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Multi-Conductor Cable: Cotton-Covered, Waxed and Twisted
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14. Oktoba 2026DK
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Multi-Conductor Cable: Cotton-Covered, Waxed and Twisted

A cable of several insulated wires in one bundle, such as the four leads of a strain-gauge bridge. Each copper wire is wrapped in cotton thread and soaked in beeswax, then the wires are twisted together and covered again.
Mwanzo
An afternoon

Maagizo

1

Cut the conductors

Cut one copper wire per conductor (four for a bridge), a little longer than the cable.

Vifaa kwa hatua hii:

Waya wa ShabaWaya wa Shaba4 length

Zana zinazohitajika:

Koleo la kumenya wayaKoleo la kumenya waya
2

Wrap each wire in cotton

Clamp one end in the vise and the other in the hand drill's chuck, keeping it taut. Wind cotton thread on in a close spiral with no gaps, then a second layer the opposite way.

Vifaa kwa hatua hii:

Uzi wa PambaUzi wa Pamba1 as required

Zana zinazohitajika:

Kibano cha meza ya kaziKibano cha meza ya kazi
Kekee cha mkonoKekee cha mkono
MkasiMkasi
3

Soak in beeswax

Melt beeswax in a double boiler and draw each covered wire slowly through it. Wipe off the excess and let it set.

Vifaa kwa hatua hii:

Nta ya NyukiNta ya Nyuki1 as required

Zana zinazohitajika:

Sufuria ya kupikia kwa mvuke wa majiSufuria ya kupikia kwa mvuke wa maji
Sahani ya Kupasha JotoSahani ya Kupasha Joto
4

Twist them together

Lay the covered wires side by side, clamp one end and twist them together evenly with the drill.

Zana zinazohitajika:

Kibano cha meza ya kaziKibano cha meza ya kazi
Kekee cha mkonoKekee cha mkono
5

Cover the bundle

Wind an outer layer of cotton over the twisted bundle and wax it again.

Vifaa kwa hatua hii:

Uzi wa PambaUzi wa Pamba1 as required
Nta ya NyukiNta ya Nyuki1 as required

Zana zinazohitajika:

Kibano cha meza ya kaziKibano cha meza ya kazi
Sufuria ya kupikia kwa mvuke wa majiSufuria ya kupikia kwa mvuke wa maji
Sahani ya Kupasha JotoSahani ya Kupasha Joto
6

Test it

Strip the ends. With a multimeter check each wire end to end, and check that no two wires touch.

Zana zinazohitajika:

Koleo la kumenya wayaKoleo la kumenya waya
Kipima-umeme cha aina nyingiKipima-umeme cha aina nyingi
7

Limits

Cotton insulation is only good for low temperatures, up to about 105 °C (Wikipedia, Magnet wire), and for dry places and low voltages such as instrument leads. The method is general workshop practice, ours.

Vifaa

3
  • 1
    Waya wa Shaba
    4 length
    Kishikilia Nafasi
  • 25
    Uzi wa Pamba
    2 as required
    Kishikilia Nafasi
  • 35
    Nta ya Nyuki
    2 as required
    Kishikilia Nafasi

Zana Zinazohitajika

7

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