Electrical Insulating Filler Tape KC78

High tensile strength and bonding strength.
Suitable for irregular shapes cable with good elongation.
Ensuring high quality seal over a wide range of temperatures.
Physical and electrical properties are unaffected by the degree of stretch.
Self-fusing tape.
Good chemical resistance, weather resistance and corrosion resistance.
Excellent ageing properties.
Excellent electrical properties.
Operation and installation easily.

Cotran Brand KC78 Electrical Insulation Filler Tape is a conformable, flexible, self-fusing butyl-based, waterproofing mastic tape. It provides excellent resistance to varying weather, aging, and it also provides excellent adhesion to metals, cable insulations and jacket. This product can be used in sealant as a waterproofing filler for low voltage cable terminations and joints. 


Applications

◆ To insulate low-voltage (below 600V) connections.
◆ To build up cable splices and fill out major irregularities and voids in low-voltage splices (below 2300V).
◆ To create a uniform base in irregular cable end for further overwrapping.
◆ To smooth bus bar irregularities.
◆ To be a moisture seal at grounding wire.
◆ To be a sealant with excellent adhesion to cable jackets and other insulating materials.


Test Parameters

No.

Test Item

Result

Test Method

1

Color

Black

 

2

Thickness

3.18mm

 

3

Tensile Strength

3.72N/10mm

ASTM D1000

4

Elongation at Break

>602%

ASTM D1000

5

Insulation resistance

1.53x1013 Ώ.cm

ASTM D1000

6

Copper corrosion

None

ASTM D69


Installation

Cotran Brand KC78 eletrical insulation filler tape should be applied in successive half-lapped, level-wound layers until desired build-up is reached.

Step 1 Wipe off the dusts on the splice area before wrapping.

 

Step 2 Remove the liner and stretch the tape to 1 to 2 times of its original length, apply the tape in 50%-lapped with mastic side toward area to the wrapped. Stretching the tape to 4 times of its original length is not recommended.

 

Step 3 Finish breaking the tape by holding it with your thumb and stick the end well.

 

Step 4 AfterKC78 electrical insulation filler tape is applied, overwrapping COTRAN PVC insulation tape is recommended, apply 3 layers of COTRAN PVC insulation tape in a 50% overlapping with no tension. Make sure not to overstretch the PVC tape during installation.

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Specification

Size

ACSR (mm2)

AAAC (mm2)

AAC (mm2)


A

(mm)

B

(mm)
Conductor Diameter Range in / (mm)

ASTM-B232

ASTM-B399
ASTM-B231

AS4 (GL-402A) 16 16 16 349 21.2 0.229-0.265/(5.81-6.73)
AS2 (GL-404A)
25 25 25 349 21.2 0.265-0.335/(6.73-8.5)
AS42 (GL-4042A)

35

35 35 349 21.2 0.229-0.340/(5.81-8.63)
AS4210 (GL-406A)
50 50 50 413 29.2 0.280-0.397/(7.11-10.08)
AS1020 (GL-4076A)
70 70 70 413 29.2 0.365-0.475/(9.27-12.06)
AS30 (GL-408)
95 95 95 559 44.2 0.502-0.531/(12.75-13.48)
AS3040 (GL-4098)
120 120 120 559 44.2 0.502-0.585/(12.75-14.86)
AS40266 (GL-410)


150 150 150 559 44.2 0.532-0.641/(13.51-16.28)
AS266336 (GL-411)
150 150 150 559 44.2 0.580-0.724/(14.73-18.38)
AS397 (GL-412)
185 185 185 686 50.8 0.740-0.815/(18.80-20.7)
AS477 (GL-413)


240 240 240 820 56.9 0.810-0.881/(20.57-22.38)
AS636 (GL-414)
300 300 300 879 63.0 0.885-1.003/(22.48-25.47)




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