Edison Power Distribution Blocks Selection Guide*
Series
UL † Enclosed
High
SCCR**
Spacing***
1” Air
2” Surface
Industrial Control Panels
UL 508A
Branch Circuit
Industrial Control
Panels
UL 508A
Feeder Circuit
HVAC
UL 1995
Wireways
NEC® 376.56(B)
(Requires UL 1953)
EPDB
UL 1953 Listed
Power Distribution
Blocks
Yes Yes Yes Yes Yes Yes Yes
HPB
UL 1953 Listed
Power Distribution
Blocks
No**** Yes Yes Yes Yes Yes Yes (with optional cover)
PB
UL 1059 Recognized
Terminal Blocks
No**** Yes No***** Yes No***** Yes No
† IP-20 nger-safe under specic conditions.
*Refer to specic UL standards and NEC sections for a complete application guide.
** When protected by proper fuse class with maximum ampere rating specied or smaller.
This does not apply to PB40, PB51 and PB71 series.
***See Minimum Space Requirements for Equipment table below.
****Optional covers are available. They are not IP-20 rated, but do provide additional protection against direct contact with Live Parts.
*****Exception: Yes, if single pole units installed with proper spacings.
Minimum Space Requirements for Equipment
UL Standard
Spacing Between Live
Parts of
Opposite Polarity
Spacing Between Live Parts and
Grounded Parts or Enclosures,
Through Air and Over Surface @ 600V
Through Air
@ 600V
Over Surface
@ 600V
508A Feeder Circuits, Table
10.2
1” 2” 1”
508A Branch Circuits, Table
10.1
3/8” 1/2” 1/2”
UL 1995 HVAC 3/8” 1/2” 1/2”
Note: Refer to specic UL standards for complete spacing details.
Edison Power Distribution Blocks
Short-Circuit Current Rated Power Distribution Blocks
We oer distinctly dierent styles of short-circuit current rated
Power Distribution Blocks and Terminal Blocks to match dierent
application needs.
• Enclosed style or Open style
• UL1953 Listed power distribution blocks or UL1059 Recognized terminal
blocks, that have dierent minimum spacing requirements.
The table below can assist in the selection of the correct series for
your application requirements.
Why are these 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))
• HVAC equipment (NEC® 440.4(B)
The above sections are 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 per Table SB4.1
UL508A. 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.
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Open Style Power Distribution Block General Specifications
Wire type 75°C* Copper
Voltage 600 VAC or VDC maximum
Mounting Surface mount
*Note: Amp Rating based on NEC table 310.16 for 75°C copper wire.
Open Type Power Distribution Blocks Selection Table
Part Number Amps Description
SCCR
Rating
Qty
Weight
[oz]
Price
PB1011 175 max 1 pole distribution block, 1 in/1 out 200 kA 1 2.8 $16.50
PB1012 175 max 2 pole distribution block, 1 in/1 out 200 kA 1 4.6 $24.00
PB1013 175 max 3 pole distribution block, 1 in/1 out 200 kA 1 6.8 $29.00
PB1041 175 max 1 pole distribution block, 1 in/4 out 200 kA 1 3.1 $24.50
PB1042 175 max 2 pole distribution block, 1 in/4 out 200 kA 1 5.2 $38.00
PB1043 175 max 3 pole distribution block, 1 in/4 out 200 kA 1 7.3 $46.00
PB3061 310 max 1 pole distribution block, 1 in/6 out 200 kA 1 10.9 $67.00
PB3062 310 max 2 pole distribution block, 1 in/6 out 200 kA 1 19.1 $79.00
PB3063 310 max 3 pole distribution block, 1 in/6 out 200 kA 1 25.5 $94.00
PB3121 310 max 1 pole distribution block, 1 in/12 out 200 kA 1 12.7 $59.00
PB3122 310 max 2 pole distribution block, 1 in/12 out 200 kA 1 21.6 $97.00
PB3123 310 max 3 pole distribution block, 1 in/12 out 200 kA 1 31.1 $135.00
PB4011 380 max 1 pole distribution block, 1 in/stud 10 kA 1 11.9 $46.50
PB4012 380 max 2 pole distribution block, 1 in/stud 10 kA 1 20.7 $75.00
PB4013 380 max 3 pole distribution block, 1 in/stud 10 kA 1 29.1 $105.00
PB5121 570 max 1 pole distribution block, 2 in/12 out 10 kA 1 13.8 $68.00
PB5122 570 max 2 pole distribution block, 2 in/12 out 10 kA 1 24.4 $108.00
PB5123 570 max 3 pole distribution block, 2 in/12 out 10 kA 1 34.7 $155.00
PB7121 760 max 1 pole distribution block, 2 in/12 out 10 kA 1 17.0 $115.00
PB7123 760 max 3 pole distribution block, 2 in/12 out 10 kA 1 44.0 $192.00
PB Series Edison Open-Style Terminal Blocks
Safety Covers for Open Power Distribution Blocks Selection Table
Part
Number
Description Qty
Weight
(oz)
Price
PBC21 Power distribution block cover for 175A open style 1-pole blocks 1 0.3 $3.75
PBC22 Power distribution block cover for 175A open style 2-pole blocks 1 0.4 $5.00
PBC23 Power distribution block cover for 175A open style 3-pole blocks 1 0.5 $6.00
PBC31 Power distribution block cover for 310A, 380A, 570A open style 1-pole blocks, and HPB106-1 1 0.9 $9.00
PBC32 Power distribution block cover for 310A, 380A, 570A open style 2-pole blocks, and HPB106-2 1 1.3 $11.50
PBC33 Power distribution block cover for 310A, 380A, 570A open style 3-pole blocks, and HPB106-3 1 1.6 $13.00
PBC71
Power distribution block cover for all 760A open style 1-pole and 3-pole blocks. 1 pole block
requires 1 cover. 3-pole block requires 3 covers
1 0.9 $13.50
Open-style terminal
blocks for cable
termination
Edison Open-style terminal blocks are a
convenient way to manage your power
distribution needs. They are engineered
to maintain an SCCR rating of 200kA with
copper conductors and an SCCR of 10 kA
for aluminium conductors, making these
distribution blocks the ideal solution to
today’s power circuit wiring needs.
Features
• Used in UL508A panels for branch circuit
applications
• Standard aluminum box connectors
accommodate copper wire.
PB401x, PB512x and PB712x series
accommodate copper or aluminum wire.
• Tin-plated aluminum connectors suitable for
copper conductors
• Available safety covers for greater
protection (purchase separately)
• Suitable for both factory and eld wiring
Ratings
• Ampere ratings up to 760 Amps
• 600 VAC or VDC
• Short Circuit Current Rating (SCCR) 200kA
with proper fusing
• Flammability: UL 94V0
Agency Approvals
• UL 1059 recognized - File E62622
Guide XCFR2
• CSA Certied: Class 6228-01, File 700489
• CE
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Short-Circuit Current Rating Data
Line Load Configuration Conductors Maximum Fuse Class and Amp**
Part
Number
Number
of Poles
Capacity* Wire Range Wire Range
Openings
per Pole
Line AWG
or
kcmil
Load AWG
or
kcmil
Class
J
(JDL)
Class
T
(A3T/ A6T)
Class RK1
(LENRK/
LESRK)
Class RK5
(ECNR/
ECSR)
SCCR
PB1011 1
175A
2/0 to 8 AWG
70 to 10 mm
2
2/0 to 8 AWG
70 to 10 mm
2
1/1 2/0 to 8 2/0 to 8 200 200 200 60 200 kA
PB1012 2
PB1013 3
PB1041 1
175A
2/0 to 8 AWG
70 to 10 mm
2
4 to 14 AWG
25 to 2.5 mm
2
1/4 2/0 to 8
4 to 12 200 200 200 60 200 kA
PB1042 2
4 to 14
175 175 100 60 100 kA
PB1043 3 200 200 100 60 50 kA
PB3061 1
310A
350 kcmil to 4
AWG
185 to 25 mm
2
4 to 12 AWG
25 to 4 mm
2
1/6 350 to 4
4 to 8
400 400 200 100 200 kA
PB3062 2 400 400 400 100 100 kA
PB3063 3 4 to 12 175 175 100 60 100 kA
PB3121 1
310A
350 kcmil to 4
AWG
185 to 25 mm
2
4 to 14 AWG
25 to 2.5 mm
2
1/12 350 to 4
4 to 8 400 400 200 100 200 kA
PB3122 2
4 to 14
175 175 100 60 100 kA
PB3123 3 175 175 100 60 100 kA
PB4011 1
380A
500 kcmil to 6
AWG
240 to 16 mm
2
One
3/8” - 16 x 1
stud
One
3/8” - 16 x 1
stud
500
One
3/8” -
16 x 1 stud
*** *** *** ***
10 kAPB4012 2
500 to 6
*** *** *** ***
PB4013 3 *** *** *** ***
PB5121 1
570A
300 kcmil to 4
AWG
150 to 25 mm
2
4 to 14 AWG
25 to 2.5 mm
2
2/12
300 4 to 14
*** *** *** ***
10 kAPB5122 2 *** *** *** ***
PB5123 3 300 to 4 4 to 14 *** *** *** ***
PB7121 1
760A
500 kcmil to 6
AWG
240 to 16 mm
2
4 to 14 AWG
25 to 2.5 mm
2
2/12 500 to 6 4 to 14
*** *** *** ***
10 kA
PB7123 3 *** *** *** ***
*Amp ratings are based on NEC® Table 310.16 for 75°C copper wire and UL508A Table 28.1
**Class G 60A or less or Class CC 30A or less fuses are suitable for all SCCRs in this table.
***Not High SCCR rated. Refer to UL508A Table SB4.1.
PB Series Edison Open-Style Terminal
Blocks Specications
UL Series Wire and Torque Range Specifications
Part
Number
Line Load
CU Wire Range Torque
lb·in [N·m]
Trim Length
in [mm]
Hex Key CU Wire Range*
Torque
lb·in [N·m]
Trim Length
in [mm]
Hex Key,
Slot, Stud
PB1011
2/0 to 8 AWG
70 to 10 mm²
110 [12.4] 0.70 [17.8] 3/16”
2/0 to 8 AWG
70 to 10 mm²
110 [12.4] 0.70 [17.8] 3/16” Hex
PB1012
PB1013
PB1041
2/0 to 8 AWG
70 to 10 mm²
120 [13.6] 0.670 [17.0] 3/16”
4 to 6 AWG, 25 to 16 mm² 35 [4.0]
0.470 [11.9] top row,
0.780 [19.8] bottom row
SlotPB1042 8 AWG, 10 mm² 25 [2.8]
PB1043 10 to 14 AWG, 6 to 2.5 mm² 20 [2.3]
PB3061
350 kcmil to 4 AWG
185 to 25 mm²
275 [31.1] 0.90 [22.9] 5/16”
4 to 6 AWG, 25 to 16 mm² 35 [4.0]
1.00 [25.4] top row
0.45 [11.43] bottom row
SlotPB3062 8 AWG, 10 mm² 25 [2.8]
PB3063 10 to 12 AWG, 6 to 4 mm² 20 [2.3]
PB3121
350 kcmil to 4 AWG
185 to 25 mm²
275 [31.1] 0.90 [22.9] 5/16”
4 to 6 AWG, 25 to 16 mm² 35 [4.0]
0.450 [11.4] top row,
0.630 [16.0] middle row,
0.920 [23.4] bottom row
SlotPB3122 8 AWG, 10 mm² 25 [2.8]
PB3123 10 to 14 AWG, 6 to 2.5 mm² 20 [2.3]
PB4011
500 kcmil to 6 AWG
300 to 16 mm²
500 [56.5] – – – – – StudPB4012
PB4013
PB5121
300 kcmil to 4 AWG
185 to 25 mm²
275 [31.1] – –
4 to 14 AWG
25 mm² to 2.5 mm²
20 [2.3] – –
PB5122
PB5123
PB7121
500 kcmil to 6 AWG
300 to 16 mm²
500 [56.5] – –
4 to 14 AWG
25 mm² to 2.5 mm²
35 [4.0] – –
PB7123
* Wire Range shown is divided based on torque rating. The full range capability spans smallest to largest listed.
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Edison Open-Style Power Distribution Blocks Dimensions
Part Number
Width Length Height
A1 A2 A3 B C D E F G H J K L
PB1011
1.06
[26.92]
1.88
[47.75]
2.60
[66.04]
2.85
[72.39]
1.75
[44.45]
0.81
[20.57]
2.25
[57.15]
0.53
[13.46]
0.31
[7.87]
0.84
[21.34]
0.31
[7.87]
0.20
[5.08]
0.42
[10.67]
PB1012
PB1013
PB1041
PB1042
PB1043
PB3061
1.96
[49.78]
3.58
[90.93]
5.20
[132.08]
4.0
[101.60]
3.32
[84.33]
1.62
[41.15]
3.37
[85.60]
0.985
[25.02]
0.310
[7.87]
0.780
[19.81]
0.250
[6.35]
Slot
0.20 [5.08] (w)
x
0.41 [10.41] (l)
Slot
0.42 [10.67] (w)
x
0.62 [15.75] (l)
PB3062
PB3063
PB3121
PB3122
PB3123
PB4011
PB4012
PB4013
PB5121
PB5122
PB5123
Note: Dimensions are in inches [millimeters]
PB Series Edison Open-Style Terminal
Blocks Dimensions
K
L
K
L
PB1011, PB1012, PB1013
PB1041, PB1042, PB1043
PB3061, PB3062, PB3063
PB3121, PB3122, PB3123
PB4011, PB4012, PB4013
PB5121, PB5122, PB5123
Part Number Minimum Enclosure Size in[mm]*
PB1011, PB1012, PB1013 16 x 16 x 6.75 [406.4 x 406.4 x 171.45]
PB1041, PB1042, PB1043 16 x 16 x 6.75 [406.4 x 406.4 x 171.45]
PB3061, PB3062, PB3063 24 x 20 x 6.75 [609.6 x 508 x 171.45]
PB3121, PB3122, PB3123 24 x 20 x 6.75 [609.6 x 508 x 171.45]
PB4011, PB4012, PB4013 N/A
PB5121, PB5122, PB5123 N/A
PB7121, PB7123 N/A
*Note: Terminal block SCCR determined based on testing in minimum-size enclosure
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Part
Number
A Dimension
in[mm]
PBC31 2.10 [53.34]
PBC32 3.72 [94.49]
PBC33 5.34 [135.64]
Edison Open-Style Power Distribution Blocks Dimensions
Part Number
Width Length Height
A B C1 C2 C3 D E F G H J K L
PB7121
5.5
[139.7]
4.75
[120.7]
3.10
[78.74]
5.79
[147.1]
8.48
[215.39]
2.93
[74.42]
2.69
[68.33]
1.55
[39.37]
0.38
[9.65]
1.19
[30.23]
0.44
[11.18]
Slot: 0.20 [5.08] (w)
x
0.33 [8.38](l)
Slot: 0.41 [10.41](w)
x
0.53 [13.46](l)
PB7123
Note: Dimensions are in inches [millimeters]
Optional Cover for
PB1011, PB1012, PB1013
PB1041, PB1042, PB1043
Optional Cover for
PB3061, PB3062, PB3063
PB3121, PB3122, PB3123
PB4011, PB4012, PB4013
PB5121, PB5122, PB5123
PB Series Edison Open-Style Terminal
Blocks Dimensions
PB7121, PB7123
Covers
PBC71
Optional Cover for
PB7121 and PB7123
Part
Number
A Dimension
in[mm]
PBC21 0.94 [23.88]
PBC22 1.75 [44.45]
PBC23 2.56 [65.02]
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Edison Power Distribution Blocks Quick Reference
Openings per
pole
Type 175 amps 310 amps 380 amps 570 amps 760 amps
1 in
1 out
Open UL1059 PB101x NO NO NO NO
Open UL1953 Listed HPB101-x HPB101-x NO NO NO
Finger Safe UL1953 Listed EPDB101 EPDB301 NO NO NO
1 in
1 stud out
Open UL1059 NO NO PB401x NO NO
Open UL1953 Listed HPB10S-x NO NO NO NO
Finger Safe UL1953 Listed NO NO NO NO NO
2 in
2 out
Open UL1059 NO NO NO NO NO
Open UL1953 Listed NO NO NO NO NO
Finger Safe UL1953 Listed NO NO NO NO EPDB702
1 in
4 out
Open UL1059 PB104x NO NO NO NO
Open UL1953 Listed HPB104-x HPB104-x NO NO NO
Finger Safe UL1953 Listed EPDB104 NO NO NO NO
1 in
6 out
Open UL1059 NO PB306x NO NO NO
Open UL1953 Listed HPB106-x HPB306-x NO NO NO
Finger Safe UL1953 Listed NO NO EPDB306 NO NO
1 in
9 out
Open UL1059 NO NO NO NO NO
Open UL1953 Listed NO HPB309-x NO NO NO
Finger Safe UL1953 Listed NO NO NO NO NO
1 in
12 out
Open UL1059 NO PB312x NO NO NO
Open UL1953 Listed NO HPB312-x NO NO NO
Finger Safe UL1953 Listed NO NO NO NO NO
2 in
12 out
Open UL1059 NO NO NO PB512x PB712x
Open UL1953 Listed NO NO NO NO NO
Finger Safe UL1953 Listed NO NO NO EPDB512 NO
Edison Open-Style Power Distribution
Blocks Quick Reference
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