Podcast
Questions and Answers
Which phase of electrical installation focuses on the installation of light fixtures, outlets, and appliances?
Which phase of electrical installation focuses on the installation of light fixtures, outlets, and appliances?
- Rough-in Electrical
- Electrical Plan
- Temporary
- Finish Electrical (correct)
The location of service drops and service equipment must be drawn to scale in the location and site plans.
The location of service drops and service equipment must be drawn to scale in the location and site plans.
False (B)
What is the purpose of the electrical plan in the installation process?
What is the purpose of the electrical plan in the installation process?
To provide a technical representation of the electrical system including devices and equipment.
The __________ phase involves installing electrical boxes and wiring after the structure is framed.
The __________ phase involves installing electrical boxes and wiring after the structure is framed.
Match the following electrical components with their descriptions:
Match the following electrical components with their descriptions:
Which of the following is NOT included in the general notes and/or specifications?
Which of the following is NOT included in the general notes and/or specifications?
Temporary electrical service is established after the finish electrical phase.
Temporary electrical service is established after the finish electrical phase.
Name one type of special equipment mentioned in the general notes and/or specifications.
Name one type of special equipment mentioned in the general notes and/or specifications.
What should be included in the load schedule?
What should be included in the load schedule?
The title block should include the signature of the owner only.
The title block should include the signature of the owner only.
What does the riser diagram represent?
What does the riser diagram represent?
The _____ shows the layout of lights, switches, and power outlets in a building.
The _____ shows the layout of lights, switches, and power outlets in a building.
Match the following components with their descriptions:
Match the following components with their descriptions:
Which of the following is NOT a requirement for an indoor substation plan?
Which of the following is NOT a requirement for an indoor substation plan?
Clearances and spacings in substation plans are its main focus.
Clearances and spacings in substation plans are its main focus.
What is included in the design analysis of electrical plans?
What is included in the design analysis of electrical plans?
The _____ should show the location and dimensions of the substation in the building plan.
The _____ should show the location and dimensions of the substation in the building plan.
What is the primary purpose of a grounding system?
What is the primary purpose of a grounding system?
Flashcards
Temporary Electrical Installation
Temporary Electrical Installation
The initial phase of electrical installation during construction. It involves setting up temporary power near the construction site.
Rough-in Electrical
Rough-in Electrical
The phase of electrical installation where wiring and electrical boxes are installed within the structure's frame. This happens before the structure is completely finished.
Finish Electrical
Finish Electrical
The final stage of electrical work where light fixtures, outlets, and appliances are installed. This is one of the last steps in building a structure.
Electrical Plan
Electrical Plan
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Location and Site Plans
Location and Site Plans
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General Notes and/or Specifications
General Notes and/or Specifications
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Nature of Electrical Service
Nature of Electrical Service
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Type of Wiring
Type of Wiring
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Floor Plan
Floor Plan
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Riser Diagram
Riser Diagram
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Load Schedule
Load Schedule
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Design Analysis
Design Analysis
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Title Block
Title Block
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Indoor Substation
Indoor Substation
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Outdoor Substation
Outdoor Substation
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Overcurrent Protection (OCP)
Overcurrent Protection (OCP)
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Voltage Drop Calculation
Voltage Drop Calculation
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Short Circuit Current Calculation
Short Circuit Current Calculation
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Study Notes
Electrical Design and Installation
- Three Phases of Electrical Installation
- Temporary: Provides power during construction near the final meter.
- Rough-in: Electrical boxes and wiring are installed after framing and roofing. Includes meter and permanent service.
- Finish: Light fixtures, outlets, appliances installed before occupancy.
Electrical Plan
- Purpose: A technical representation of the proposed electrical system, including devices and equipment.
- Content: Displays circuits and systems for installation. Included with other building plans.
Parts of an Electrical Plan
-
1. Location and Site Plans:
- (1): Shows bordering areas (streets, landmarks), optionally scaled.
- (2): Details service drop, equipment, utility pole, meter location, service entrance sizes (wires, conduits).
- (3): Clearance of service drops, wires to adjacent structures.
-
2. General Notes/Specifications:
- (1): Electrical service details (phases, wires, voltage, frequency).
- (2): Wiring types (service entrance, feeders, branch circuits, fire alarm, signaling, communication).
- (3): Special equipment (rectifiers, heaters, X-ray, welding), ratings, duty cycle.
- (4): Grounding system.
- (5): Main disconnect, overcurrent protection (OCP), branch circuit wiring specifics.
- (6): Clearances for service drop, burial depth, mounting heights for equipment, meter.
-
3. Legend: Explains symbols used in the plan.
-
4. Floor Plan:
- Shows locations of lights, switches, outlets.
- Details lighting fixtures (location, type, rating).
- Details power outlets (location, type, rating, branch).
- Details control systems (location, type).
-
5. Load Schedule:
- Details branch circuits, outlets, switches.
- Calculates wattage rating, current load, wire sizes for each circuit.
-
6. Riser Diagram: A schematic of all circuits from the main service to branch circuits.
-
7. Design Analysis:
- Details branch circuits, feeders, subfeeders.
- Ratings, trip settings of overload devices.
- Voltage drop calculations.
- Short circuit current calculations for OCP interrupting capacity.
- Protection coordination of overcurrent devices.
- Arc flash hazard analysis for PPE requirements (non-residential).
-
8. Title Block:
- Standardized strip at the bottom of each sheet.
- Contains project name, location, owner/manager information.
- Includes engineer name, signature, license info, and project details.
-
9. Indoor Substation:
- Locations, dimensions of substation, relative to building and property.
- Structural details (walls, floors, roof, openings).
- Ventilation, drainage, safeguards.
- Electrical details (equipment locations; clearances; grounding).
- Cross-sectional views for clearances and details.
- Miscellaneous (equipment specs, wiring, diagrams, calculations).
-
10. Outdoor Substation:
- Same details as indoor, except replaces walls/roof with fence and support structures complying with the latest Philippine Electrical Code, Part 2.
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