ECE 201 Circuit Theory 11 Electrical Safety Example A person accidentally grabs conductors connected to each end of a DC voltage source in each hand. –What.

Slides:

Advertisements

Similar presentations

Electricity and Magnetism Review for Test!.

Advertisements

Electricity in the Home

-RC Circuits -Household Safety

NFPA ELECTRIC VEHICLE SAFETY FOR EMERGENCY RESPONDERS Module II : Basic Electrical Concepts And Hazards Module II : Basic Electrical Concepts And Hazards.

Electrical Safety 1. Introduction Rural and domestic electrical systems cause many injuries and electrocutions each year. –Electrocutions are 5% of worker.

By: Aseem Aggarwal. Causes of Electrocution Fatalities Contact with Overhead Power lines Contact with Live Circuits Poorly Maintained Extension Cords.

Measurement Basics II Dr. Len Trombetta 1 ECE 2100 Power supply: current meter and current limit Light Bulb and LED!

Electrical Safety Safety Unit Lesson 6. Electricity Electric shock from welding and cutting equipment can kill or cause severe burns by coming in contact.

 Tell the electric company how much electrical energy is used  Measure kW hrs (energy units like Joules)  In most homes and factories outlets vary.

Lecture 11—Ohm’s Law, Power

20.3 Electric Circuits Key Concepts What is included in a circuit diagram? How do series and parallel circuits differ? How do you calculate electrical.

ECE 201 Circuit Theory I1 Capacitance Capacitance occurs whenever electrical conductors are separated by a dielectric, or insulating material. Applying.

ECE 201 Circuit Theory I1 Maximum Power Transfer Maximize the power delivered to a resistive load.

ECE 201 Circuit Theory I1 Resistors in Series Resistors connected at a single node Current through each resistor is the same.

ECE 201 Circuit Theory I1 Magnetic Field Permanent magnet –Electrons spinning about their own axis in a particular alignment Charges in motion –Electric.

ECE 201 Circuit Theory I1 Thevenin Equivalent of a circuit containing a dependent source.

ECE 201 Circuit Theory 11 Energy Calculations for Mutually – Coupled Coils.

ECE 201 Circuit Theory I1 Source Transformation Convert a Voltage Source in Series with a Resistance into A Current Source in Parallel with the SAME Resistance.

Chapter 26 DC Circuits Chapter 26 Opener. These MP3 players contain circuits that are dc, at least in part. (The audio signal is ac.) The circuit diagram.

ECE 201 Circuit Theory I1 Natural Response of an RC Circuit.

ECE 201 Circuit Theory I1 Thevenin Equivalent for a circuit containing a dependent source.

NFPA ELECTRIC VEHICLE SAFETY FOR EMERGENCY RESPONDERS Module II : Basic Electrical Concepts And Hazards Module II : Basic Electrical Concepts And Hazards.

Physiological Effects of Electricity on Human Body by Mohd Yusof Baharuddin.

Electrical Safety Understanding and Protecting Yourself from Electrical Shock Humbly Presented By Prof. Bitar.

To bring electric current into a building, an electrician installs wiring. In a house, all of the wires usually come from one main box.

Circuits and Electronics. Circuits A circuit is a closed path through which a continuous charge can flow. A circuit is a closed path through which a continuous.

Simple Electrical Circuit

Devices (TV, Refrigerator, etc) are rated for maximum power/voltage/etc. (They stop working if exceeded) Devices can be overpowered by accident by  overloading.

Electrical Resistance and Ohm’s Law Electric circuits are used to convert electrical energy into some other form of energy we need.

Concurrent Assessment DC Electronics 1 1.When you have a complete series circuit, is the current flow the same at every place in the circuit? 2.What is.

Understanding Electricity

Electrical Safety Electrical Injuries Hazards Protective Measures.

4.2.3B Electrical Power What About Watts?. Power Law Moving electrons (current) requires ENERGY How much energy gets used depends on: Strength of push.

HVACR416 - Design Electrical Safety. Safety and Hazard Prevention Current is the killing factor in electrical shock Human bodies has resistance If voltage.

Electric Circuit. SERIES CIRCUIT +- RARA RBRB In this Circuit, electric current has one path to flow (1) The current is same everywhere in the circuit.

CURRENT AND THE HUMAN BODY. Human body tissues are good conductors of electricity, due to ions in solution in the body. The body’s resistance varies from.

Safety Rules, Practices and Devices Electric Shock – Nerve and muscle (including breathing and heart beat) functions work off of electric pluses (electron.

Lesson 2 How do electric circuits work?. Electric Circuits You know that electric circuits only work when the circuit is closed. OPEN.

Electrical Safety Safety Unit Lesson 6. Electricity Electric shock from welding and cutting equipment can kill or cause severe burns by coming in contact.

EE2010 Fundamentals of Electric Circuits

1 HVACR317 – Core for Refrigeration Safety and Hazard Prevention.

MAXIMUM POWER TRANSFER THEOREM

Investigation of resonance phenomena in LC circuit.

Day 64 Topic 8: Charges and Circuits Electric Power, Costs and More.

Relationship between power, current, voltage and resistance: P = power (watts) I = current (amperes) V = voltage (volts) R = resistance (ohms) Example:

Current Electricity is the rate at which charges pass a given point. The higher the current is the greater the number of charges pass the point each second.

Circuit Forward characteristic Reverse characteristic.

Electrical Safety.

Some Theory Voltage Resistance Current Ohm’s Law

Electric Current.

PROTECTION AGAINST INDIRECT CONTACT

THEVENIN’S & NORTON’S THEOREM AND MAXIMUM POWER TRANSFER THEOREM

Basic Electricity.

Electrical Circuits.

Neutral current is zero

Example Using Low Voltage DC

Instructor: Sujood Alazzam

Find the first partial derivatives of the function. {image}

Ohm’s Law The relationship between voltage, current and resistance is known as Ohm’s Law: V = IR Voltage (V) = Current (I) x Resistance (R) Volts.

Electrical energy By; Kemi and Kim.

Diode Circuits.

Static Electricity Shock

Electric Current.

Ohm’s Law & Circuits Chapter 7.2 & 7.3.

Basic Electric Principles

3 3 R2 R2 R1 R1 RM R3 R3 R4 R v0 v0 Problem 1 (100%)

Example Example 1: An electric lamp is rated 110 W, 200 V. When the lamp is operated at its rated power and voltage, calculate a) the current flowing through.

Anatomical Model Unlabeled

Presentation transcript:

ECE 201 Circuit Theory 11 Electrical Safety Example A person accidentally grabs conductors connected to each end of a DC voltage source in each hand. –What is the minimum source voltage that can produce electrical shock sufficient to cause paralysis, preventing the person from letting go of the conductors? –Assume that the resistance of the arm is 400Ω, the trunk is 50Ω, and the leg is 200Ω.

ECE 201 Circuit Theory 12 + V -

ECE 201 Circuit Theory 13 + V - Current flows through the arms R A = 400 Ω

ECE 201 Circuit Theory 14 Safety Example continued From Table 2.1, the minimum current for muscle paralysis is 50 mA.

ECE 201 Circuit Theory 15 Safety Example continued Is there a significant risk of this type of accident occurring while servicing a personal computer, which typically has 5V and 12V sources?

ECE 201 Circuit Theory 16 Safety Example continued Compute the maximum current that can be drawn from the computer power supply. This current will cause a shock, but will not cause muscle paralysis.