basic electrical drawing

Basic Electrical Drawings are the blueprint that make electrical work easy and which also serve as a guide when working on a new construction.

Electrical Symbols

Electricians must be able to correctly read and understand electrical working drawings which include symbols and how they are used. In some cases, the symbols are a combination of pictographs and abbreviations.

An electrical symbol is a figure or mark that stands for a component used in the electrical systems and electrical drawing are the blueprint that make electrical work easy.
Architectural Drawings:
Working drawings consist of plans, elevations, details, and other information necessary for the construction of a building.

An architectural drawing usually includes:

1. A site (plot) plan indicating the location of the building on the property.
2. Floor plans showing the walls and partitions for each floor or level.
3. Elevations of all the exterior faces of the building.
4. Several vertical cross sections indicating clearly the various floor levels and details of the footings, foundations, walls, floors, ceilings, and roof construction.
5. Large-scale detail drawings showing such construction details as may be required.

The key points electrical drawings for Basic Electrical Drawings are:

Electrical drawings are prepared by architects and engineers. These drawings provide specific instructions to electricians working on a particular job.
It is important that an electrician interprets the drawings accurately before commencing work, i.e., before installing conduits, pulling wires, or mounting electrical equipment.
Electrical drawings include a site plan, floor plans, details drawings, schedules.
Detailed information consisting of lines, symbols, and notations is used to convey an engineer’s design to electricians.
A one-line diagram shows the path of an
electrical circuit or system of circuit along with the various components.
Electrical symbols is a combination of

abbreviations and meaning

A/D Converter
Analog to digital. Specifically: A/
D converter, a circuit that converts
analog signals into a stream of
digital data.

Alternating current: A signal
or power source that varies
with time, switching polarities.
Typically, sinusoidal and constant

Access Flooring
A flooring system in which
modular panels are raised above
the floor slab, typically on 3
to 12″-high supports. Electrical
conduit and data cabling are
routed beneath the flooring
panels and connected to floor
monuments (raised or flush).
This type of flooring system can
provide efficient access to wires
and cables and can in some
instances simplify reconfiguration.

Specifies the nearness of the
measured value from the true

Adjacent (alternate)-channel
power ratio.

Advanced Configuration
and Power Interface:
An industry-standard
specification (co-developed
by Hewlett-Packard, Intel,
Microsoft, Phoenix, and Toshiba)
for operating-system-directed
power management for laptop.
desktop, and server computers. A
replacement for APM.

Reciprocal of impedance. Ratio of
the electric current to the voltage.
Unit: Siemen’s or SI.

Asymmetric Digital Subscriber
Line: A method for moving data
over regular phone lines. An ADSL
circuit carries much more data
than a modem can encode on a
regular phone connection. ADSL
rides on the regular phone wires
coming into the subscriber’s
premises (twisted pair copper).

Study of air moving around solid
objects, or air flowing around a
stationary structure.

Amplitude Modulation: A
modulation method in which the
carrier amplitude changes with
the input signal amplitude.

Automatic Gain Control: A circuit
that modulates an amplifier’s
gain, in response to the relative
strength of the input signal, in
order to maintain the output


An electrical symbol is a figure or mark that stands for a component used in the electrical systems and electrical drawing are the blueprint that make electrical work easy.

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