Electrical Load Calculator

8/12/2019 Electrical Load Calculator

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WIR Users Manual 1

Electrical Load Calculator for Single Family Dwelling

of Less Than 50 Square Meter

Researcher

Michael B. Tomas

Master of Science in Electrical EngineeringMajor in Power System

The significance of a safe electrical design could not be denied. In the Philippines alone,hundreds of electrical related accidents were recorded and even took several lives and destroyed

properties.

Knowledge of determining the capacity of the main circuit breaker and size of wire are

required to prevent electrical accidents. More often the need to refer from appropriate handbooksis necessary for knowing the correct sizes and capacity of electrical fixtures which from the fact

that certain individuals were not aware of the danger pond be installing additional electrical loads

in their houses or installing electrical wiring without any prepared electrical plans that weredesigned, signed and sealed by a licensed professional electrical practitioner.

In the Philippines, preparation of electrical plan was one of the basic requirements for

any electrical wiring installations as mandated by RA 7920 or known as the New Electrical

Engineering Law. The details of the said electrical plans were also specified in Article 2 of thePhilippine Electrical Code (Part 1).

These electrical plans served as basis for cost of material estimates, a blueprint guide

during installation and safety precaution document before and during actual wiring installations.

Sophisticated software for electrical engineering applications particularly on electricalplan preparation were made available in the international market but with a very high cost. An

alternative way was to use a simple excel format but it came with limited capacity in relation to

working on electrical load calculations, generating riser diagrams, determination of proper sizeof wire, conduit, breaker, etc.

This technical paper was prepared with the aim of presenting computer-based software

entitled Electrical Load Calculator for Single Family Dwelling of Less than 50 Square Meters.

It also presents how the system generates an electrical layout plan having all the design aspectsfor residential electrical installation such as computation and schedule of loads, riser diagram,

legend, size of feeder wire and rating of over current protection devices including wiring

inspection report similar to what TARELCO I requires.The Research and Development cycle was employed in coming up with the computer-based

system. To realize its usefulness, an experts evaluation and validation of the system was

solicited. To assume of the legitimacy of the Registered Professional Engineer was sought.

The following presented the summary of the findings on the development of the proposedsystem based on the ratings given by the users:

1. The system performs the computations automatically and shows summary of resultsincluding the riser diagram. It has also the capability of saving, editing opening, andprinting of results.

2. The result of the study was found relevant and useful to the electrical engineeringprofession.

3. The system has the capability to allow users to revise and retrieve data stored.


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WIR Users Manual 2

4. The system can do accurate computations.5. Symbols for electrical fixtures are provided, making the system user friendly.The report shows that the system performs excellent for low cost houses single dwelling

up 50 square meter floor area generating results, including saving, opening and editing. As

reflected in the Evaluation of Experts.

Based on the findings and conclusions of the study, the following recommendations areoffered:1. Upgrading of the developed program for industrial applications.2. A system should be developed to have it available in handheld device or integrate it

in mobile phones as an added feature to make it more available and handy.3. The developed system is bound for small dwelling buildings only.

System Requirements

Before installing EWIR, make sure your system meets EWIR hardware requirements.

Hardware

Desktop Computers

Windows XP or Vista

Microsoft Office with Microsoft Access 2000

Pentium 4 or Higher1 GHz or later

256MB

20 MB Disk space

CD-ROM Drive


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WIR Users Manual 3

The EWIS Environment

Main Window

Its the first window to open when you run the program.

Parts of the Main Window

1. New Applicant Button2. Save Button3. Edit Button4. Open Buttons5. Settings Button6. Close Button

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WIR Users Manual 4

New Applicant/Edit Window

This window is used for new application or to edit existing applicants data.

To open as new application, click the New Applicant Button For editing, (this option is only enabled when there is already existing data from the main

window), click the Edit Button

Parts of New Applicant/Edit Window

1. First Name Box2. Last Name Box3. Address Box4. middle Name Box5. Type of Consumer Selection Box6. Lighting Outlet Settings Box7. Convenience Outlet Settings Box8. Refrigerator Settings9. Air Conditioning Unit Settings10.Other Load Settings11.Type of Protection Selection Box12.Main Wire Type Selection Box13.Done Button14.Cancel Button

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WIR Users Manual 5

Open Window

This window is used for opening existing applicants from the database of the program.

To open the Open Window; click the Open button from the main window

Parts of Open Window

1. Search Option Box2. Search Box3. Search Button4. Remove Button5. Open Button6. Cancel Button7. Refresh Button8. Preview Window

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WIR Users Manual 6

Settings Window

This window is used to customize the settings of the form that will be printed out. You can

change the company logo, company name, name of the inspector etc

To open the Settings Window click the Settings button from the main window.

Parts of Settings Window

1. Company Name Box2. Company Branch Box3. Company Address Box4. House Wiring Inspector Name Box5. Electrician Name Box6. Electrician BE Number Box7. In-Charge of Installation Name Box8. In-Charge PRC Number Box9. In-Charge PTR Number Box10.PEE Name Box11.PEE PRC Number Box12.PEE PTR Number Box

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13.Company Logo Preview14.Company Logo Button15.Save Button16.Cancel Button


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WIR Users Manual 8

Logo Browser Window

This window is used to customize the settings of the form that will be printed out. You can

change the company logo, company name, name of the inspector etc

To open the Settings Window click the Settings button from the main window.

Parts of Settings Window

1. Address Bar2. Directories Box3. Drive Box4. File Box5. Use Image Button6. Cancel Button7. Picture Preview Box

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WIR Users Manual 9

Desktop Features

The desktop interface

Main Window

This window is the main window where the user can start by selecting the New Applicant

button and input the applicants data or open existing data.


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WIR Users Manual 10

New Applicant/Edit Window

By selecting the new applicant or open button this window will open. In this window the user

can input or edit applicants data.


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WIR Users Manual 11

Table View

Riser Diagram View

Result View Window

After inputting or editing the applicants data result window will appear, you can toggle your

view in this window in table or riser diagram view.


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WIR Users Manual 12

Settings Window

The Settings Window is used to customize settings of print output of the program. In this

window the user can change the name of the company, name of the electrician, etc. and even the

company logo.


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WIR Users Manual 13

Printing Reports

The EWIR printing reports includes two print output, layout was based on the form of

TARELCO 1 it includes Applicant Information, Table Result and Riser Diagrams.

First page


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WIR Users Manual 14

Second Page

Evaluation of Experts on the Software

Software Evaluation CriteriaAverag

e

Descriptive

Rating

VerbalInterpretatio

n

1. Relevance and usefulness (Composite Mean:4.64)1.1Highly suitable for electrical

engineering practice4.8

Very

Satisfactory

Acceptable

1.2Can be contribute to make designeasier

4.6Very

Satisfactory

Acceptable

1.3Highly recommended for distributionutilities

4.6Very

Satisfactory

Acceptable

1.4Can make the process of applicationfor electric service faster

4.6Very

Satisfactory

Acceptable

1.5Relevance to the need of customers 4.6 Very Acceptable


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Satisfactory

2. Efficiency of the software in (Composite Mean:4.56)1.6Making copies/replication of plan

4.6

Very

Satisfactory

Acceptable

1.7Making revisions of plan4.4

Very

Satisfactory

Acceptable

1.8Processing data to obtain printedoutput 4.6

Very

Satisfactory

Acceptable

1.9Making backup copies in case ofcorrupt files 4.6

Very

Satisfactory

Acceptable

1.10 Displaying graphic images4.6

Very

Satisfactory

Acceptable

3. Accuracy of computations (Composite Mean:4.56)1.11 Values agree with the PEC

Standard 4.6

Very

Satisfactory

Acceptable

1.12 Dimensions are accurate in termsof margin, symbols used and text. 4.4

Very

Satisfactory

Acceptable

1.13 Size of wire and conduit sizes arematch properly 4.8

Very

Satisfactory

Acceptable

4. User-friendliness (Composite Mean:4.6)1.14 Can be learned by first time user

in minimal time 4.4

Very

Satisfactory

Acceptable

1.15 Gives comfort and enjoyable4.6

Very

Satisfactory

Acceptable

1.16 Suited to every age of electricalpractitioners 4.8

Very

Satisfactory

Acceptable

Table 1


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WIR Users Manual 16

BIBLIOGRAPHY

PEC 1 Philippine Electrical Code 2000, IIEE Philippines

Walance Wang, Visual Basic for Dummies, IDG Books worldwide Inc.

Jeremy Crawford, Visual Basic 6.0 Complete, SYBEX Inc.

Dumalag, Marilyn D., Menor, Annabelle A., A Computerized Electrical Power System Design

for Low Cost Houses. Undergrad Thesis, Tarlac State University

Richelle S. Banting, Shirley S. Dela Cruz, Custer T. Ochava, A Prototype Computer Integrated

Control System, Unpublished Thesis College of Computer Studies of Tarlac State University

http://imet.csus.edu/imet1/denyer/mhs_denyer/index.htm

http://www.vabuk.com/ebooks/philippine-electrical-code-pec-1.html

Documents

Electrical Load Calculator