Blocks and Holders
145
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Blocks and Holders
© 2005 Littelfuse • POWR-GARD™ Products Catalog
In-Line Watertight Fuseholders
TO
LOAD
TO
SOURCE
ELECTRICAL TAPE
Littelfuse 600 volt in-line watertight fuse holders are the ideal answer
for all high humidity and corrosive environments where fuses are
required. Available in both breakaway and non-breakaway, single and
double pole versions, these fuseholders allow maximum flexibility for
any application.
Applications
Street, alley, and parking lot lighting
Security and perimeter lighting
Traffic signals
Outdoor illuminated signs
Sports lighting
Boat electrical circuits
Tractors and yard equipment
General outdoor circuit protection
Benefits
• Safety — Permits individual fixture or device to be disconnected from
circuit for servicing. Eliminates possibility of shock.
• Individual fixture fusing — Prevents loss of one fixture through
accident, vandalism, or end of life from darkening the entire circuit.
• Simplifies maintenance — Being able to immediately identify the one
faulted fixture eliminates testing the entire circuit, speeds repair, and
allows the individual unit to be serviced while the rest of the circuit is
functioning.
• Reduces damage from fault — Can prevent faulted ballast or other
failure from severely damaging fixture or device, reducing necessary
repair or need of replacement.
Features
• Watertight — Internal O-ring provides watertight seal.
• Superior terminal seals — Ultrasonically-welded terminals provide
maximum strength and eliminate leaking at terminals.
• Break resistant — Fiberglass reinforced polymer body resists damage
from dropping or impact much better than phenolic look-alikes.
• Flexible terminations — Accommodates a wide range of stranded or
solid copper or aluminum conductors. Terminations are available for
one or two conductors, with either crimp or screw terminals.
• One-pole and two-pole models available to accommodate all system
voltages up to 600V.
Specifications
Voltage rating: 600 Volts
Ampere rating: 30 amperes
200,000 amperes rms symmetrical (with Class CC fuses)
Approvals:
LEB/LEX series: UL Recognized Miscellaneous
Fuseholder per UL 512 (File No. E14721)
CSA Certified per C22.2, No. 39 (File No. LR7316)
LEC/LEY series: UL Listed Class CC Branch Circuit
Fuseholder per UL 512 (File No. E14721)
CSA Certified per C22.2, No. 39 (File No. LR7316)
Mating fuses
LEB/LEX series: Accepts all 1 1⁄2” x 13⁄32” Midget and Class CC fuses
Littelfuse types BLF, BLN, FLM, FLQ, KLK, KLKD, KLKR,
KLDR and CCMR.
LEC/LEY series: Accepts only Class CC fuses.
Littelfuse types KLKR, KLDR and CCMR.
Blocks and Holders
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Blocks and Holders
© 2005 Littelfuse • POWR-GARD™ Products Catalog
One-pole LEB and LEC Fuseholders
Basic single-pole LEB and LEC watertight fuseholders provide
protection for a variety of circuits. LEB fuseholders accept all
13/32” x 11/2” midget fuses providing supplemental overcurrent
protection. LEC fuseholders are UL Listed Class CC fuseholders
which accept only Class CC fuses and meet National Electrical Code
requirements for branch circuit protection. The most common use for
either fuseholder is for protection of lighting circuits. However, consider
them wherever there is a need for secure in-line protection, from boat
circuits to electric wheelchairs. Great flexibility is achieved when the
basic holders are combined with breakaway receptacles, Y-terminals
and insulating boots.
Two-pole LEX and LEY Fuseholders
LEX and LEY fuseholders are intended for use on line-to-line circuits up
to 600 volts and are ideal for line-to-line loads such as 240 or 480 volt
ballasts. When the line and load sections of LEX and LEY fuseholders
are separated, or when the fuseholder is removed from a two-pole
breakaway receptacle, both lines are disconnected simultaneously. This
prevents the possibility of shock from backfeeding through an exposed
fuse, which could happen with single-pole fuseholders. The LEX holder
is a two-pole version of the LEB and accepts midget fuses, providing
supplementary overcurrent protection. The LEY holder is a two-pole
version of the LEC, which accepts only Class CC fuses, and may be
used to provide branch circuit protection. Both fuseholders may be
equipped with Y-terminals, breakaway receptacles and insulating boots.
One-pole LET Solid Neutral Disconnects
The LET solid neutral disconnect is designed for use as a no-load
non-fused disconnect. Similar in design to the LEB series fuseholders,
the LET is easily identified by its all white body. Internally, it has
a permanently installed solid tin-plated copper neutral slug which
eliminates the possibility of placing a fuse in the neutral side of the
circuit. Fusing the neutral side causes a safety hazard and also violates
the National Electrical Code. The LET is available in both breakaway and
non-breakaway configurations with a wide variety of terminations.
Breakaway Feature
Littelfuse LEB, LEC, and LET single-pole fuseholders and LEX and LEY
two-pole fuseholders are available with an optional breakaway feature
required to meet state and federal highway commission standards
requiring fuseholders to readily disconnect from the line in case of
a pole knockdown. The breakaway feature consists of a receptacle
permanently attached to the power line and a fuseholder with matching
terminals. When knockdown occurs, the parts separate readily. The
breakaway receptacle terminal is deeply recessed so that energized
parts are not exposed. The fuse remains safely enclosed inside the now
de-energized watertight fuseholder. After the pole has been reinstalled,
the fuseholder is easily plugged into the receptacle, immediately
restoring service. The breakaway feature may also be used in marinas,
travel trailer parks and other locations
where circuits subjected to strain
must be safely disconnected.
In-Line Watertight Fuseholders
LEB/LEC
LEX/LEY
LET
Breakaway
Blocks and Holders
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Blocks and Holders
© 2005 Littelfuse • POWR-GARD™ Products Catalog
In-Line Watertight Fuseholders
Insulating Boots
Molded from engineering grade thermoplastics, the
WPB1 and WPB2 provide a high resistance to cor-
rosive environments and deliver a watertight seal.
Boots are supplied as standard with all breakaway
versions. Weatherproof boots WPB1 and WPB2
can be purchased separately for all non-breakaway
holders. Part number WPB1 contains one standard
boot for use with A, B, C, D, or J termination. Part
number WPB2 contains one Y-pole boot for use with
the Y-pole termination. For watertight protection
of non-breakaway Y-pole fuseholders, order one
WPB1 and one WPB2 boot. For non-breakaway
double-pole LEX and LEY holders with A, B, C, D,
or J terminations, order four WPB1 boots. These
insulating boots are designed to fit snugly onto wire
insulation, but for best results with varying wire
insulation sizes, a tape wrap should be completed.
A & B Crimp
Terminal
C & D Crimp
Terminal
J Terminal
Y Terminal
4.5"
10.3"
( ASSEMBLED LENGTH )
5.4"
( ASSEMBLED LENGTH )
4.5"
9.3"
( ASSEMBLED LENGTH )
WPB1 BOOT
(OPTIONAL)
WPB1 BOOT
(OPTIONAL)
INSULATING BOOT
(STANDARD)
INSULATING BOOT
(STANDARD)
4.2"
4.5"
9.3"
( ASSEMBLED LENGTH )
10.3"
( ASSEMBLED LENGTH )
5.3"
( ASSEMBLED LENGTH )
Terminal Size T&B Part No. Burndy Part No.
A WT161M –
B WT161M MR4C
C WT115A Hypress Y34A
D WT115A Hypress Y34A
Recommended Crimping Tools
The following crimping tools or equivalents may be used on either the
non-breakaway or breakaway watertight in-line fuseholders.
Ordering Information
To order Littelfuse in-line fuseholders and disconnects by part number,
refer to the charts on the next page.
LEB - AA - S
Type
Load Side/Term Size
Breakaway Feature
Line Side/Term Size
Fuseholder Type Description
LEB One-pole in-line fuseholder for Midget and Class CC fuses
LEC One-pole in-line fuseholder for Class CC fuses
LET One-pole in-line solid neutral disconnect
LEX Two-pole in-line fuseholder for Midget and Class CC fuses
LEY Two-pole in-line fuseholder for Class CC fuses
Blocks and Holders
148 www.littelfuse.com
Blocks and Holders
© 2005 Littelfuse • POWR-GARD™ Products Catalog
In-Line Watertight Fuseholders
Selection Guide For Single Pole LEB/LEC Fuseholders
Standard
Part No.
Breakaway
Part No. Fuse Type
Load Terminal Selection Line Terminal Selection
Terminal
Type
Load
Terminal
Wire Size
Range
No. of
Wires per
Terminal
Solid
Wire
Stranded
Wire
Terminal
Type
Line
Terminal
Wire Size
Range
No. of
Wires per
Terminal
Solid
Wire
Stranded
Wire
LEB-AA
LEC-AA
LEB-AA-S
LEC-AA-S
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#12 to #8 1 X X
#12 2 X X #12 2 X X
LEB-AB
LEC-AB
LEB-AB-S
LEC-AB-S
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#10 2 X X
#12 2 X X #6 1 X X
#4 1 — X
LEB-AC
LEC-AC
—
—
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#8 2 X X
#12 2 X X #4 1 — X
LEB-AD
LEC-AD
—
—
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#6 2 X X
#12 2 X X #2 1 — X
LEB-AJ
LEC-AJ
LEB-AJ-S
LEC-AJ-S
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Set-Screw
#12 to #8 1 X —
#12 2 X X #10 to #2 1 — X
LEB-AYC
LEC-AYC
LEB-AYC-S
LEC-AYC-S
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#12 2 X X #10 to #2 1 — X
LEB-BA
LEC-BA
LEB-BA-S
LEC-BA-S
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Crimp
#12 to #8 1 X X
#6 1 X X #12 2 X X
#4 1 — X
LEB-BB
LEC-BB
LEB-BB-S
LEC-BB-S
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Crimp
#10 2 X X
#6 1 X X #6 1 X X
#4 1 — X #4 1 — X
LEB-BC
LEC-BC
—
—
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Crimp
#8 2 X X
#6 1 X X #4 1 — X
#4 1 — X
LEB-BD
LEC-BD
—
—
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Crimp
#6 2 X X
#6 1 X X #2 1 — X
#4 1 — X
LEB-BJ
LEC-BJ
LEB-BJ-S
LEC-BJ-S
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Set-Screw
#12 to #8 1 X —
#6 1 X X #10 to #2 1 — X
#4 1 — X
LEB-BYC
LEC-BYC
LEB-BYC-S
LEC-BYC-S
Midget
Class CC
Copper
Crimp
#10 2 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#6 1 X X #10 to #2 1 — X
#4 1 — X
LEB-CA
LEC-CA
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Crimp
#12 to #8 1 X X
#4 1 — X #12 2 X X
LEB-CB
LEC-CB
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Crimp
#10 2 X X
#4 1 — X #6 1 X X
#4 1 — X
LEB-CC
LEC-CC
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Crimp
#8 2 X X
#4 1 — X #4 1 — X
LEB-CD
LEC-CD
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Crimp
#6 2 X X
#4 1 — X #2 1 — X
LEB-CJ
LEC-CJ
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Set-Screw
#12 to #8 1 X X
#4 1 — X #10 to #2 1 — X
LEB-CYC
LEC-CYC
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#4 1 — X #10 to #2 1 — X
LEB-DA
LEC-DA
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Crimp
#12 to #8 1 X —
#2 1 — X #12 2 X X
LEB-DB
LEC-DB
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Crimp
#10 2 X X
#2 1 — X #6 1 X X
#4 1 — X
LEB-DC
LEC-DC
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Crimp
#8 2 X X
#2 1 — X #4 1 — X
LEB-DD
LEC-DD
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Crimp
#6 2 X X
#2 1 — X #2 1 — X
LEB-DJ
LEC-DJ
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Set-Screw
#12 to #8 2 X X
#2 1 — X #10 to #2 1 — X
LEB-DYC
LEC-DYC
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#2 1 — X #10 to #2 1 — X
LEB-JJ
LEC-JJ
LEB-JJ-S
LEC-JJ-S
Midget
Class CC
Copper
Set Screw
#12 to #8 1 X —Copper
Set-Screw
#12 to #8 1X —
#10 to #2 1—X#10 to #2 1— X
LEB-JYC
LEC-JYC
LEB-JYC-S
LEC-JYC-S
Midget
Class CC
Copper
Set Screw
#12 to #8 1 X —“Y” Type
Copper
Set-Screw
#12 to #8 1X —
#10 to #2 1—X#10 to #2 1— X
Blocks and Holders
149
www.littelfuse.com
Blocks and Holders
© 2005 Littelfuse • POWR-GARD™ Products Catalog
Standard
Part No.
Breakaway
Part No. Fuse Type
Load Terminal Selection Line Terminal Selection
Terminal
Type
Load
Terminal
Wire Size
Range
No. of
Wires per
Terminal
Solid
Wire
Stranded
Wire
Terminal
Type
Line
Terminal
Wire Size
Range
No. of
Wires per
Terminal
Solid
Wire
Stranded
Wire
LEX-AA
LEY-AA
LEX-AA-S
LEY-AA-S
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#12 to #8 1 X X
#12 2 X X #12 2 X X
LEX-AB
LEY-AB
LEX-AB-S
LEY-AB-S
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#10 2 X X
#12 2 X X #6 1 X X
#4 1 — X
LEX-AC
LEY-AC
—
—
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#8 2 X X
#12 2 X X #4 1 — X
LEX-AD
LEY-AD
—
—
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#6 2 X X
#12 2 X X #2 1 — X
LEX-AYC
LEY-AYC
LEX-AYC-S
LEY-AYC-S
Midget
Class CC
Copper
Crimp
#12 to #8 1 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#12 2 X X #10 to #2 1 — X
LEX-BA
LEY-BA
LEX-BA-S
LEY-BA-S
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Crimp
#12 to #8 1 X X
#6 1 X X #12 2 X X
#4 1 — X
LEX-BB
LEY-BB
LEX-BB-S
LEY-BB-S
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Crimp
#10 2 X X
#6 1 X X #6 1 X X
#4 1 — X #4 1 — X
LEX-BC
LEY-BC
—
—
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Crimp
#8 2 X X
#6 1 X X #4 1 — X
#4 1 — X
LEX-BD
LEY-BD
—
—
Midget
Class CC
Copper
Crimp
#10 2 X X Copper
Crimp
#6 2 X X
#6 1 X X #2 1 — X
#4 1 — X
LEX-BYC
LEY-BYC
LEX-BYC-S
LEY-BYC-S
Midget
Class CC
Copper
Crimp
#10 2 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#6 1 X X #10 to #2 1 — X
#4 1 — X
LEX-CA
LEY-CA
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Crimp
#12 to #8 1 X X
#4 1 — X #12 2 X X
LEX-CB
LEY-CB
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Crimp
#10 2 X X
#4 1 — X #6 1 X X
#4 1 — X
LEX-CC
LEY-CC
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Crimp
#8 2 X X
#4 1 — X #4 1 — X
LEX-CD
LEY-CD
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Crimp
#6 2 X X
#4 1 — X #2 1 — X
LEX-CJ
LEY-CJ
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X Copper
Set-Screw
#12 to #8 1 X —
#4 1 — X #10 to #2 1 — X
LEX-CYC
LEY-CYC
—
—
Midget
Class CC
Copper
Crimp
#8 2 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#4 1 — X #10 to #2 1 — X
LEX-DA
LEY-DA
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Crimp
#12 to #8 1 X X
#2 1 — X 12 2 X X
LEX-DB
LEY-DB
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Crimp
#10 2 X X
#2 1 — X #6 1 X X
#4 1 — X
LEX-DC
LEY-DC
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Crimp
#8 2 X X
#2 1 — X #4 1 — X
LEX-DD
LEY-DD
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Crimp
#6 2 X X
#2 1 — X #2 1 — X
LEX-DJ
LEY-DJ
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X Copper
Set-Screw
#12 to #8 1 X —
#2 1 — X #10 to #2 1 — X
LEX-DYC
LEYDYC
—
—
Midget
Class CC
Copper
Crimp
#6 2 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#2 1 — X #10 to #2 1 — X
LEX-JJ
LEY-JJ
LEX-JJ-S
LEY-JJ-S
Midget
Class CC
Copper
Set-Screw
#12 to #8 1 X — Copper
Set-Screw #12 to #8 1 X —
#10 to #2 1 — X 1 — X
In-Line Watertight Fuseholders
Selection Guide For Double Pole LEX/LEY Fuseholders
Blocks and Holders
150 www.littelfuse.com
Blocks and Holders
© 2005 Littelfuse • POWR-GARD™ Products Catalog
In-Line Watertight Fuseholders
Selection Guide For Solid Neutral LET Fuseholders
Standard
Part No.
Breakaway
Part No. Fuse Type
Load Terminal Selection Line Terminal Selection
Terminal
Type
Load
Terminal
Wire Size
Range
No. of
Wires per
Terminal
Solid
Wire
Stranded
Wire
Terminal
Type
Line
Terminal
Wire Size
Range
No. of
Wires per
Terminal
Solid
Wire
Stranded
Wire
LET-AA LET-AA-S Solid
Neutral
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#12 to #8 1 X X
#12 2 X X #12 2 X X
LET-AB LET-AB-S Solid
Neutral
Copper
Crimp
#12 to #8 1 X X Copper
Crimp
#10 2 X X
#12 2 X X #6 1 X X
#4 1 — X
LET-AYC LET-AYC-S Solid
Neutral
Copper
Crimp
#12 to #8 1 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#12 2 X X #10 to #2 1 — X
LET-BA LET-BA-S Solid
Neutral
Copper
Crimp
#10 2 X X Copper
Crimp
#12 to #8 1 X X
#6 1 X X #12 2 X X
#4 1 — X
LET-BB LET-BB-S Solid
Neutral
Copper
Crimp
#10 2 X X Copper
Crimp
#10 2 X X
#6 1 X X #6 1 X X
#4 1 — X #4 1 — X
LET-BYC LET-BYC-S Solid
Neutral
Copper
Crimp
#10 2 X X “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#6 1 X X #10 to #2 1 — X
#4 1 — X
LET-JJ LET-JJ-S Solid
Neutral
Copper
Set-Screw
#12 to #8 1 X — Copper
Set-Screw
#12 to #8 1 X —
#10 to #2 1 — X #10 to #2 1 — X
LET-JYC LET-JYC-S Solid
Neutral
Copper
Set-Screw
#12 to #8 1 X — “Y” Type
Copper
Set-Screw
#12 to #8 1 X —
#10 to #2 1 — X #10 to #2 1 — X
Terminal Selection Guide
Terminal Designation Terminal Description Number of Wires per Terminal Wire Range Wire Type
A Copper Crimp 1
2
#12-#8
#12
Solid/Stranded
Solid/Stranded
B Copper Crimp
2
1
1
#10
#6
#4
Solid/Stranded
Solid/Stranded
Stranded
C Copper Crimp 2
1
#8
#4
Solid/Stranded
Stranded
D Copper Crimp 2
1
#6
#2
Solid/Stranded
Stranded
J Copper Set Screw 1
2
#12-#8
#10-#2
Solid
Stranded
Y (2 terminals) “Y” Style Copper Set Screw 1
1
#12-#8
#10-#2
Solid
Stranded
