p.12
Switches and Controls
What is a general use switch intended for?
For use in the general distribution and branch circuit rated in amperes.
p.17
Branch Circuit Design and Considerations
What does a Branch Circuit consist of?
1. Source voltage 2. Wiring 3. Load.
p.8
Raceway and Conduit Types
What is the purpose of conduits in electrical systems?
To protect and route electrical wiring.
p.2
Wires and Cables Classification
What is a cable?
An electrical conductor that is larger in size.
p.16
Splicing Techniques for Electrical Wires
What is the purpose of the Western Union Long-tie Splice?
To extend the length of wire for outside wiring.
p.7
Raceway and Conduit Types
What is a raceway?
An enclosed channel of metal or non-metallic materials designed for holding wires, cables, or busbars.
p.15
Splicing Techniques for Electrical Wires
What is an Aerial Tap?
It is used as a temporary tap, usually done at construction sites.
p.29
Designing an Electrical Plan for Residential Buildings
What is the purpose of legends in electrical design?
To provide a clear understanding of symbols and components used in electrical plans.
p.34
Designing an Electrical Plan for Residential Buildings
How are special outlets counted in the branch circuit?
As one branch circuit and must not be connected to convenience outlets.
p.13
Designing an Electrical Plan for Residential Buildings
What does 'P a g e | 31' refer to?
It indicates a page number in a document.
p.8
Raceway and Conduit Types
What is a key feature of conduits according to the Philippine Electrical Code?
They must meet specific standards for safety and functionality.
p.39
Designing an Electrical Plan for Residential Buildings
What should be plotted separately in the floor plan?
Lighting and convenience outlets.
p.43
Designing an Electrical Plan for Residential Buildings
What is a riser diagram?
A visual representation of the vertical distribution of electrical systems in a building.
p.16
Splicing Techniques for Electrical Wires
How does a Cross Joint differ from a plain tap?
It is a combination of two plain taps placed side by side.
p.7
Raceway and Conduit Types
What are common types of raceways for household wiring installations?
Conduits, connectors, and other accessories.
p.10
Raceway and Conduit Types
What does a junction box typically have?
A blank cover and sufficient space for connections.
p.1
Conductor and Insulator Types
Name three examples of good conductors.
Silver, Copper, and Aluminium.
p.4
Conductor and Insulator Types
What does ampacity depend on?
The conditions of use and the temperature rating of the conductor.
p.2
Wires and Cables Classification
What is a wire?
An electrical conductor that is smaller in size.
p.16
Splicing Techniques for Electrical Wires
What is the most widely used splice in interior wiring installation?
Western Union Short-tie Splice.
p.34
Designing an Electrical Plan for Residential Buildings
What should be plotted separately in the floor plan?
Lighting and convenience outlets.
p.33
Designing an Electrical Plan for Residential Buildings
What is the primary focus of designing an electrical plan?
To ensure safe and efficient electrical distribution in a building.
p.2
Wires and Cables Classification
What is a stranded wire?
Multiple wires twisted together to form a metallic string.
p.10
Raceway and Conduit Types
What is the purpose of a junction box?
To join different runs of raceway or cable, providing sufficient space for connection and branching of enclosed conductors.
p.11
Raceway and Conduit Types
Where is a pull box installed?
In one or more runs or raceway.
p.33
Designing an Electrical Plan for Residential Buildings
Why is it important to include safety regulations in an electrical plan?
To prevent electrical hazards and ensure compliance with local codes.
p.21
Overcurrent Protection Devices
Where should overcurrent protection devices be installed?
On the line or supply side of the equipment being protected.
p.33
Designing an Electrical Plan for Residential Buildings
What is a key component of an electrical plan?
The placement of outlets and switches.
p.26
Service Entrance and Electric Metering
What is the purpose of grounding in an electrical system?
To fix permanently a zero-voltage point in the system.
p.11
Outlets and Receptacles Types
What is a receptacle?
A contact device installed in an outlet for the connection of an attachment plug.
p.11
Raceway and Conduit Types
What is the purpose of a pull box?
To facilitate pulling in the conductors and may also serve to distribute the conductors.
p.20
Overcurrent Protection Devices
What is the primary purpose of protecting a branch circuit?
To protect it from overcurrent.
p.43
Designing an Electrical Plan for Residential Buildings
What is the purpose of a load schedule in electrical design?
To list the electrical loads and their specifications for proper planning and distribution.
p.9
Outlets and Receptacles Types
What is an outlet in an electrical wiring system?
A point where current is taken to supply utilization equipment.
p.7
Raceway and Conduit Types
How can conduits be classified?
As rigid metal, flexible metal, rigid non-metal, and flexible non-metal.
p.7
Raceway and Conduit Types
What is one purpose of electrical conduits?
To provide a means for running wire from one point to another.
p.21
Overcurrent Protection Devices
What is a requirement for overcurrent protective devices in underground conductors?
They shall be placed in all underground conductors of the protected circuits.
p.7
Raceway and Conduit Types
How do conduits protect wires?
By physically protecting them and providing a grounded enclosure.
p.8
Raceway and Conduit Types
Which code provides guidelines for conduits in the Philippines?
Philippine Electrical Code 2017.
p.10
Outlets and Receptacles Types
What is a special outlet?
An outlet intended for specific equipment that uses a large amount of electricity, such as air conditioning units and refrigerators.
p.35
Designing an Electrical Plan for Residential Buildings
What should be considered when creating a Power Layout Plan?
Load calculations, circuit design, and accessibility.
p.34
Designing an Electrical Plan for Residential Buildings
How should the connections of lighting and outlets be indicated?
By indicating the number of branch circuits.
p.37
Designing an Electrical Plan for Residential Buildings
What is the purpose of a riser diagram?
To visually represent the vertical distribution of electrical systems in a building.
p.1
Conductor and Insulator Types
What is an insulator?
Material used to resist the flow of current.
p.43
Designing an Electrical Plan for Residential Buildings
How does a riser diagram relate to a load schedule?
The riser diagram is drawn based on the information provided in the load schedule.
p.15
Splicing Techniques for Electrical Wires
What is a Duplex Cross Joint?
It is a two-tap wire joint turned simultaneously, used under heavy tensile stress.
p.9
Outlets and Receptacles Types
What is a lighting outlet?
An outlet intended for direct connection to a lamp holder, lighting fixture, or pendant cord terminating in a lamp holder.
p.14
Splicing Techniques for Electrical Wires
What is a Rat Tail or Pig Tail splice used for?
To join two or more conductors inside a junction box without mechanical stress.
p.26
Service Entrance and Electric Metering
What is one method of accomplishing grounding?
Connecting to a buried cold water main.
p.23
Overcurrent Protection Devices
Can a Circuit Breaker be manually tripped?
Yes, it can be manually tripped and also acts as a circuit switch.
p.14
Splicing Techniques for Electrical Wires
What are butted splices?
Splices made by joining the free ends of conductors together.
p.26
Service Entrance and Electric Metering
What is a third method of grounding?
Connecting to a buried ground plate.
p.12
Switches and Controls
How do 3-way switches differ from single pole switches?
They do not have an on/off position.
p.28
Designing an Electrical Plan for Residential Buildings
What is a riser diagram?
A schematic representation of the vertical distribution of electrical systems in a building.
p.28
Designing an Electrical Plan for Residential Buildings
What does a sample riser diagram typically illustrate?
The layout and connections of electrical components and systems in a vertical format.
p.15
Splicing Techniques for Electrical Wires
What is a Plain Tap Joint used for?
It is used where the tap wire is under considerable tensile stress.
p.1
Conductor and Insulator Types
What are the three types of conductors used in electrical systems?
Bare, Covered, and Insulated.
p.20
Overcurrent Protection Devices
What should be installed in all branch circuitries for protection?
An overall current protective device.
p.15
Splicing Techniques for Electrical Wires
What advantage does the Aerial Tap provide?
The easy twist facilitates tap wire movement.
p.12
Switches and Controls
What is the primary function of a switch in an electric circuit?
To open or close the circuitry.
p.26
Service Entrance and Electric Metering
Where is the Electric Service Meter typically installed?
Outside the building at the property line wall or electric post.
p.38
Designing an Electrical Plan for Residential Buildings
What is the primary focus when designing an electrical plan?
To ensure safe and efficient electrical distribution throughout a building.
p.29
Service Entrance and Electric Metering
What is the role of an electrical meter?
To measure the amount of electricity consumed.
p.7
Raceway and Conduit Types
How do conduits protect buildings and occupants?
By protecting them from damage caused by the electrical system.
p.18
Branch Circuit Design and Considerations
What are the two main factors affecting the reliability of electric power?
The electric utility and the building electric system.
p.22
Overcurrent Protection Devices
What happens to a fuse when there is an overcurrent?
It opens (breaks) the circuit.
p.19
Branch Circuit Design and Considerations
What is an individual branch circuit designed for?
To supply a single specific item.
p.4
Conductor and Insulator Types
What is ampacity?
The current in amperes that a conductor can carry continuously without exceeding its temperature rating.
p.1
Conductor and Insulator Types
What is a conductor?
Materials used to flow current.
p.10
Outlets and Receptacles Types
What are some examples of electrical accessories?
Junction Box, Receptacles, Pull Box, Switches.
p.33
Designing an Electrical Plan for Residential Buildings
What should be considered when designing an electrical plan?
Load calculations, circuit layout, and safety regulations.
p.16
Splicing Techniques for Electrical Wires
When is a Wrapped tap or Tee joint used?
On large solid conductors where wrapping the heavy tap wire is difficult.
p.32
Overcurrent Protection Devices
What does the Philippine Electrical Code provide for motor current ratings?
A table of motor current ratings.
p.9
Outlets and Receptacles Types
What are the different kinds of outlets?
1. Convenience outlet 2. Lighting outlet 3. Special outlet.
p.43
Designing an Electrical Plan for Residential Buildings
What key elements should be included in a riser diagram?
Electrical panels, circuits, load connections, and vertical pathways.
p.12
Switches and Controls
What are the types of switches classified under general use?
1. General use switch 2. General use snap switch 3. AC general use snap switch 4. AC-DC general use switch 5. Isolating switch 6. Motor circuit switch.
p.37
Designing an Electrical Plan for Residential Buildings
What is a key component to consider when drawing a riser diagram?
The correct representation of electrical loads and their connections.
p.23
Overcurrent Protection Devices
What is a Circuit Breaker?
An overcurrent protective device designed to function as a switch.
p.7
Raceway and Conduit Types
What is another function of conduits in relation to buildings?
To protect the wiring system from damage by the building and occupants.
p.18
Branch Circuit Design and Considerations
What does flexibility of the circuit installation refer to?
The ability to accommodate all probable pattern arrangements and locations of loads for expansion or future development.
p.22
Overcurrent Protection Devices
What is a fuse?
A current protective device with a circuit opening fusible element that opens when there is an overcurrent.
p.27
Designing an Electrical Plan for Residential Buildings
What does the Power or outlet layout in an Electrical Plan indicate?
The placement and distribution of electrical outlets and power sources.
p.23
Overcurrent Protection Devices
What is Ampere Trip (AT)?
The maximum current that a circuit breaker will trip the circuit, normally 60% to 100% of ampere frame.
p.42
Branch Circuit Design and Considerations
What size of wire is recommended for the circuit protection?
2 - 50 sq.mm THHN Cu wire + 1 - 14 sq.mm TW ground in 40 mm RSC.
p.17
Branch Circuit Design and Considerations
What is a Branch Circuit in electrical terms?
It refers to the complete path traversed by an electric current, including the entire house wiring.
p.30
Designing an Electrical Plan for Residential Buildings
What is the first step in designing an electrical plan?
Plot the lightings, convenience outlets, special outlets, and panel board in the floor plan.
p.19
Branch Circuit Design and Considerations
How should lighting and receptacles be supplied with current?
From at least two circuits to prevent total power loss if one line is out.
p.35
Designing an Electrical Plan for Residential Buildings
What is a Power Layout Plan?
A schematic representation of electrical systems and components in a building.
p.35
Designing an Electrical Plan for Residential Buildings
What does a Power Layout Plan typically include?
Locations of outlets, switches, and electrical panels.
p.35
Designing an Electrical Plan for Residential Buildings
Why is a Power Layout Plan important?
It ensures efficient distribution of electrical power and compliance with safety standards.
p.39
Designing an Electrical Plan for Residential Buildings
How should special outlets be counted in the circuit design?
As one branch circuit and must not be connected to the convenience outlet.
p.21
Overcurrent Protection Devices
What are the two main causes of overcurrent?
Overload in the equipment or conductors, and short circuit or ground fault.
p.39
Designing an Electrical Plan for Residential Buildings
What is required to indicate the number of branch circuits in the plan?
Draw the connections of lighting and outlets.
p.21
Overcurrent Protection Devices
What must overcurrent protective devices protect?
The wiring, transformer, lights, appliances, and other equipment.
p.34
Designing an Electrical Plan for Residential Buildings
What is the purpose of the lighting layout plan?
To plot the lighting and outlets in the floor plan.
p.1
Conductor and Insulator Types
Name three examples of insulators.
Rubber, Porcelain, and Glass.
p.38
Designing an Electrical Plan for Residential Buildings
What should be considered in an electrical plan design?
Load calculations, circuit placement, and safety codes.
p.25
Service Entrance and Electric Meter
What are the two types of service entrance?
Overhead service and underground service.
p.23
Overcurrent Protection Devices
What is the purpose of the automatic tripping device in a Circuit Breaker?
To protect the branch circuit from overload and ground fault.
p.38
Designing an Electrical Plan for Residential Buildings
What is a key component of an electrical plan?
The layout of outlets, switches, and fixtures.
p.21
Overcurrent Protection Devices
When can conductor size be reduced in a circuit or tap?
Unless the smallest wire is protected by the circuit overcurrent devices.
p.12
Switches and Controls
What are 3-way switches used for?
To control lights with two switches.
p.27
Designing an Electrical Plan for Residential Buildings
What information does a Riser Diagram provide in an Electrical Plan?
It illustrates the vertical distribution of electrical systems.
p.24
Fuse and Circuit Breaker Differences
What is a major advantage of a fuse over a circuit breaker?
Fuses are more reliable and stable, often lasting for years.
p.19
Branch Circuit Design and Considerations
What is a good practice regarding lighting and receptacles in a circuit?
Lighting and receptacles should not be combined in a single circuit.
p.24
Fuse and Circuit Breaker Differences
How does the cost of a fuse compare to that of a circuit breaker?
Fuses are much cheaper than circuit breakers.
p.18
Branch Circuit Design and Considerations
What should space allocation consider?
Easy maintenance, ventilation, expandability, centrality, and limited access.
p.22
Overcurrent Protection Devices
What is the characteristic of a cartridge type fuse?
It is enclosed in an insulating fiber tube.
p.22
Overcurrent Protection Devices
What is the characteristic of a plug fuse type?
It is enclosed in a porcelain cap.
p.37
Designing an Electrical Plan for Residential Buildings
What information is typically included in a load schedule?
Details about the electrical loads, including their types, ratings, and locations.
p.20
Overcurrent Protection Devices
What do overcurrent protective devices do?
They open the circuit or disconnect the line when the current rating capacity is exceeded.
p.9
Outlets and Receptacles Types
What is a convenience outlet?
A device that establishes connection between the conductor of a flexible cord and the conductors connected to the receptacle.
p.29
Service Entrance and Electric Metering
What is the function of a panel board in electrical systems?
To distribute electrical power to various circuits.
p.21
Overcurrent Protection Devices
How should all equipment be protected?
In accordance with its current carrying capacity.
p.5
Conductor and Insulator Types
Which types of conductors have a temperature rating of 75°C?
Types RHW, THHW, THW, THWN, XHHW, USE, ZW.
p.29
Outlets and Receptacles Types
What is a common feature of lighting outlets?
They are designed to connect lighting fixtures.
p.24
Fuse and Circuit Breaker Differences
What happens to a circuit breaker after it trips due to an overcurrent?
It can be reset and used again after correcting the fault.
p.38
Designing an Electrical Plan for Residential Buildings
What role do load calculations play in electrical plan design?
They determine the appropriate size and number of circuits needed.
p.24
Fuse and Circuit Breaker Differences
How can the position of a circuit breaker be easily detected?
It can be closed, tripped, or open right at the handle.
p.17
Branch Circuit Design and Considerations
What is the role of the final overcurrent device in a Branch Circuit?
It protects the circuit and connects to the outlets.
p.22
Overcurrent Protection Devices
What are the two types of fuses?
Cartridge type and plug fuse type.
p.17
Branch Circuit Design and Considerations
What is the significance of safety in circuitry design?
It prevents hazards and ensures user protection.
p.30
Designing an Electrical Plan for Residential Buildings
How is the circuit breaker size determined?
It may equal the wire ampacity or the next size lower.
p.17
Branch Circuit Design and Considerations
Why is space allocation important in circuit design?
To ensure proper installation and functionality of components.
p.41
Overcurrent Protection Devices
What multipliers are used for the largest motor load in wire size and protection?
Multiply by 0.25 for wire size and 1.5 for protection.
p.37
Designing an Electrical Plan for Residential Buildings
How does a riser diagram relate to a load schedule?
The riser diagram is drawn based on the information provided in the load schedule.
p.20
Overcurrent Protection Devices
What becomes the source of voltage in a panel board?
The busbars, when looking upstream from the overcurrent devices.
p.14
Splicing Techniques for Electrical Wires
What is splicing in electrical wiring?
The process of combining two lengths of wires so they can carry a current.
p.26
Service Entrance and Electric Metering
Why should the grounding connection not be broken or fused?
To maintain a solid and uninterrupted connection to the ground.
p.12
Switches and Controls
Where is a general use snap switch typically installed?
In flush device boxes or an outlet box cover.
p.14
Splicing Techniques for Electrical Wires
When is a Y-Splice typically used?
On small cables where the strands are flexible and can be wrapped in one operation.
p.27
Designing an Electrical Plan for Residential Buildings
What are the main components of an Electrical Plan for a residential building?
1. Power or outlet layout 2. Lighting layout 3. Riser Diagram 4. Load Schedule.
p.19
Branch Circuit Design and Considerations
What do general purpose branch circuits supply?
Outlets for lighting and appliances, including convenience receptacles.
p.24
Fuse and Circuit Breaker Differences
What is a key limitation of a fuse compared to a circuit breaker?
A fuse is a single pole device that can only protect one electric line.
p.18
Branch Circuit Design and Considerations
What does economy refer to in electrical installations?
Both the initial cost and the operating cost.
p.17
Branch Circuit Design and Considerations
What are some considerations for good circuitry design?
1. Flexibility of the circuit 2. Reliability and efficiency of service 3. Safety of the circuitry 4. Economy as to cost 5. Energy consideration 6. Space allocation.
p.30
Designing an Electrical Plan for Residential Buildings
What rule should be followed when selecting wire size?
Always choose the next size up rule.
p.36
Overcurrent Protection Devices
What type of circuit breaker is recommended?
60 AT/100AF, 2P, Bolt-On Type CB.
p.38
Designing an Electrical Plan for Residential Buildings
Why is it important to follow safety codes in electrical plan design?
To prevent electrical hazards and ensure compliance with regulations.
p.21
Overcurrent Protection Devices
What should be ensured about the assembly of overcurrent protective devices?
They should be readily assembled and protected from physical damages and away from easily ignited materials.
p.12
Switches and Controls
What is the purpose of an isolating switch?
To isolate an electric circuit from the source of power.
p.24
Fuse and Circuit Breaker Differences
How many poles can a circuit breaker have?
It can have 1, 2, or 3 poles.
p.19
Branch Circuit Design and Considerations
What is the purpose of an appliance branch circuit?
To supply outlets intended for feeding appliances.
p.23
Overcurrent Protection Devices
What is Ampere Frame (AF)?
The maximum current that a circuit breaker can withstand for a long period of time.
p.18
Branch Circuit Design and Considerations
What are the key factors to consider for energy considerations?
Energy laws, budget, energy conservation techniques, and energy control.
p.19
Branch Circuit Design and Considerations
What should not be allowed in combination with switch and receptacle outlets?
Combination switch and receptacle outlets.
p.41
Wires and Cables Classification
What rule should be followed when selecting wire size?
Always choose the next size up rule.
p.41
Branch Circuit Design and Considerations
How do you calculate the total ampere of the design?
Add all branch circuits' Volt Ampere values and divide by 230 volts.
p.24
Fuse and Circuit Breaker Differences
What dual function does a circuit breaker serve?
It acts as both a switch and an overcurrent protective device.
p.26
Service Entrance and Electric Metering
Name another method of grounding.
Connecting to a ground rod.
p.23
Overcurrent Protection Devices
What does 'Trip' or 'Tripping' refer to in electrical terms?
The cutting-off or disconnection of the current supply.
p.14
Splicing Techniques for Electrical Wires
What is a tap joint in electrical wiring?
A junction that joins a branch conductor to a continuous main wire.
p.22
Overcurrent Protection Devices
Is a fuse a one-time or reusable device?
It is a one-time protective device that must be replaced after a fault is cleared.
p.23
Overcurrent Protection Devices
What are some standard Ampere Trip sizes according to the Philippine Electrical Code?
15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600, 700, 800, 1000, 1200, 1600, 2000, 2500, 3000, 4000, 5000, 6000.
p.19
Branch Circuit Design and Considerations
What should be avoided when connecting building lights?
Connecting all building lights on a single circuit.
p.24
Fuse and Circuit Breaker Differences
What maintenance requirement does a circuit breaker have that a fuse does not?
Circuit breakers require maintenance and periodic testing due to their moving parts.
p.18
Branch Circuit Design and Considerations
What are the classifications of branch circuits?
General purpose branch circuit, appliance branch circuit, and individual branch circuit.
p.17
Branch Circuit Design and Considerations
How does reliability affect circuit design?
It ensures consistent and efficient service.
p.31
Conductor and Insulator Types
What types of conductors are listed for 75°C rating?
RHW, THHW, THW, THWN, XHHW, USE, ZW.
p.41
Branch Circuit Design and Considerations
How do you calculate the ampere value of each branch circuit?
Divide each branch's Volt Ampere by 230 Volts.
p.41
Overcurrent Protection Devices
How is the circuit breaker size determined?
It may equal the wire ampacity or the next size lower.
p.27
Designing an Electrical Plan for Residential Buildings
What is the purpose of the Lighting layout in an Electrical Plan?
To show the arrangement and types of lighting fixtures.
p.18
Branch Circuit Design and Considerations
What does safety of the circuitry imply?
Independent service can be used as backup for normal services instead of emergency equipment.
p.42
Overcurrent Protection Devices
What type of circuit breaker is suggested for use?
125 AT/200AF, 2P, Bolt-On Type CB.
p.27
Designing an Electrical Plan for Residential Buildings
What is included in a Load Schedule within an Electrical Plan?
Details about the electrical load requirements for different circuits.
p.42
Branch Circuit Design and Considerations
What is the significance of the colors in the load schedule?
They indicate how the process is done.
p.30
Designing an Electrical Plan for Residential Buildings
What is the purpose of preparing a Load Schedule?
To identify the sizes of wire and circuit breakers needed in the design.
p.36
Wires and Cables Classification
What rule should be followed when selecting wire size?
Always choose the next size up rule.
p.30
Designing an Electrical Plan for Residential Buildings
How do you calculate the ampere value of each branch circuit?
Divide the Volt Ampere of each branch by 230 Volts.
p.17
Branch Circuit Design and Considerations
Why is economy a consideration in circuit design?
To manage costs effectively while maintaining quality.
p.30
Designing an Electrical Plan for Residential Buildings
What should be done to determine the total ampere of the design?
Add all the branch circuits' Volt Ampere values and divide by 230 volts.
p.41
Raceway and Conduit Types
What should be done to determine the size of conduit?
Use the table of conduit specified in the Philippine Electrical Code (PEC).
p.22
Overcurrent Protection Devices
What does a fuse consist of?
A fusible link or wire that melts at low temperature.
p.30
Designing an Electrical Plan for Residential Buildings
How should lighting and outlets be plotted in the electrical plan?
They must be plotted in separate sheets.
p.36
Branch Circuit Design and Considerations
How do you calculate the ampere value of each branch circuit?
Divide each branch's Volt Ampere by 230 Volts.
p.17
Branch Circuit Design and Considerations
Why is flexibility important in circuit design?
It allows for adjustments and modifications as needed.
p.36
Overcurrent Protection Devices
How is the circuit breaker size determined?
It may equal the wire ampacity or the next size lower.
p.17
Branch Circuit Design and Considerations
What does energy consideration involve in circuit design?
It involves optimizing energy usage and efficiency.
p.36
Wires and Cables Classification
What is the size of wire recommended for the load?
2 - 14 sq.mm THHN Cu wire + 1 - 8.0 sq.mm TW ground in 25 mm RSC.
p.30
Designing an Electrical Plan for Residential Buildings
What is the final step in the electrical plan design process?
Using the load schedule to draw the riser diagram.
