Electrical plan is a graphical presentation of electrical wiring connections to install in a particular house or building. It indicates the position of electrical fixtures such as convenience outlets, switches, lightings, door bells, and others to be installed.

REPUBLIC ACT NO. 7920 New Electrical Engineering Law

Section.34. Preparation of Plans, Supervision of Installation, Application of the Philippine Electrical Code

It shall be unlawful for any person not authorized under this Act to prepare plans, electrical valuations or specifications for any electrical wiring, equipment or system; and no installation thereof shall be undertaken unless the plans, designs, valuations and specifications have been prepared by or under the responsible charge of, and signed and sealed by a professional electrical engineer; and a construction permit for the execution thereof is first secured; and unless the work is done in accordance with the Philippine Electrical Code and is executed under the responsible charge or supervision of a professional electrical engineer, a registered electrical engineer, or a registered master electrician, as the case may be, and the routinary fiscal and ministerial requirements of the government agency, if any, exercising jurisdiction over the particular installation have been complied with.

In Preparation of Electrical Plans it should be in compliance of Philippine Electrical Code. And in submission of electrical plans to the office building official to get electrical permit it should include the electrical design analysis showing all the calculations of short circuit, currents and voltage drop.

1. Sheet Size.

Electrical plans and drawing shall be drawn on sheets of the following standard sizes:

760 mm x 1000 mm

600 mm x 900 mm

500 mm x 760 mm

2. Drawing Scale.

Appropriate metric drawing scales shall be used.

3. Plan Requirements.

3.1 Location and Site Plans. Location and site plans, with proposed structure(s) and site drawn to appropriate scale shall show.

• Bordering areas showing public or well-known streets, landmarks and/or structures which need not be drawn to scale unless they extend into the area concerned.

• Location of service drop, service equipment and nearest pole of the utility company furnishing electrical energy; location of the meters as well as sizes of service entrance wires, conduits and service equipment; and

• Clearance of the path or run of service drop and entrance wires to adjacent existing and/or proposed structures.

3.2 Legend or Symbols.

Refer to Appendix A (Philippine Electrical Code) – Electrical Symbols.

3.3. General Notes and/or Specification General Notes and/or Specification, written on the plans or submitted on separate standard size sheets shall show:

3.3.1 Nature of electrical service, including number of phases, number of wires, voltage and frequency;

3.3.2 Type of wiring;

• Service entrance,

• Feeders, sub-feeders and branch circuit wires for lighting and/or power load,

• Fire alarm system, if required by law,

• Signaling and communication

3.3.3 Special equipment to be installed, indicating ratings and classification of service or duty cycle of;

• Rectifiers,

• Heaters,

• X-ray apparatus,

• Electric welding equipment,

• Others

3.3.4 System o method of grounding;

3.3.5 Type and rating of main disconnecting means, overcurrent protection (OCP) and branch circuit wiring;

3.3.6 Clearances of service drop, burial depth for service lateral, mounting height and clearance for service equipment, mounting heights and clearance for kWh meter.

3.4 Electrical Layout. Floor plan showing location of equipment and devices, and their interconnection wiring

3.4.1 Plan for Power. Layout and wiring plans for power on the floor plans drawn to scale shall show:

• Sizes and location of service entrance conductors, raceways, metering equipment, main switchboard, layout of feeders and distribution panels or switches and their sizes, types and ratings;

• Complete circuits of motors and other electrical equipment, their controlling devices, their locations and ratings;

• Complete wiring of emergency power system, if any;

Nature of processes/activities carried out in each room or area.

3.4.2 Plan for Lighting and Receptacle Outlets. Layout and wiring plans for general lighting and convenience outlets on floor plans drawn to scale shall show:

• Location, type and rating of lighting fixtures, indication illumination in lux in each room or area. In residences, hotels, apartment, houses, and churches, the illumination level in each room or area need not be shown nor computed;

• Location of switches for each fixtures or group of fixtures;

• Location of receptacle outlets and appliances to be served and their ratings;

• Complete circuits of the lighting and convenience outlets;

• Complete wiring of emergency lighting and convenience outlets;

• A separate drawing showing layout of receptacle outlets may be made at the discretion of the design engineer.