Types L, O & S
L – 1.16" (29.46mm), O – 1.86" (47.24mm),
Features:
Heavy Load Termination Flexibility
– Designed for
machine, switchboard and other heavy load terminations.
Readily Adaptable to Special Applications
– Can be used
for branch circuit termination with simple modification of
standard terminal plate.
Combined Style Design Capability
– All types can be
combined with each other as well as with Types H and BT.
Ratings and Wire Sizes to Match High Current Needs
– Type L is rated at 100A/600V, UL recognized for wire up
to No. 1AWG. Type O is rated 125A/600, UL recognized
for wire up to No. 1/0AWG. Type S is rated 225A/600V, UL
recognized for wire up to No. 4/0AWG. (Note: UL requires
the use of UL recognized lugs.)
Recognition and Listing
– UL recognized and CSA certified
High Voltage/Current
TYPE L
TERMINAL DESIGNATIONS
L
O
Nickel-plated brass terminal bar with 1/4" – 20 plated
round-head steel screws. Accepts wire up to No. 1AWG.
Nickel-plated brass terminal bar with 5/16" – 18 plated
slotted hex-head steel screws. Accepts wire up to No.
1/0AWG.
Nickel-plated brass terminal bar with 3/8" plated hex-head
steel screws. Accepts wire up to No. 4/0AWG.
Recognized under the Components Program of
Underwriters Laboratories, Inc. Standard 1059,
Guide No. XCFR2, File No. E62557.
Guide No. 184-N-90, Report No. LR39186-1.
S
BARRIER STYLE
TYPE O
Types L, O & S Terminal Dimensions
O.D.
M.D.
5/16 – 18
1.875
(47.62)
1/4 – 20
3/8 – 16
1.00
(25.4)
TYPE S
1.500
(38.1)
2.500
(63.5)
Terminal Variations
.842
(21.43)
.750
(19.05)
1.00
(25.4)
.218 x .375 Lg. Mtg. Holes
(5.53) x (9.52)
L
O
S
NOTE: Lugs are not
funished with blocks
mm dim. are shown
in parentheses
L
terminal bar and
1/4" round-head
screw, max. lug
width – 27/32"
O
terminal bar and
5/16" slotted hex-
headscrew, max.
lug width – 3/4"
S
terminal bar and
3/8" slotted hex-
headscrew, max.
lug width – 1"
50
www.curtisind.com
Curtis Industries
A Division of Powers Holdings, Inc.
ci c tions su ct to c n .
Dimensions are shown for
reference purposes only.
S – 2.42" (61.47mm) Center-to-Center Spacing
e i
ations:
How to Order
Types L, O and S terminal blocks are ordered by listing a
model number made up of the series designation followed by
the number of terminals required for the application.
Example: a 4-pole terminal block becomes L-4, 0-4 or S-4
When ordering combinations of both types, the model
number is made up of both series designations followed by
total number of poles and number of each type. A model
number of two L terminals followed by two O terminals thus is
converted to stock number LO-4 (2L, 2O).
Combining these types with types T, U, S, H and BT would
follow the same ordering format. (Note: When combined with
types H or BT, a special adapter is required.)
Mounting
Dimensions
Inches
Metric
(mm)
Overall
Dimensions
Inches
Metric
(mm)
Type L
Wire Range:
L – UL Recognized for No. 1AWG
O – UL Recognized for No. 1/0AWG
S – UL Recognized for No. 4/0AWG
No. of Terminals:
L – 1 thru 12
O – 1 thru 4
S – 1 thru 4
Voltage Rating:
600V CSA and UL
Tightening Torque:
L – 50 in.-lb.
O – 50 in.-lb.
S – 200 in.-lb.
Current Rating:
L – 100A, O – 125A, S – 225A
Housing:
Material
Phenolic
Continuous Use
Temp. (UL Index)
150°C (302°F)
Flammability Rating
94V-1
Water Absorption
(24 hrs. % wt. gain) 0.5%
Chemical Resistance
Resistant to most organic solvents
Breakdown Voltage:
L
O
S
Terminal - Terminal
11,000V Typ. 10,900V Typ. 10,400V Typ.
Terminal - Ground
9,700V Typ. 10,300V Typ. 10,500V Typ.
Note:
Speci cations contained herein are sub ect to change
without notice.
High Voltage/Current
Number of
Terminals
1
2
3
4
5
6
7
8
9
10
11
12
2.183
3.342
4.500
55.46
84.88
114.31
2.683
3.842
5.000
68.16
97.58
127.0
5.659 143.73
6.817 173.16
7.976 202.59
9.134 232.01
11.451 290.86
12.610 320.29
6.159 156.43
7.317 185.86
8.476 215.29
9.634 244.71
BARRIER STYLE
10.293 261.44 10.793 274.14
11.951 303.56
13.110 332.99
13.768 349.71 14.268 362.41
14.927 379.14 15.427 391.84
Mounting
Dimensions
Inches
Metric
(mm)
Overall
Dimensions
Inches
Metric
(mm)
Series L, O & S Accessories
COVERS
Types T and U – Plain cover of 1/16" thick bakelite is perma-
nently positioned to block with two screws. Factory-assem-
bled or customer-installed.
To order, specify:
L – Part No. 268A158 – 1 thru 12 terminals
O – Part No. 268A159 – 1 thru 4 terminals
S – Part No. 268A160 – 1 thru 4 terminals
Type O
Number of
Terminals
1
2
3
4
2.880
73.16
3.380
85.86
4.736 120.29
6.591 167.42
8.447 214.55
Mounting
Dimensions
Inches
Metric
(mm)
5.236 132.99
7.091 180.12
8.947 227.25
Overall
Dimensions
Inches
Metric
(mm)
Type S
Number of
Terminals
1
2
3
4
3.440
87.38
3.940 100.08
6.356 161.44
8.771 222.79
11.187 284.14
5.856 148.74
8.271 210.09
10.687 271.44
Dimensions shown are ± 0.030"
Dimensions are in inches and millimeters
unless otherwise speci ed.
Values in parentheses are metric equivalents.
Curtis Industries
A Division of Powers Holdings, Inc.
1-800-657-0853
51
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