Construction

Avoid Short Circuit

MCB(Miniature Circuit Breaker) is a series of circuit breaker that belongs to the advanced level of technology. MCBs provide protection against over loads and short circuits and save wires, cables and equipments.

They are used as protective functions against shortage and overloading, and are used in lighting distribution system in industries, commerce and dwelling, and in protecting fractional electric motors. MCBs have many merits of high protective grade (up to IP20), high breaking capacity, good reliability of sensitive action, convenient multi-pole assorting, long life etc. They are mainly adapted for the circuits of AC 50Hz, 230V in single pole, 400V in double, three or four poles for protecting overload and shortage. Meanwhile, they are also used in turning on or off the electric apparatus and lighting circuits under normal conditions.

Different type of  MCB's

(This picture is contributed by "Mishta")

MCB types according to Magnetic trip:

  • Type B-This type of MCB trips from 3 to 5 times when there is full load current.
  • Type C- This type of MCB trips from 5 to 10 times when there is full load current.
  • Type D- This type of MCB trips from 10 to 20 times when there is full load current.


Salient Features:

  • MCBs have (6A, 10 A) etc current ratings above which their function start to open or trip and give protection to the equipment and human being.
  • 6KA fault level of MCB is sufficient enough for general consumer unit, where as 10 KA and above fault level of MCB is sufficient for industrial units.
  • MCBs prevent the accidental overloading of the cable. The speed of the MCB tripping will vary with the intensity of the overloading and depends upon the use of a thermal device in the MCB.
  • MCB should be capable to give protection against heavy faults caused by short circuits. Kilo Amps (KA) is the unit of MCB given in the short circuit conditions.
  • MCBs prevent magnetic fault problems and operate in 1/10 of a second when the fault reaches predetermined level.


Things to remember:

  • At the time of installing of MCB, ensure that the MCB does not give unwanted tripping despite of compliance with the Wiring Regulation and without over loading.
  • Install proper type of MCB according to load, sometimes, for electric motors or low voltage lighting, the use of a type B MCB may give unwanted tripping. Installing of  type C MCB solves this problem.
  • Type D MCB may be installed after consultation with qualified engineer to avoid any problem later on.
  • Generally, type B MCB is sufficient for normal resistive loads. However, in some commercial and industrial units where at the time of starting, either motors or special lighting or data equipment may adversely affect the MCB, in such case it is necessary to use type C characteristic MCB.
  • In industrial units where compressor motors are used, if type B and C of MCB are not able meet the requirements then use of type D MCB is necessary.


Caution: The characteristics for these MCBs may make compliance with the Wiring Regulation difficult without a change in the specifications.

;
Do you know what you should know before hiring an electrician? You are responsible for all electrical faults and its repair. You need to hire an electrician for repair of electrical faults. The following checklist should help you when hiring an electrician.
Low quality materials, unqualified electrician and a little carelessness in electric works can cause fatal electric shocks in home. Such accidents are not easy to repair and compensate. So it is essential to take every care while doing electrical fittings during construction of your house. This article gives some tips on electrical works during house construction.
Electricity can be deadly if not used with utmost care. When the phase or live wire touches our body, electric current gives shock depending on the intensity of voltage and paralyze muscular functions of the body. To avoid electric shocks during electric works/contact, make sure you have followed all precautions of electric shock mentioned in the following article.
Electric fitting must be safe and ensure proper safety to the occupants of the house. Low quality products or appliances can cause fatal accidents like short circuit fire/smoke, break out of fire in entire house, current-shock to any member etc.
In electrical works, earthing or earthed means to connect electrical system to general mass of earth in such a manner as it ensures an immediate discharge of electrical energy without danger at all times.
Saving electricity not only adds to your money but will help thousands in demand of energy also.It’s duty of every citizen to use appliances in proper way.
Sometimes due to carelessness or ignorance, electric phase (Live) wire comes in touch with human body and the current flows through the body as the body is good conductor of electric current.
We all need power to run electrical appliances and different gadgets in our home. For proper distribution of electricity we need to install and maintain the quality wiring by an expert electrician. Following tips will help you understand wiring installation process for your home or office.
Electrical mistakes are common in each and every house that may be dangerous for residents. When you are designing your dream home it may be that you are not aware about the electrical mistakes and its effects. Here are discussed some common electrical problems that can be harmful for residents.
These are three types of faults in electrical fitting: .Open Circuit Fault .Short Circuit Fault .Earth fault and Leakage Fault
The tools for electrical fitting in home: Connector Screw driver (10 cm),Neon Tester,Adjustable Screw Spanner (15cm)
Fluorescent light tubes come in many shapes and sizes. An increasingly popular one is the compact fluorescent light bulb (CF). A fluorescent lamp produces much useful visible light which require only 1/3 to 1/4 of the input electricity.
The breadth and thickness of the strips should be checked.Spacing of screws for fixing strips should be checked.
Check width and depth of the channel, the quality and size of the bricks for mechanical protection.Whether cable identification tags are provided or not.
Brands of electrical materials-Cables-Skytone
Kota stone flooring is a subtle blend of grandeur and luxury giving the interior and exterior a gorgeous look.......
To get maximum ventilation and natural light in your house, make sure the building is properly oriented. Orientation of building saves energy and provides comfortable living as well. This article tells you about various factors and benefits of building orientation.
Preview some of the most impressive pictures of kitchen from GharExpert Gallery.
A solid roof on building is very important for everybody living in the house. The roof should be constructed in a way that assures you great safety. Here are given details about different types of roofing.
Frames of doors and windows are most important parts of your doors and windows. They are available in different size, height, width and shapes. Frames hold locks and hinges and support door and windows to shut and open easily. Here is what you need to know about different doors and windows frames.


Short Circuit Fire
Short Circuit Fire
how to avoid accidents in construction
how to avoid accidents in construction
Short Table Skirt
Short Table Skirt
Bib Cock Short Body Foam Flow
Bib Cock Short Body Foam Flow
Bib Tap Short Body
Bib Tap Short Body
how to avoid accidents in construction
how to avoid accidents in construction
Short Table Skirt
Short Table Skirt
Shower Enclosure in Bathroom
Shower Enclosure in Bathroom
Short Circuit Fire
Short Circuit Fire

Contact us About us
Copyright 2007- GharExpert.com All rights reserved.