Premium Membership

Get access to premium HV/MV/LV technical articles, electrical guides, research studies and much more! Get 20% OFF Code: EEP08PR
Home / Download Center / Electrical Engineering Books and Technical Guides / Electrical engineering guides / Lighting And Electrical Systems Design Guide (Elementary School Building Example)
Lighting and electrical systems design guide - An example of elementary school building
Lighting and electrical systems design guide – An example of elementary school building

Design through an integrated approach

The lighting and electrical design of elementary school is devided into following parts:

  • Electrical Design
  • Lighting Design
  • Fire Alarm Design
  • Telecom Design

Distribution of electrical energy

The school’s electrical system will consist of three-phase 480/277V power and three-phase 208/120V power. The incoming utility feed is assumed to be three-phase 4,160 Volt. This incoming feed enters the building from the Park Avenue street side of the building running parallel with the natural gas, water, and telecommunications utilities.

The service terminates in the building’s main electrical room which is centrally located in the basement level. At the unit substation which consists of a main service breaker-disconnect, a 750 kVA delta-wye transformer, secondary breaker, and secondary switchgear distribution section, the main service is stepped down from a three-phase 4,160V delta to a 480/277V wye configuration.

From here the system splits into the building’s three main power branches – life safety, emergency, and normal. The life safety branch will carry all loads deemed necessary for the protection of human life. The emergency branch will carry all loads that are necessary for safe and reliable operation of the school as an emergency natural disaster shelter.

Supplying standby power for the life safety and emergency branches will come from four Capstone 65kW natural gas microturbines, which will be discussed later in this document (Please see the attached electrical riser diagram for a more detailed organization of the electrical system).

Riser diagrams
Riser diagrams

The preliminary sizing for all equipment was based on a tabulation that can be found on page 25 of the supporting documents and also details of this equipment can be seen on pages 29-30.

Equipment Layout

As mentioned before, the unit substation will be located in the building’s main electrical room in the basement level.

Also, this room will house the main distribution panels for each of the three power branches – life safety, emergency, and normal. The automatic transfer switches for the life safety and emergency branches will be located here as well.
Main Electrical Room Layout
Main Electrical Room Layout

Finally, each branch will be provided with a 480/277V lighting panel, transformer, and 208/120V double-tub receptacle panel in the main electrical room.

Title: Lighting And Electrical Systems Guide – ASCE Charles Pankow Foundation Architectural Engineering Student Competition
Format: PDF
Size: 8.7 MB
Pages: 45
Download: Right here | Get Download Updates | Get Premium Membership
Lighting And Electrical Systems Design Guide - An Example of Elementary School Building
Lighting And Electrical Systems Design Guide – An Example of Elementary School Building

Premium Membership

Premium membership gives you an access to specialized technical articles and extra premium content (electrical guides and software).
More Information


  1. Usman
    May 27, 2019

    Dear Edward

    Could you please share the Short Circuit Calculation excel sheet, cable sizing excel sheet and load calculation sheet to my email address. I will be thankful to you.

    • Moses Lusaaka
      Jun 04, 2019

      Can I also get the excel sheet of the mentioned information on e-mail at

  2. Mike Scirocco
    Feb 04, 2019

    Very nicely done, thank you for making this available. May I ask why no solar cells were included in the proposal?

  3. Bilal
    Dec 28, 2016

    Dear Edvard can you please send me the cable sizing calculation at

  4. Mohamad
    Jun 23, 2016

    link to download the guide for the school is not working. please advise

  5. URG
    Mar 12, 2016

    Hi … is it possible if we can get separate section for design, maintenance, operations, installation etc in technical articles or sitemap to easily navigate in relevant field. Moreover, is there any chat room or blog etc available to discuss any query ?

  6. Abderramane GHARIANI
    Jul 10, 2015

    thanks for all your contribution, more we share more we grow our skill leveln, I appreciate your just feeling about the problems encountered by engineers, go ahead

  7. Amine
    Jul 09, 2015

    I don’t know when I click the blue button I don’t see the page of donwload I see another page.

    • Edvard
      Jul 09, 2015

      Take a look at the bottom, there is a link for download – ‘Right Here’.

  8. Amine
    Jul 09, 2015

    I can not download this guide can someone sent to me at
    thank you

  9. Danish Hayat Latifi
    Mar 30, 2015

    Dear Edward

    Could you plz share the cable sizing excel sheet nd load calculation sheet as i want to know — if i am taking 3 runs of cable from one end to other end , then , why do fault level calculation for 1 run – fault current should also be done considering 3 runs …. In load calculation do we have to consider diversity factor for different panels nd then diversity factor for main panel .
    This is how i do …
    Your clarification plzz

  10. Aamir Baig
    Jan 03, 2015

    I am facing difficulty to download this file, can anyone plz send me at

    • Edvard
      Jan 03, 2015

      Guide sent! Enjoy!

      • Michael
        Oct 31, 2017


        Thanks for your contribution. I can’t open this guide , Can you please send the elementary school design guide as a PDF. I also try open your articles in past and wasn’t able to, please advise if there is another way to access it.


        Michael T

Leave a Comment

Tell us what you're thinking... we care about your opinion!