Key Fact
Socket outlets
● additional 30mA RCD protection
is required for socket outlet circuits
● used ordinary people
● and intended for general use
● IEE Regulations 411.1. Socket outlets therefore provide easy
and convenient method connecting portable electrical appliances a
source supply.
Radial circuits
In radial circuit each socket outlet fed from the previous one.12.
The number permitted socket outlets unlimited but each radial circuit
must not exceed the floor area stated and the known estimated load.
Where two more circuits are installed the same premises, the socket
outlets and permanently connected equipment should reasonably
shared out among the circuits, that the total load balanced. This
Key Fact
Lighting
● Fluorescent tubes and CFLs are
energy-efficient lamps.
Socket outlets can obtained 15, 13, and ratings (see IEE Table
55.1), but the 13A flat pin shuttered type complying with 1363 the
most popular for domestic installations the United Kingdom. The length flexible cord usually longer than
2m and so, pressing the plug top into socket outlet connects the appli-
ance the source supply.
Definition
Socket outlets therefore provide an
easy and convenient method con-
necting portable electrical appliances
to source supply. Each 13A
plug top contains cartridge fuse give maximum potential protection to
the flexible cord and the appliances which serves.7).1. They cannot
always controlled dimmer switch and are unsuitable for incor-
porating automatic presence detector because they are usually not
switched long enough worthwhile, but energy-efficient lamps
are excellent for outside security lighting which left for several hours
each night.
When designing ring radial circuits special consideration should be
given the loading kitchens which may require separate circuits.3. 14. Live is
connected live, neutral neutral and earth earth each socket outlet.
.
The electrical contractor, discussion with customer, must balance the
advantages and disadvantages energy-efficient lamps compared other
sources illumination for each individual installation.1 and
415.1.Basic Electrical Installation Work
290
equivalent 60W GLS lamp. Energy-efficient lamps also have lifespan
of about eight times longer than GLS lamp and so, they use energy
very efficiently.
However, energy-efficient lamps are expensive purchase and they do
take few minutes attain full brilliance after switching on.
The fuse and cable sizes are given Appendix the IEE Regulations but
circuits may also expressed with block diagram, shown Fig.
Wiring and socket outlet circuits
Where portable equipment used should connected plug
top conveniently accessible socket outlet, taking into account the
length the flexible cord normally fitted portable equipment (IEE
Regulation 553.
Socket outlets may wired ring radial circuit and order that
every appliance can fed from adjacent and convenient socket outlet,
the number sockets unlimited provided that the floor area covered by
the circuit does not exceed that given Appendix the IEE Regulations
