OS assignment feb 22

docx

School

No School *

*We aren’t endorsed by this school

Course

Subject

Electrical Engineering

Date

May 21, 2024

Type

docx

Pages

Uploaded by AgentOxide25313

Unit 3 Electricity (5%) Answer the following questions: a. Fuses and circuit breakers do not protect against shock. What are they designed for? Fuses are designed to protect electrical circuits from overcurrent conditions. When the current exceeds a safe limit, the fuse melts (or blows), interrupting the circuit. Fuses prevent damage to equipment, wiring, and appliances by breaking the circuit when excessive current flows. They act as sacrificial elements, sacrificing themselves to safeguard the rest of the system. 2. Circuit breakers protect against overcurrent, short circuits, and ground faults. When an abnormal condition occurs, the breaker trips, disconnecting the circuit. while fuses and circuit breakers do not directly protect against electric shock, they play crucial roles in maintaining electrical safety by preventing damage and fire hazards caused by excessive current or faults. b. How does a GROUND FAULT INTERRUPTER(GFCI) protect against shock? Ground Fault Circuit Interrupters, commonly known as GFCIs, are electrical devices designed to protect us from the dangers of electric shock and electrical fires. They monitor the flow of electrical current and swiftly cut off power if an imbalance is detected. c. Define Arc flash An Arc flash is a short circuit in the air that flashes from one exposed live conductor to another or the ground. Arc flash occurrences are widespread and costly, and the number of reported mishaps is rising. d. Describe controls that can be used to safeguard against electricity. There are various controls for protecting people from the hazards caused by electricity, including insulation, guarding, grounding, and electrical protective devices.

e. Identify sections of the regulations for construction projects and Industrial establishments that apply to electrical hazards. Construction Regulation (Ontario Regulation 213/91 – Sections 181-195.3) Ontario Electrical Safety Code Ontario Regulation 213/07 – Fire Code Part 4, Subsection 4.1.8 (Handling Flammable and Combustible Liquids) Ontario Regulation 851, Regulation for Industrial Establishments, Section 22, Subsection 4 Ontario Regulation 851, Regulation for Industrial Establishments, Sections 40-42, 74-76 Canada Occupational Health and Safety Regulations SOR/86-304 – Pat VIII (wasn’t sure if Federal legislation was required) NPFA 70E Standard for Electrical Safety in the Workplace CSA Z462 Workplace Electrical Safety CSA Z460 Control of Hazardous Energy - Lockout and Other Methods

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version