What should be the contents of my Electrical Plan? -Based on PEC 2017

Posted on September 25, 2019

(F) Design Analysis.

Design analysis shall be included on the drawings or shall be submitted on separate sheets of standard size, and shall show:

  1. Branch circuits, sub-feeders, feeders, busways, and service entrance;
  2. Types, ratings, and trip settings of overload protective devices;
  3. Calculation of voltage drops.
  4. Calculation of short circuit current for determining the interrupting capacity of overcurrent protective device for residential, commercial, and industrial establishment;
  5. Protection coordination of overcurrent protective devices;
  6. Arc-Flash Hazard Analysis to determine the required personal protective equipment (PPE) i other than dwelling place – (see Appendix H for PPE)

FPN No. 1: This analysis is not required for dwelling units but required for service equipment and other electrical equipment n part of the individual dwelling units of residential condominium and individual detached dwelling units.

FPN No. 2: Arc-flash hazard analysis required is intended or concerned parties to be informed and made aware of the importance of personal protective equipment (PPE) and its Or the flash hazard risk category determined by the analysis: further overcurrent protective devices coordination coupled With lash hazard analysis can reduce the severity of PPE needed but is not required under this arc-flash hazard analysis.

FPN No. 3: IEEE std 1584-2002, Guide for Performing Flash Hazard Calculations provides guidelines for arc-flash hazard analysis.

 (G) One Line Diagram. One-line diagram shall indicate:

(1) Lighting and Receptacle Outlet Loads;

  1. Single line or schematics diagram of lighting and receptacles panelboards showing mains and branch circuit rating;
  2. Size of conductors for feeders.

(2) Motor Loads;

  1. Rating in kilowatts/horsepower/kilovolt ampere
  2. Full load current
  3. Locked rotor current
  4. Phase connection for I-phase motor on a 3-phase system
  5. Rated voltage
  6. Type and size of wiring, indicating load in amperes
  7. Electric motors shall be numbered consecutively to correspond to their numbers in the layout

(3) Feeders and Sub feeders;

  1. Identification and/or labeling of feeders and sub feeders
  2. Size and type of wires and raceway
  3. Protective devices and controls
  4. The allowable ampacity of the conductor over the designed load current in amperes expressed as a ratio and indicated alongside the conductor

(4) Load Center.

  1. Identification and/or labeling of load center showing type and rating of transformer, switches, circuit breaker and other related devices
  2. Incoming and outgoing feeders, type, size and voltage
  3. Equipment grounding

1.3.2.2 Title Block.

Title block or nameplate of plans and drawing shall be a standard strip of 40 mm high at the bottom of the sheet.

It shall contain the following:

  1. Name and location of installation or project;
  2. Name, signature and address of owner/manager/ operator;
  3. Title of sheet;
  4. Name, signature and seal of Professional Electrical Engineer together with Professional Regulation Commission professional license number and validity, Professional Tax Receipt Number, and Tax Identification Number;
  5. Scale used, date drawn; and
  6. Sheet number.

1.3.2.3 Other Details.

(A) Exposed conductors shall show:

  • Means of support and types of insulators; and
  • Spacings and clearances.

(B) Auxiliary gutters, wireways, busways, cabinets, boxes, metallic raceways, underground installations, other than specified in the Code shall show:

  • Installation details;
  • Conductor supports, separators, and attachments where required by this Code; and
  • Dimensions and description or specifications.

(C) Private pole installations shall show:

  • Construction and installation details and dimensions;
  • Pole top wiring details including line hardware; and
  • Guying details.

(D) Low energy power and low voltage power installation shall show:   

  • Details of battery installation and/or other source of low voltage or low energy power;
  • Equipment, wiring, actuating mechanism and protective devices; and
  • Ventilation details whenever necessary.

1.3.3 Substation Plans and Specifications

1.3.3.1 Indoor Substation.

Indoor substation plans shall show:

(A) Location and dimensions of;

  • Substation in building plan drawn to scale,
  • Building with respect to entire compound or property,
  • Incoming and outgoing lines, and
  • Windows, doors, and other openings.

(B)  Substation structural requirements;

  • Materials and construction of walls, floors, roof, windows, enclosures, doors, and their dimensions, and
  • Ventilation and drainage systems and other safeguards.

(C)  Substation electrical requirements such as;

  • Plan view showing location and sizes of equipment installed,
  • Clearances and spacings between exposed current-carrying and noncurrent-carrying   portions and grounding equipment, and
  • Grounding system.

(D) Cross sectional views showing;

  • Horizontal and vertical clearances between exposed parts and adjacent surfaces,
  • Horizontal and vertical clearances of exposed parts from floor/ceiling,
  • Finished floor level and ground level.

(E)  Miscellaneous;

  • Specification of equipment,
  • Wiring of lighting and remote-control systems,
  • One-line diagram(s) of entire installation with voltage indicated,
  • Computations on size of wires, busbar, transformer, fuses, switches and breaker, and
  • Class of insulation or insulators.

1.3.3.2 Outdoor Substation.

Outdoor substation plans shall show same items as indoor substation except that in lieu of walls and roof, details of fence and supporting steel structure shall be shown in accordance with the latest edition of the Philippine Electrical Code, Part 2.

References:

PEC 2017

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