35mm diameter strands
which collectively make the 10mm2
cross-sectional area the cable. this chapter, will look practical application for that sci-
ence, electrical cables.
Most cables can considered constructed three parts: the
conductor which must suitable cross-section carry the load cur-
rent; the insulation, which has colour number code for identification;
and the outer sheath which may contain some means providing protec-
tion from mechanical damage. Solid conductors are only used fixed wiring instal-
lations and may shaped larger cables.
. Stranded conductors are more
flexible and conductor sizes from 4.
Conductors above 25mm2
have more than seven strands, depending upon
the size the cable.
Fixed cable core colours 2006
● Single-phase supplies red line conductors, black neutral conductors,
and green combined with yellow for earth conductors.
These core colours must not used after March 2006.
A 10mm2
conductor, for example, has seven 1.0 25mm2
contain seven strands.
On March 2004, the IEE published Amendment No. 7671: 2001
which specified new cable core colours for all fixed wiring electrical
installations.
New (harmonized) fixed cable core colours
● Single-phase supplies brown line conductors, blue neutral conduct-
ors and green combined with yellow for earth conductors (just like
flexible cords).
● Three-Phase supplies red, yellow and blue line conductors, black neu-
tral conductors and green combined with yellow for earth conductors. Flexible cords have multiple strands very fine wire, as
fine one strand human hair. These were remain red for live
or phase conductor, black for the neutral conductor and green combined
with yellow for earth conductors. However, similar harmonization was proposed for non-
flexible cables used for fixed wiring.
Definition
Cables can considered con-
structed three parts: the conductor
which must suitable cross-
section carry the load current;
the insulation, which has colour or
number code for identification; and
the outer sheath which may contain
some means providing protection
from mechanical damage.
The conductors cable are made either copper aluminium and may
be stranded solid. These new core colours will ‘harmonize’ the United Kingdom
with the practice mainland Europe.Basic Electrical Installation Work
124
Electrical cables
In Chapters and looked the science behind conductors and insu-
lators.
New wiring colours
Twenty-eight years ago the United Kingdom agreed adopt the European
colour code for flexible cords, that is, brown for live phase conductor,
blue for the neutral conductor and green combined with yellow for earth
conductors. This gives the cable its very flexible quality
