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TAP
CRIMP
ELECTRO-TIN
PLATED
CRIMP
RUN
CRIMP
Features and Benefits
• Manufactured from seamless high conduc-
tivity electrolytic copper tubing with heavy
duty wall thickness.
Provides maximum conductivity, low
resistance and ductility for an excellent
combination of electrical and crimp
forming properties.
• Long barrel design on all three (3) legs.
Provides for an additional crimp or
indent with almost twice the pull out
strength properties as a standard length
barrel plus a connection that will oper-
ate cooler under heavy loading.
* Use adapter PUADP-1 with U Dies in Y46 HYPRESS™.
** Use with appropriate W Dies (see page O-29).
The maximum size for the Y35 is 400 kcmil.
• Contact factory for conductor combinations not shown.
See tooling section of this catalog for complete tool and
die listings.
• Long barrel permits the use of the Y-R
reducers.
Affords total flexibility and versatility for
virtually any conductor combination.
• Electro-tin plated.
Provides durable long-lasting corrosion
resistance.
• Barrel diameter closely matches commer-
cial (code) cable and Navy cable diameters.
Provides an excellent relationship of the
conductor/ connector combination to
produce a high quality electrical con-
nection with the recommended tooling.
TYPES YST
UNINSULATED T
COPPER HYTEE™ COUPLER
UL Listed 90° C,
600 Volts to 35 kV
Type YST copper compression tee is
designed for connecting a run conductor
with a perpendicular tap conductor.
YST connectors are commonly used in junc-
tion boxes and manholes to make a radial
tap off a main run. They are needed in many
industrial, utility generation and commercial
applications. The most common cable com-
binations are listed below. BURNDY
®
Type
Y-R reducers can be used to accommodate
most cable combinations.
For applications greater than 2000 Volts consult cable
manufacturer for voltage stress relief instructions.
Note:
All dimensions shown are for reference only.
Installation Tooling
Dieless
Run Conductors
Tap Conductors
Code •
(# of crimps)
Y35,
Y39, Y750, Y46*
Y35,
Y39, Y750, Y46*
Catalog
Conductors
Dimensions
Mechanical
Hydraulic Die Number Color
Die
Die Number Color
Die
Wire Length
Number
Run
Tap B BB H L (# of crimps)
HYTOOL™ HYPRESS™ (# of crimps) Code Index (# of crimps) Code Index
Run Tap
YST4C4C
4 str.
4 str.
1.44 1.38 1.72 3.25
U4CRT (2)
Gray 8 or 346 U4CRT (2)
Gray 8 or 346 1-3/16 1-3/16
YST2C2C
2 str.
2 str.
1.56 1.56 1.98 3.56
U2CRT (2)
Brown
10
U2CRT (2)
Brown
10
1-5/16 1-5/16
YST2525
1/0 str.
1/0 str.
1.62 1.56 1.91 3.81
Y81KFT (1)
MY29-3 (2)
U24RT (2)
Pink 12 or 348 U25RT (2)
Pink 12 or 348 1-7/16 1-7/16
YST2626
2/0 str.
2/0 str.
1.69 1.67 2.18 3.94
Y81KFTMBH (1)
MY29-11 (2)
U26RT (2)
Black
13
U26RT (2)
Black
13
1-9/16 1-9/16
YST282C
4/0 str.
2 str.
1.75 1.50 2.12 3.94
PAT81KFT-18V (1)
MD6 (4) **
U28RT (2)
Purple
15
U2CRT (2)
Brown
10
1-11/16 1-5/16
YST2825
4/0 str.
1/0 str.
1.75 1.56 2.25 4.00
MD7 (4) **
U28RT (2)
Purple
15
U25RT (2)
Pink 12 or 348 1-11/16 1-3/16
YST2828
4/0 str.
4/0 str.
1.75 1.75 2.44 4.19
Y644HS (1)
U28RT (2)
Purple
15
U28RT (2)
Purple
15
1-11/16 1-11/16
YST2929
250 kcmil 250 kcmil 1.75 1.78 2.53 4.25
U29RT (2)
Yellow 16
U29RT (2)
Yellow 16
1-11/16 1-11/16
YST3131
350 kcmil 350 kcmil 2.31 2.25 3.12 5.50 Y81KFT (2)
U31RT (4)
Red 18 or 324 U31RT (4)
Red 18 or 324
2
2
YST3428
500 kcmil
4/0 str.
2.56 1.75 2.81 5.81 Y81KFTMBH (2)
U34RT (4)
Brown 20 or 299 U28RT (2)
Purple
15
2-5/16 1-11/16
YST3434
500 kcmil 500 kcmil 2.25 2.70 3.76 6.19 PAT81KFT-18V (2)
U34RT (4)
Brown 20 or 299 U34RT (4)
Brown 20 or 299 2-5/16 2-5/16
YST3939
750 kcmil 750 kcmil 3.46 3.34 4.64 8.12
U39RT (4)
Black 24 or 473 U39RT (4)
Black 24 or 473 2-15/16 2-15/16
Blue highlighted items are industry standard and most frequently ordered.
Canada: 1-800-387-6487
www.burndy.com
US: 1-800-346-4175
C-108
Compression Connections
BURNDY
®
Copper Compression — T-Coupler