MODULE-09-ELECTRICAL-AUXILIARY-DRAWINGS.pptx

BLT 122
BUILDING TECHNOLOGY II
AR. RONNEL CARLOS T. RAMOS
Course Facilitator
UNIVERSITY OF NORTHERN PHILIPPINES
College of Architecture

COURSE OUTLINE
BLT - BUILDING TECHNOLOGY II MODULE 09 ELECTRICAL AND AUXILIARY DRAWINGS
MODULE 01 – BASIC WORKING DRAWINGS AND
GRAPHICAL PRESENTATION TECHNIQUES
MODULE 02 – REFLECTED CEILING PLANS AND DETAILS
MODULE 03 – SCHEDULE OF DOORS AND WINDOWS
MODULE 04 – SCHEDULE OF FINISHES
MODULE 05 – KITCHEN AND T&B DETAILS
MODULE 06 – STAIR DETAILS
MODULE 07 – STRUCTURAL AND CIVIL WORK
DRAWINGS
MODULE 08 – PLUMBING AND SANITARY DRAWINGS
MODULE 09 – ELECTRICAL AND AUXILIARY DRAWINGS

MODULE 09
ELECTRICAL AND
AUXILIARY DRAWINGS
7.A. ELECTRICAL NOTES, LEGENDS & SYMBOLS,
ELECTRICAL WIRING, CONDUIT AND ACCESSORIES
7.B. ELECTRICAL, POWER AND AUXILIARY LAYOUTS
7.C. LOAD COMPUTATION AND SCHEDULE, SINGLE
LINE DIAGRAM AND RISER DIAGRAM

What is an ELECTRICAL PLAN?
It is a type of technical drawing that delivers visual
representation and describes circuits
and electrical systems. It consists of symbols and lines that
showcase the engineer's electrical design to its clients.
Also referred as “Electrical Drawing” or
“Wiring Diagram”.
Composed of Lighting and Power Layouts and other
electrical specifications.

What is an AUXILIARY PLAN?
These are components related with Security Systems,
Comfort Systems, Lighting Systems and Information
Systems witch are very important to help the main system
to perform according the specifications.
Provides supplementary or additional help and support to
the basic systems of a building
Composed of Electronic and Communications systems.
PABX – Private Automatic Branch Exchange
Also referred as “telephone system”, these are switchboards
that connect to several devices.

ELECTRICAL NOTES
REFERENCE:
PHILIPPINE ELECTRICAL CODE (PEC) Parts 1 &
2, 2017 Edition
• Based from the 2017 National Electrical
Code of USA. (NFPA 70, NEC)
• Regularly revised every three(3) years to
reflect the evolution of products, materials,
and installation techniques.
• The primary objective of the code is to
establish basic materials quality and electrical
works standards for the safe use of electricity
for light, heat, power, communications,
signaling and for other purposes.

LEGEND AND SYMBOLS

POWER SERVICE
ENTRANCE
Also referred to as “service drop”
It is where the wires connected to the load side
of the meter enter the house or building.

KILOWATT HOUR (Kwh)
METER
These are compact electronic monitoring devices
that measure the consumed energy flowing
through a circuit such as a standard 120V or
240V

ELECTRICAL PANELBOARD
Also called, “distribution board”, “breaker
panel” or “electric panel”.
It is a component of an electricity supply
system that divides an electrical power feed into
subsidiary circuits while providing a
protective fuse or circuit breaker for each circuit
in a common enclosure.

CIRCUIT BREAKER
It is an automatically operated electrical switch
designed to protect an electrical circuit from
damage caused by excess current from an
overload or short circuit. Its basic function is to
interrupt current flow after a fault is detected.
CIRCUIT HOMERUN
A home run is a wire that graphically represents
the wiring of a circuit to a central location that
acts as the distribution point for the power,
typically, a panel.

GROUND ROD /
GROUND CLAMP
Also known as grounding electrodes.
Used to connect the grounding system of
electrical systems to earth ground.
They are very good conductors of electricity and
allow any dangerous electricity to flow to
ground, taking the danger away from you and
the electrical panel.

PULL BOX FOR TELEPHONE
AND CATV
They are used along with conduit to simplify
wiring installation.
They provide a way to pull conductors at long
distances without placing excessive strain on
the wire or insulation.

SWITCHES
They are used to turn electrical current on or off for nearly any electrical device.

CONVENIENCE OUTLETS
A receptacle in a wall or baseboard for connection to lamps or other electrical appliances.

ELECTRICAL WIRING
1. THHN AND THWN
2. THW
3. TW

THERMOPLASTIC HIGH
HEAT-RESISTANT NYLON COATED
(THHN) &
THERMOPLASTIC
WATER-RESISTANT NYLON COATED
(THWN)
Suitable for wet or dry locations at temperatures
not to exceed 90 degrees Celsius or at 75
degrees Celsius when exposed to oil and
gasoline

THERMOPLASTIC HEAT AND WATER
RESISTANT INSULATED WIRE (THW)
It is a solid or stranded, soft annealed copper
conductor insulated with Polyvinylchloride (PVC).
Maximum conductor temperature does not
exceed 75 degrees Celsius, 600V

THERMOPLASTIC HEAT AND WATER
RESISTANT INSULATED WIRE (TW)
It is a solid or stranded, soft annealed copper
conductor insulated with Polyvinylchloride (PVC).
Maximum conductor temperature does not
exceed 60 degrees Celsius, 600V

BASIC ELECTRICAL CONDUITS
1. RIGID METAL CONDUIT (RMC)
2. RIGID POLYVINYL CHLORIDE (PVC)
3. FLEXIBLE POLYVINYL CHLORIDE (PVC)

RIGID METAL CONDUIT (RMC)
For outdoor applications

RIGID POLYVINYL CHLORIDE (PVC)
Used in corrosive environments
For outdoor and indoor uses, typically in walls
and slabs

FLEXIBLE POLYVINYL CHLORIDE
(PVC)
Used in corrosive environments
For indoor uses, typically in ceilings and slabs

ELECTRICAL FITTINGS
REFER TO ATTACHED PDF

LIGHTING LAYOUT
 SCALE 1:100M
 GRIDLINES
 DIMENSIONS (General and Grid to Grid)
 REFER TO RCP FOR CEILING DESIGN AND LIGHTING FIXTURE ARRANGEMENT
 WITH FIXTURE AND FURNITURE (hidden lines)
 LIGHTS AND SWITCH CONNECTIONS
 CIRCUIT HOMERUNS
 LIGHTING FIXTURE LABELS (alphabets-small caps, same letter for lights with one switch)
 SWITCH LABELS

LIGHTING LAYOUT

POWER LAYOUT
 SCALE 1:100M
 GRIDLINES
 CONVENIENCE OUTLETS WITH PROPER DESIGNATIONS
 SERVICE ENTRANCE, KILOWATT HOUR METER AND PANEL BOARD LOCATIONS
 CONVENIENCE OUTLET CONNECTIONS
 CIRCUIT HOMERUNS (single circuit for REFRIGERATOR and AIRCONDITIONING UNITS)

POWER LAYOUT

AUXILIARY LAYOUT
 SCALE 1:100M
 GRIDLINES
 TELEPHONE and CATV OUTLETS
 CCTV (if any)
 PULL BOX (TELEPHONE and CATV) and DVR LOCATIONS
 DOORBELL AND BUZZER LOCATIONS
 OUTLET CONNECTIONS

AUXILIARY LAYOUT

LOAD COMPUTATION AND SCHEDULE

WATTS PER OUTLET:
• LIGHTING OUTLET = 100W
• CONVENIENCE OUTLET = 180W
• CONVENIENCE OUTLET (REF) = 1000W
• CONVENIENCE OUTLET (1hp, ACU) = 1840W
Note: 1hp = 18 to 22sqm
FORMULAS:
• NO. OF OUTLETS PER CIRCUIT X WATTS PER OUTLET = WATTS PER CIRCUIT
• WATTS PER CIRCUIT / 230V = AMPERE LOAD
• TOTAL AMPERE LOAD X 0.80 = DEMAND FACTOR @ 80%
• DEMAND FACTOR X 1.20 = LOAD GROWTH @ 20%

ELECTRICIAN’S GUIDE TABLE

SINGLE LINE DIAGRAM
Shows a correct power distribution path from the
incoming power source to each downstream load
– including the ratings and sizes of each piece
of electrical equipment, their circuit conductors,
and their protective devices.
 NOT TO SCALE
 REPLICATE DRAWING but indicate correct
ampere trip, wire and conduit sizes as per the

RISER DIAGRAM
Two-dimensional representation in a vertical
plane the distribution components of an
electrical system such as bus risers, bus plugs,
panel boards, and transformers from the point
of entry up to the small branch circuits
on each level.
 NOT TO SCALE
 REPLICATE DRAWING but indicate correct
ampere trip and circuit loads as per the

VICINITY MAP
For reference of the concerned electric company
on the exact location of electrical tapping points.
 NOT TO SCALE
 REPLICATE VICINITY MAP in the FRONT PAGE

END OF MODULE 09

MODULE-09-ELECTRICAL-AUXILIARY-DRAWINGS.pptx

More Related Content

What's hot

Similar to MODULE-09-ELECTRICAL-AUXILIARY-DRAWINGS.pptx

Recently uploaded

MODULE-09-ELECTRICAL-AUXILIARY-DRAWINGS.pptx