loadside
A
E
D
B
6
F (Hole)
0.22 (6)
0.22 (6)
0.21 (5.3) x 0.41 (10)
0.20 (5)
0.21 (5.3) x 0.41 (10)
0.21 (5.3) x 0.41 (10)
0.21 (5) x 0.41 (10)
Eaton.com/bussmannseries
Lineside
Lineside
Technical Data 10537
UL Listed power distribution blocks
Effective September 2019
PDB321
PDB323
Lineside
C
Loadside
C
B
E
F
F
Loadside
Lineside
Loadside
A
A
B
A
E
Lineside
D
F
Loadside
A
D
Loadside
D
A
Lineside
B
Lineside
E
PDB370
PDB371
C
C
E
F
Lineside
Loadside
Lineside
E
Loadside
F
A
A
B
B
F
F
Loadside
A
Loadside
D
A
E
B
D
Lineside
E
B
Lineside
Eaton.com/bussmannseries
7
Technical Data 10537
UL Listed power distribution blocks
Effective January 2019
Optional covers
SCCR tools and resources
From the table below, order the cover catalog number that matches
the block catalog number. Order the quantity indicated in the “order
quantity” column. E.g., the 3-pole block PDB204-3 requires ordering
three CPB162-1 covers (one cover for each pole).
Eaton offers many resources that help customers understand and
assess their SCCR needs.
Block catalog no.
PDB204-1
PDB204-3
PDB220-1
PDB220-3
PDB280-1
PDB280-3
PDB323-1
PDB323-3
PDB370-1
PDB370-3
PDB371-1
PDB371-3
PDB321-1
PDB321-2
PDB321-3
Poles
1
3
1
3
1
3
1
3
1
3
1
3
1
2
3
Cover catalog no.
CPB162-1
CPB162-1
CPB162-1
CPB162-1
CPB162-1
CPB162-1
CPDB-1
CPDB-1
CPDB-1
CPDB-1
CPDB-1
CPDB-1
CPDB-1*
CPDB-2*
CPDB-3*
Order quantity
1
3
1
3
1
3
1
3
1
3
1
3
1
1
1
Please use the following whenever you have questions, concerns or
just need help with SCCR ratings.
•
Application notes:
• Developing an effective SCCR plan for facilities and purchasers
of industrial equipment — publication no. 10367
•
Developing an equipment SCCR standard for manufacturers of
industrial equipment — publication no. 10368
•
Four steps to determine equipment SCCR — publication no.
10538
•
Equipment SCCR made easy brochure — publication no. 10374
•
SPD (Selecting Protective Devices) handbook; over 250 pages
covering the application of overcurrent protective devices, SCCR
and more — publication no. 3002
* For the PDB321-_ blocks, order one cover for each block (not per pole).
The only controlled copy of this data sheet is the electronic read-only version located on the Eaton network drive. All other copies of this document are
by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the
end user with design applications. Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit
distribution of any products. Eaton also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once
a product has been selected, it should be tested by the user in all possible applications.
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
Eaton.com
Bussmann Division
114 Old State Road
Ellisville, MO 63021
United States
Eaton.com/bussmannseries
© 2019 Eaton
All Rights Reserved
Printed in USA
Publication No. 10537
September 2019
8
Eaton.com/bussmannseries
Eaton, Bussmann and OSCAR are valuable
trademarks of Eaton in the U.S. and other
countries. You are not permitted to use
the Eaton trademarks without prior written
consent of Eaton.
CSA is a registered trademark of the Canadian
Standards Group.
NEC is a registered trademark of the National
Fire Protection Association, Inc.
UL is a registered trademark of the
Underwriters Laboratories, Inc.
For Eaton’s Bussmann series
product information,
call 1-855-287-7626 or visit:
Eaton.com/bussmannseries
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