Page 55 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS

Fluxes shown above 1, 2 and 3 are not recommended for electrical purpose. They are highly corrosive, hygroscopic
and the residues are electrically conductive.
Soldering techniques
1 Tinning the soldering iron.
2 Cleaning the parts to be soldered.
3 Applying the flux
4 Applying the solder.

Methods of soldering
1 Soldering with soldering iron
2 Soldering with soldering gun.
3 Soldering with flame.

4 Dip soldering.
5 Machine soldering.
6 Soldering with pot and ladle.
1 Soldering with soldering iron
This is the most commonly and widely used soldering method. It is simple & inexpensive.

Steps in soldering

1 Clean the surface to be soldered
2 Applying flux on the surface
3 Heat the joint using soldering iron
4 Keep the solder over the surface

5 Solder melts and spread over the surface
Rating of soldering iron

Voltage 6 12 24 50 110 230/240
Wattage 25 25 25 25 25,75,250 5,10,25,75,125,250,500

Soldering bit

Soldering bits are made of copper. It is of two types
1 Iron plated
2 Un-plated
Care of the bit: Un plated bits become pitted quickly and get covered in oxide. If the iron is in constant use this will
occur within a few hours. To make good soldered joint bit must be maintained clean, smooth and correctly shaped.

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CITS : Power - Electrician & Wireman - Lesson 5 - 12