1. COURSE NAME – BUILDING SERVICES
COURSE CODE – ARC 310
WIRING SYSTEM
SUBMITTED TO :-
AR. KIRANPREET KAUR
SUBMITTED BY :-
MANISHA BISHT
B. ARCH 4TH SEM
2. WIRING SYSTEM
• Electrical wiring is an electrical installation of
cabling and associated devices such as switches,
distribution boards, sockets, and light fittings in
a structure. Wiring is subject to safety standards
for design and installation.
• Electrical wiring is the electrical power distribution through
the wires in a perfect manner for economic use
of wiring conductors inside a room or building with better
load control.
3. SYSTEM OF WIRING
• State electricity board provide electric
supply up to a point outside the consumer
premises. From this point consumer take the
connection to his main board . Insulated
electrical wires will be taken out to various
places in the permises to supply power to
different type of loads like lights , fans ,
refrigerators , room coolers , heaters, etc.
4. Points to be considered for
selection of wiring
• Initial cost: It should be economical.
• Durability: It must be able to withstand wear and tear due to weather.
• Safety from fire: It should be free from risk of fire as far as possible.
• Mechanical protection: It must provide mechanical protection to the
cables.
• Permanency : The wiring must not be affected by the action of
weather, fumes, dampness, chemical etc.
• Appearance: The appearance should be good enough to view.
• Accessibility: It should be easy to extend or repair the wiring.
• Life: The system should have good life time.
• Maintenance cost: It should be low.
5. Wiring types according to need
Industrial wiring
Domestic wiring
Commercial wiring
wiring
7. CLEAT WIRING
• In this system of internal wiring the cables used either VIR or PVC
types.
• The cables are held by porcelain cleats about 6 mm above the walls or
ceiling.
• It is a temporary wiring system, therefore making it unsuitable for
domestic premises.
• It is the oldest wiring.
• It permitted on systems up to 440V or 600V.
• Its life time is approximately 5 Years.
• This system is not used in damp walls or ceilings.
8. Wooden casing and
capping wiring
• The casing consists of V-shaped grooves (usually two to hold
the cables of opposite polarity in different groves).
• It is covered at the top by means of rectangular strip of wood,
known as capping of same width as that of casing.
• The cables used in this type of wiring are either VIR or PVC or
any approved insulated cables.
9. CTS or TRS or PVC
Sheath wiring
• In this kind of wiring Single core or double core or three
core TRS cables with a circular oval shape cables are used.
Mostly, single core cables are
preferred.
• TRS cables are chemical
proof, water proof, steam proof,
but are slightly affected by
lubricating oil.
• It is cheaper than other
types of wiring except
cleat wiring.
10. Lead sheathed or metal
sheathed wiring
• This type of wiring employs conductors insulated with VIR
and is covered with an outer sheath of lead-aluminum alloy
containing about 95% lead.
• This metal sheath gives protection to the cable from
mechanical injury, dampness and atmospheric corrosion.
• Its life is long earth continuity is maintained throughout.
• It is can be used in situations exposed to rain sun provided no
joint is exposed.
11. Conduit wiring
• Conduit wiring is a system where the cables are enclosed in metal
or plastic tubes .
• The conductors have insulation which is rated at the voltage
required but gives no mechanical protection.
• Surface conduit wiring is used in industries to connect the
heavy motors.
• Concealed wiring is the most popular and common method of
wiring the residential buildings.