The document provides specifications for electrical and plumbing symbols used in schematic drawings. It includes symbols for lighting fixtures like ceiling downlights and wall lights, switches, air conditioners, distribution boards, and more. Regulations are presented for safely installing conductors, switches, and protecting apparatus from external factors. Plumbing guidelines specify installing hot water systems, traps, vent pipes, and preventing drainage systems from being used as vents. Roof drainage and preventing dampness in buildings is also addressed.

1. Symbol Specification
Distribution board
Ceiling downlight
Floor recessed light
Wall mounted light
Ceiling Fan
Exhaust fan
240V switch outlet
Symbol Specification
Split unit air conditioner
Air conditioner switch
One gang switch
Two gang switch
Three gang switch
Two way switch
Wiring circuit
Ceiling fan Ceiling
downlight
Exhaust
Fan
Wall
mounted
light
Split unit
air
conditioner
Three gang
switch
Distribution
board
Switch outlet Floor
recessed
light
Electricity Regulations 1994
Regulation 15. Apparatus, conductor, accessory, etc.
(2) A conductor shall be insulated and effectively protected or so placed or safeguarded in such a manner as to prevent danger.
(6) Any conductor or apparatus that is exposes to the weather, water, corrosion, undue heating or used in inflammable
surroundings or in an explosive atmosphere shall be constructed or protected in such a manner as to prevent danger.
Regulation 16. Switch, switchfuse, fuse switch, circuit breaker, contractor, fuse,
etc.
(1) Any switch, switchfuse, fuse switch, circuit breaker or isolating link shall be—
(a) constructed, placed or protected in such a manner as to prevent danger;
(b) constructed and adjusted in such a manner as to and maintain efficient contact;
(c) provided with an efficient handle insulated from the system and arranged in such a manner that the handle cannot
inadvertently touch any live part;
(d) constructed or arranged in such a manner that it cannot accidentally come into contact with any live conductor when left in
the "off" position;
Reasoning:
To prevent any electricity leakage, short circuit or unwanted accident by exposing the conductor or apparatus to external factors.
To ensure the safety of users by insulating the conductor or switch handles that might be in contact with users.
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To distribute electrical power from the main power
source to individual circuits or outlets and has a
main circuit breaker that cuts off electrical current
when excess current or short circuit is present.

2. Uniform Technical Guidelines Water Reticulation and Plumbing 2014
C.3.6 Hot Water System
a. Hot water apparatus shall not draw water directly from a service pipe.
b. Hot water apparatus installed in landed residential properties, or other premises having
dedicated storage tanks and served by a single water meter, can draw water directly from the
storage cistern.
e. Cold water supplied to a heating apparatus shall be controlled by a stop valve, and shall be
discharged within the heating apparatus at a level above the overflowing level of the
apparatus (air gap provision). This condition may be waived in the case when the discharge
from the heating apparatus is in open air or through a mixing valve.
Uniform Building By-Laws 1984 ACT 133
84. (1) Suitable measures should be taken to prevent the penetration of dampness and
moisture into a building.
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Street, Drainage And Building Act 1974
61. Ventilating pipes to sewers.
(1) The local authority may erect or fix to any building such pipes as are necessary for the proper ventilation of the drains and sewers belonging to it.
(2) Such pipes shall be erected so as not to occasion any nuisance or inconvenience to such building or any building in the neighbourhood.
Reasoning:
To ensure vent stack is installed properly to prevent foul smell in building or to nearby buildings.
Gate Valve Water meter Water filter Stopcock valve
Floor trap S-trap
To trap sediments and
particles from sink.
Manhole
To allow maintenance
and connecting piping
for sewer and drainage.
Vent pipe crown
To direct smell to
roof level
Gully trap
To prevent foul smell
from sewer entering
kitchen.
Vent Stack
Floor trap
Manhole
Pipe diameter
Gully trap
S-trap
Stopcock valve
Water meter
Gate Valve
Hot water tank
Stainless steel water storage tank
Water filter
Non-return valve
To control the water
flow to the water
outlet or water
apparatus especially
during maintenance.

3. Street, Drainage And Building Act 1974
57. Water pipes, etc., not to be used as ventilating shafts.
(1) No water-pipe, stack-pipe or down spout used for conveying surface water from any premises shall be used or be permitted to serve or to act as a
ventilating shaft to any drain or sewer.
Uniform Building By-Laws 1984 ACT 133
115. All roofs of buildings shall be so constructed as to drain effectually to suitable and sufficient channels, gutters, chutes or troughs which shall be provided in
accordance with the requirements of these By-Laws for receiving and conveying all water which may fall on and from the roof.
Reasoning:
Due to the tropical climate, all measures against the heavy precipitation is required to ensure the building does nor leak and can channel the rainwater
efficiently.
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Reference:
Energy Commission. (1994). ELECTRICITY REGULATIONS 1994. Retrieved from
http://www.st.gov.my/index.php/policies/regulations/electricity-regulations-1994.html
Laws of Malaysia Act 133 Uniform Building By-Laws. (2006). Kuala Lumpur: MDC Publisher Sdn. Bhd.
National House Buyers Association. (n.d.). STREET,DRAINAGE AND BUILDING ACT 1974 ACT 133 PART III. Retrieved from
http://www.hba.org.my/laws/street/partIII.htm
Rongey, D. (n.d.). Wiring Diagrams Fully Illustrated. Retrieved from http://www.ask-the-electrician.com/wiringdiagrams.html
Saltzman, R. (2012, June 5). A Primer on “S” Traps. Retrieved from http://www.structuretech1.com/2012/06/a-primer-on-s-traps/
Suruhanjaya Perkhidmatan Air Negara. (2014). Uniform Technical Guidelines Water Reticulation and Plumbing. Retrieved from
http://www.span.gov.my/
BUILDING SERVICES (ARC 2423)
Project 2 – Application of Building Services
Perimeter drain
To direct surface
water and falloff
from roof to
drainage.
Drain Sump Stainless steel
rainwater head
Gutter and downpipe
To transfer water from roof to
ground drainage system.
100mm diameter Downpipe
Drain sump
Stainless Steel rainwater head
250mm perimeter drain
An average of 2% slope for flat
concrete roof is required to ensure
the rainwater can be direct to
downpipe.
For roof area below 70 sqm.,
100mm gutter sizing is adequate.