Technology and Livelihood Education- electrical Installation and maintenance ( Exploratory )

1. Electrical Wiring
Diagram

2. A. Pictorial diagram is a sketch of
electrical circuit that shows the
external appearance of each
component. It is much like a
photograph of the circuit and uses
simple images of parts

3. Schematic diagram is a sketch showing
the components of the circuit using
standard electrical symbols. It shows
the actual number of components and
how the wiring is routed but not the
actual location

4.  C. Types of Circuit
 1. Series Circuit is a circuit in which lamps are arranged in a chain, so that the
current has only one path to take. The current is the same through each load.
Example of this is the Christmas lights. It consists of a number of bulbs that are
connected side by side to meet the voltage requirement which is 220 volts for
alternating current

5.  2. Parallel Circuit is a circuit in which lamps are connected across the wires. The
voltage across each load on parallel circuit is the same. The advantage of using
parallel circuit is that even if one of the lamps fails, still the remaining lamps will
function.

6.  Electrical plan is a graphical presentation of electrical wiring connections to
install in a particular house or building. It indicates the position of electrical
fixtures such as convenience outlets, switches, lightings, door bells, and
others to be installed.