Page 262 - Electrician - TT (Volume 2)

ELECTRICIAN - CITS

These heaters are of two types:
A Bowl-type room heater, and
B Rod-type room heater.

A room heater consists of an element, a reflector and a base plate. The element of the bowl-type room heater is
wound over a cone-shaped or tubular-shaped porcelain insulator with two-pin bases as shown in figure A
The element of the rod-type room heater is wound over the china clay insulating rod. These heating rods may be
either plug-in type or screw-in type as shown in figure B

Soldering iron
It consists of a copper bit, wooden handle and an element embedded in the copper bit This element heats up
the copper bit of the soldering iron and for its easy handling a wooden handle is provided. The soldering irons
are generally of 65, 125 and 250 VV, 230 volts and are used for soldering wire joints, commutator segments, etc

4 Air circulator
It consists of a fan motor of 1/60 hp, 2400 rpm, two elements of 1000 W each and a special rotary switch which
can make contact with all the terminals of the switch at a time when required.
The fan circulates the cool air into the room when the switch makes contact at first posi-tion. At second position
the fan delivers low heat and similarly at the third position maximum heat. The essential parts and connection are
shown in Fig. It is only suitable for operating on 230 V ac and takes either 1000 or 2000 W.

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CITS : Power - Electrician & Wireman - Lesson 101-103