BES704 - Electrical

Outline info
Last revision date 2018-08-28 16:18:57.506
Last review date 2018-08-28 16:18:57.508

Subject Title

Subject Description
This subject covers the design, operation and maintenance of electrical systems in buildings. Topics include the application of Ohm's Law, the components of electrical distribution systems in buildings, their operation and their maintenance.  Students also learn how to calculate utility charges and to reduce electrical loads.  Safety and energy efficiency are emphasized in this subject.

Credit Status
One credit in the Building Environmental Systems (BES) Operator Class II Certificate

Learning Outcomes
Upon successful completion of this subject the student will be able to:

1. Apply Ohm’s Law in a variety of configurations.
2. Explain the application of the principles of magnetism and electro-magnetism to generators, electric motors and transformers.
3. Explain the principles of three phase power and its application.
4. Interpret schematic and wiring diagrams for control and motor control circuits.
5. Interpret floor plans with electrical devices and wiring.
6. Interpret single line diagrams of single phase and three phase building equipment and distribution systems.
7. Describe technologies used to reduce electrical loads.
8. Calculate utility costs based on a rate schedule
9. Describe safety procedures and practices for operation and maintenance of building equipment and systems including lock out/tag out procedure.
10. Describe the correct and safe use of a variety of electrical meters and testers.
11. Select light sources in a given situation, taking into account advantages, disadvantages, light levels, energy consumption and maintenance.
12. Describe the principle of operation of various electronic devices and systems used in building equipment and operations.
13. Describe the advantages and disadvantages of predictive and preventive approaches to maintenance of electrical equipment.

Cheating and Plagiarism
Each student should be aware of the College's policy regarding Cheating and Plagiarism. Seneca's Academic Policy will be strictly enforced.

To support academic honesty at Seneca College, all work submitted by students may be reviewed for authenticity and originality, utilizing software tools and third party services. Please visit the Academic Honesty site on for further information regarding cheating and plagiarism policies and procedures.

All students and employees have the right to study and work in an environment that is free from discrimination and/or harassment. Language or activities that defeat this objective violate the College Policy on Discrimination/Harassment and shall not be tolerated. Information and assistance are available from the Student Conduct Office at

Accommodation for Students with Disabilities
The College will provide reasonable accommodation to students with disabilities in order to promote academic success. If you require accommodation, contact the Counselling and Disabilities Services Office at ext. 22900 to initiate the process for documenting, assessing and implementing your individual accommodation needs.

BES700 is recommended but not required

Topic Outline
Electricity Basics

  • Electricity and the Atom
  • Ohm's Law
  • Parallel and Series Circuits
  • Magnetism and Electromagnetism

Sources of Electricity
  • Generators
  • Batteries
  • Alternative Sources

Electricity Bills
  • Electrical Power, Demand and Energy
  • Power Factor
  • Load Factor
  • Rate Structure

Building Electrical System
  • Transformers
  • Single and Three Phase System
  • Auxiliary Generators
  • System Grounding
  • Building Wiring
Protective Devices
  • Fuses 
  • Circuit Breakers
  • Ground and Arc Fault Interrupters

Motors and Drives
  • AC Motors
  • DC Motors
  • Motor Control Circuits
  • Motor Starters
  • Variable Speed Drives

Lighting Systems
  • Light Sources, Quality and Efficacy
  • Light Sources and Fixtures
  • Maintenance and Efficiency

Electronics and Digital Technology
  • Passive Electronic Components
  • Semi-conductor Devices and Circuits
  • Gates
Electrical System Assessment and Maintenance
  • Safety
  • Meters and Testers
  • Trouble Shooting
  • Maintenance

Mode of Instruction
Traditional Classroom
Lectures, discussions in the classroom, video 

Independent learning with tutor support.  Instructor will contact you by email.

Prescribed Texts
BES 704 - Electrical Manual, Seneca College, ISBN/Sku #: 0-00011-704-B.  Available from the Seneca Bookstore.  

Correspondence students, your text fee is included and your text will be shipped to you.

Reference Material

Required Supplies

Promotion Policy

Grading Policy
A+ 90%  to  100%
A 80%  to  89%
B+ 75%  to  79%
B 70%  to  74%
C+ 65%  to  69%
C 60%  to  64%
D+ 55%  to  59%
D 50%  to  54%
F 0%    to  49% (Not a Pass)
EXC Excellent
SAT Satisfactory
UNSAT Unsatisfactory

For further information, see a copy of the Academic Policy, available online ( or at Seneca's Registrar's Offices.

Modes of Evaluation
Since this is a professional credit subject, marking standards reinforce professional practice by demanding legible, tidy work. Written projects should be well organized and grammatically correct, with proper spelling and punctuation. Late projects are penalized. Please obtain standards, dates and additional information from your instructor.

While attendance is not a formal part of the evaluation process, absenteeism will almost guarantee your inability to achieve a satisfactory grade, as there is no formal provision for make-up tests or projects you may miss.

To attain a passing grade for the subject, a student must complete and obtain a passing grade on all combined projects and tests during the term.  For further information on evaluation and academic standing, see a copy of the Academic Policy. They are available at Seneca Registration offices.

Grading is based on the following marking scheme:

Projects 20%
Midterms 40%
Finals 40%

Correspondence and Online
Project 1              30%
Project 2              30%
Final                      40%



Approved by: Denis Gravelle