Skip to content
Electricalterminology

Electricalterminology

Best Blog for Basic Electrical Knowledge

Primary Menu
  • Electric
  • Manufacturers & Brands
  • Electronics
  • About Us
  • Contact
  • Affiliate Disclosure
  • Home
  • Electric
  • What is Overloading in Electricity? Causes of Overloading
  • Electric

What is Overloading in Electricity? Causes of Overloading

electricalterminology 2 years ago
What is an overload

Overloading in electricity refers to the situation when the amount of electrical current being drawn exceeds the capacity of the electrical circuit resulting in potential damage to electrical appliances and even fire hazards. Overloading can be caused by a variety of factors including the use of multiple high-wattage appliances on the same circuit, faulty wiring and outdated electrical systems. In this article, we will delve deeper into the causes of overloading in electricity and the steps that can be taken to prevent it.

What is Electrical Overload?

“Electrical overload” is an excessive current relative to the normal operating current, but one which is confined to the normal conductive paths of the circuit. Overloads are often between 1,35 and 6 times the normal current level. When a circuit is overloaded, the plasticizers in the insulation are vaporized over a long period and the insulation becomes brittle.

Continuous overloads can result from too many loads connected to one circuit or from defective equipment. An overload must be cut off by protection devices before they damage the circuit. Fuses and circuit breakers protect a circuit against current overloads.

What happens during a circuit overload

Overloads are most often between 1.35 and 6 times the nominal current level. Overloads are usually caused by temporary starting currents that occur during the motor start-up or transformer energization. Temporary overloads or transients are not harmful to circuit components as the associated temperature rise is minimal. They are not harmful.

Continuous overloads can result from defective motors (worn bearings) or when too many loads are on a single circuit and must not be permitted to last long enough to damage electrical system components such as conductors. This damage may eventually lead to severe fault events such as fires if the overload is not interrupted. Due to the overload’s inherent low-magnitude nature, removing them within seconds or even minutes will generally prevent thermal damage.

overload current diagram

Causes of Overload

The main causes of an overload in the circuit are:

  • Inrush currents when starting a motor.
  • Worn bearings of a motor.
  • Too many loads in a single circuit.
  • Overloaded machine tools.
  • Damaged material and products.
What are the causes of overloading in a circuit

How can you prevent having an overloaded circuit?

Fuses, overload relays, and circuit breakers are protective devices used to protect circuits against overloads. In the event of an overload, a properly sized fuse, overload relay or circuit breaker will immediately open the circuit. Each device, however, has different time characteristics and must be used and applied according to the appropriate standards and manufacturer’s recommendations for the individual application. Failure to select the properly rated overcurrent protective device can result in fires, explosions, and death.

Is an overloaded circuit dangerous?

An overloaded circuit in an electrical system is dangerous because it can produce heat. Wires and other components in an electrical system have a maximum amount of current they can carry safely. When an overload occurs the electrical current will heat the wires and it could cause a fire.

What are the warning signs of an overloaded electrical circuit?

The obvious sign of an overloaded electrical circuit is breaker tripping.

Other signs can be:

  • Dimming lights.
  • Buzzing outlets or switches.
  • Warm outlet or switch.
  • Very hot appliances or motors.
  • Burning smells.
  • Sluggish electronics.
  • Power outage in a room or whole house.

Continue Reading

Previous: Phase Failure Relay: Working Principle, Advantages, Basics
Next: What is Short Circuit and Why is it Dangerous?

Related Stories

Advantages and Disadvantages of Incandescent Lamps Advantages and Disadvantages of Incandescent Lamps
  • Electric

Advantages and Disadvantages of Incandescent Lamps

electricalterminology 3 days ago
VFD Parts and Functions VFD Parts: A Guide to Their Essential Functions
  • Electric

VFD Parts: A Guide to Their Essential Functions

electricalterminology 4 days ago
Applications of 3 Phase Induction Motors in Industries Applications of 3-Phase Induction Motors in Industries
  • Electric

Applications of 3-Phase Induction Motors in Industries

electricalterminology 4 days ago
Advantages of DC Motors Advantages of DC Motors: Power and Performance
  • Electric

Advantages of DC Motors: Power and Performance

electricalterminology 4 days ago
Applications of AC Motors Applications of AC Motors: The Versatile Uses of Them
  • Electric

Applications of AC Motors: The Versatile Uses of Them

electricalterminology 5 days ago
Advantages of Vacuum Circuit Breakers Advantages of Vacuum Circuit Breakers Explained Technically!
  • Electric

Advantages of Vacuum Circuit Breakers Explained Technically!

electricalterminology 5 days ago

Posts List

Advantages of Transducers Advantages of Transducers for Optimal Measurement

Advantages of Transducers for Optimal Measurement

Advantages of Infrared Sensors Advantages of Infrared Sensors: Improved Accuracy and More

Advantages of Infrared Sensors: Improved Accuracy and More

VFD Faults Causes Prevention Techniques VFD Faults: Causes and Prevention Techniques

VFD Faults: Causes and Prevention Techniques

Advantages of PCB Advantages of PCB (Printed Circuit Board) in Electronics

Advantages of PCB (Printed Circuit Board) in Electronics

Diode Failures Causes Prevention Tips Diode Failures: Causes & Prevention Tips

Diode Failures: Causes & Prevention Tips

PLC Selection PLC Selection 101: Tips and Tricks for a Successful Choice

PLC Selection 101: Tips and Tricks for a Successful Choice

Categories

  • Electric
  • Electronics
  • Manufacturers & Brands
  • Uncategorized

Pages

  • About Us
  • Affiliate Disclosure
  • Contact

Recent Posts

  • Advantages of Transducers for Optimal Measurement
  • Advantages of Infrared Sensors: Improved Accuracy and More
  • Advantages and Disadvantages of Incandescent Lamps
  • VFD Parts: A Guide to Their Essential Functions
  • VFD Faults: Causes and Prevention Techniques
Copyright © All rights reserved. | Magnitude by AF themes.