19.12
ELECTRICAL
SYSTEM
DESIGN
ENGINEERING UTILITIES 1
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | BICOL UNIVERSITY
Outlines
PRELIMINARY DESIGN
GUIDELINES
LAUDRY AREAS
BASIC DESIGN
CONSIDERATION
HALLS/CORRIDORS
DESIGN GUIDELINES
FOR COMMON SPACES
STAIRWAYS
BUILDING EXTERIOR
UTILITY ROOMS
COMMON AREAS AND
LIVING ROOMS
FOOD
PREPERATION/KITCHEN/C
OOKING AREAS
SLEEPING
AREAS/BEDROOMS
BATHROOMS/RESTROOMS
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
SHOP/GARAGES
STORAGE
ROOMS/CLOSETS
ELECTRICAL/TELECOM
MUNICATIONS
CLOSETS
INTRODUCTION
WHAT IS ELECTRICAL SYSTEM DESIGN?
Electrical System Design is the
design of electrical systems. This can
be as simple as flashlight cell
connected through two wires to
alight bulb or as involved as the
Space Shuttle.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
PRELIMINARY DESIGN GUIDELINES
Before actually beginning the design layout of the project, the designer will need to accumulate
certain information:
Determine whether electrical service is available at the site, and what type of system voltage is
available (e.g., 120/240 V AC, 1-3W, 208 Y/120 V AC, 3-4W, and so forth).
Obtain a list from the owner of all the types and locations of equipment and appliances to be
used in the building that will require electricity.
Work with the architectural designer to best locate all of the electrical equipment and
appliances on the floor plan.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
PRELIMINARY DESIGN GUIDELINES
Review with the architect where the basic mechanical equipment (e.g., HVAC and plumbing), the
service entrance equipment, the power and lighting panels, and the conduit or cable will be
located.
Discuss with the owners any future plans for changing or expanding the facilities (e.g.,
remodeling, constructing additions or other buildings, future equipment requirements) and
anything else that could potentially affect the size and location of the electrical service.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
BASIC DESIGN CONSIDERATION
In electrical design there are numerous possible solutions. Experience guides the designer to a
solution that best suits the needs of the building occupant. The designer achieves a good solution
by:
• Observing and evaluating existing installations and adapting them to meet the project
requirements
• Applying electrical systems theory
• Applying Code requirements.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
DESIGN GUIDELINES FOR COMMON SPACES
Convenience Outlets and Switches
The number and type of lighting outlets should be fitted to the various seeing tasks.
All convenience receptacles on 15 A and 20 A general purpose circuits should be of the
grounding type, minimizing the hazard of shock from short circuits.
GFCI protection should be provided on convenience receptacles where required by local code.
AFCI protection should be used on convenience receptacles where required by local code
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
DESIGN GUIDELINES FOR COMMON SPACES
Convenience Outlets and Switches
All rooms that have more than one entrance should be equipped with multiple-switch controls
(e.g., two-way or three-way switching) at each principal entrance.
Wall switches should be located at the lockset or latch side of doors or at the traffic side of
arches, and within the room or area where the lighting outlets are located.
Convenience receptacles in living rooms, bedrooms, dining areas, and other habitable spaces
should be placed. Preferably, convenience receptacles should be located near the ends of a wall
space,
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
BUILD EXTERIOR
One or more lighting outlets should be located at or near all exterior entrances.
For each single-family dwelling, at least one duplex receptacle shall be installed
outdoors to be readily available from ground level. Weatherproof convenience
receptacles should be provided on exterior walls for outside work. GFCI protection
is required for outdoor receptacles.
One or more outlets may be required for exterior equipment
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
COMMON AREAS AND LIVING ROOMS
Outlets for ambient and task lighting should be provided. General illumination
outlets should be wall switch controlled.
Convenience receptacles in living areas should be placed so that no point along the
floor line in any usable wall space is more than 6 ft (0.6 m) from a receptacle outlet
in that space.
One or more receptacles for entertainment equipment should be provided at
bookcases, shelves, or other suitable locations.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
COMMON AREAS AND LIVING ROOMS
When general illumination is to be provided from portable lamps, then at least two
separate wall-switched plug-in positions should be provided.
An outlet for a fireplace may be required.
A smoke detector/alarm on a 120 V circuit should be considered.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
FOOD PREPERATION/KITCHEN/COOKING AREAS
Lighting design should provide for ambient and local/task illumination of the work
areas, sink, range, counters, and tables.
Special purpose receptacles should be provided for all fixed appliances A small
appliance circuits for kitchen countertops should be provided
The following convenience receptacles should be connected to small appliance
circuits:
a. one receptacle for each 2 linear ft (0.6 m) of work surface face.
b. At least one receptacle to serve each separate work surface. Any counterspace
wider than 12 in should have a convenience receptacle
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
FOOD PREPERATION/KITCHEN/COOKING AREAS
Convenience receptacles serving countertop areas (e.g., except behind refrigerator
and those serving fixed appliances) should be GFCI protected.
A smoke detector/alarm on a 120 V circuit should be considered.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
BATHROOMS/RESTROOMS
Lighting sources at the mirror should be capable of illuminating both sides of the face.
At least one GFCI-protected receptacle within 3 ft of the outside edge of each lavatory
basin should be provided.
A wall-switched or timer-operated, built-in ventilating fan capable of providing a
minimum of 8 to 10 air changes per hour per water closet (50 cfm/water closet) should
be provided where no natural ventilation through windows is included.
Wall switches should be located so as not to be readily accessible while standing in the
tub or shower stall.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
LAUNDRY AREAS
Outlets for fixed lights should be installed to provide illumination of work areas,
such as laundry tubs, sorting tables, washing, ironing, and drying centers.
In the laundry area, one 20 A receptacle for the clothes washer and a special
receptacle for the clothes dryer are required.
One outlet and one switch for a ventilation fan should be provided
A smoke detector/alarm on a 120 V circuit should be considered.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
HALLS/CORRIDORS
Ceiling fixtures should be installed for proper illumination of the entire area with particular
attention paid to irregularly shaped spaces.
Convenience receptacles in hallways within a dwelling unit should be placed so that no point in
the hallway shall be more than 10 ft (1.0 m) from a duplex receptacle as measured by the shortest
path that the supply cord of an appliance connected to the receptacle would follow without
passing through an opening fitted with a door (the “vacuum-cleaner” rule).
In entrance foyers, convenience receptacles should be placed so that no point along the floor
line in any usable wall space is more than 10 ft (3.1 m) from a receptacle in that space.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
STAIRWAYS
Fixed wall or ceiling lighting outlets should be installed to provide adequate
illumination of each stair flight.
Outlets should be so arranged that the stair system can be fully illuminated from
either floor.
A smoke detector/alarm on a 120 V circuit should be considered at the top of the
stairs.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
UTILITY ROOMS
. Lighting outlets should be placed to illuminate the furnace/boiler area and work
area.
Convenience receptacles should be provided.
Outlets should be provided for each piece of mechanical equipment requiring
electrical connections such as the boiler, chiller, furnace, water pump, or
compressor.
A special purpose outlet may be required for an electricresistance water heater,
and/or an electric-resistance furnace.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
SHOPS/GARAGES
Lighting outlets should be placed to illuminate the work areas.
At least one duplex receptacle should be provided for each space in a garage or carport.
Convenience outlets should be provided at workbenches. In garages or near water, these outlets
should be GFCI-protected
. Outlets should be provided for automatic overhear (garage) door operators in the ceiling above
each bay.
Special purpose outlets should be provided for special equipment such as air compressors, welding
equipment, tire changer, dust collection equipment, machining equipment (e.g., table saws, drill
presses, milling machines, lathes, machining centers), and so on.
A smoke detector/alarm on a 120 V circuit should be considered.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
STORAGE ROOMS/CLOSETS
Generally, one lighting outlet for each large closet or storage room should be
provided. Where shelving or other conditions make the installation of lights within
a closet ineffective or unsafe, convenience receptacles in the adjoining space
should be so located as to provide light within the closet.
Wall switches or automatic door switches are preferred, but pull switches are
acceptable
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
ELECTRICAL/TELECOMMUNICATIONS CLOSETS
Lighting outlets should be placed to illuminate the area.
A minimum of two dedicated convenience receptacles on separate circuits is
required.
Rooms should be located away from sources of electromagnetic interference (e.g.,
transformers, motors, x-ray equipment, induction heaters, arc welders, radios, radar
systems, and so forth).
Emergency power should be considered and supplied.
A smoke detector/alarm on a 120 V circuit should be considered.
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY
THANK YOU!
PRESENTATION BY: CANTES & VELASCO | BSCE-3D | ENGINEERING UTILITIES 1 | BICOL UNIVERSITY