Different Types of Electrical Switches and Their Uses

Different Types of Electrical Switches Normally Used in Circuits

There are so many types of electrical switches available from very simple to very complex switches used in electrical circuit controlling system. 

Switch may different types but the basic function of electrical switch is to open or close. The meaning of electrical switch is to open or close the electrical path to equipment. 




What are the different types of electric switches that uses in every home?

When we name the switches, we find some common and lovely switches as below:
SPST Single Pole Single Through SwitchSPST- Single pole, single throw switch. It is simple on-off switch just having  two terminals are either connected together or disconnected from each other by phase P1 and terminal T1.
It is also classified into two types: SPST-NO-single pole, single throw, normally open known as Type-A and SPST-NC- single pole, single throw, normally closed known as Type-B. 

The most common and simple type of electric light switch is the one way switch. A very simple one way press operation and instant effects. Their operational simplicity makes user comfort a reality.


SPDT Single Pole Double Through Switch SPDT-  Single pole, double throw. It is simple break-before-make changeover switch common terminal is connected either to Terminal T1 or Terminal T2.
Similar as SPDT some manufacturer use SPCO/SPTT meaning single pole changeover or single pole, center off or single Pole Triple Throw for switches. 

Two way switches are very much different and are extensively found in modern homes that have limited number of switching accessories. Their usage is very efficient and adds to the convenience of the users significantly.


DPST Double Pole Single Through Switch DPST- Double pole, single throw. DPST actually equivalent to two SPST switches together controlled by a single mechanism.


DPDT Double Pole Double Through Switch
DPDT- Double pole, double throw. DPDT actually equivalent to two SPDT switches controlled by a single mechanism. 

Some manufacturer use DPCO - double pole change over for switches with a stable center position. 

2P6T Two Pole Six Trough Switch

2p6tTwo pole, six throw. 2p6t is actually a changeover switch with a common terminal which can connect to L1 to L6 with a two pole second switch controlled by a single mechanism.




What type of switch is used in an electrical panel?

The switches used in electrical panels may manual switches or automatic switches. The manual operated switches such as light switch, fan switch or manual switch for any kind of electrical circuit of electrical equipment.

Automatically operated different switches can be used to control the motions of machines such as to indicate a door has reached its full open position or full close position.

Switches may be operated by process variables such as pressure, temperature, flow, current, voltage, and force, acting as sensors in a process and used to automatically control a system. There are many different switch designs. The most common electrical panel switches are:




Slide switch: A slide switch has a knob that you can slide back and forth to open or close the contacts. Slide switches we find as SPST (single pole single throw), DPDT (double pole double throw) switch.




Toggle switch: A toggle switch has a lever that we flip up or down to open or close the contacts. The common light switch used in household wiring is an example of a toggle switch.Toggle switches are actuated by a lever angled in one of two or more positions. Most famous type of toggle Electrical Switches contain two positions.






Rotary switch: A rotary switch has a knob that we turn to open and close the contacts. The switch in the base of many tabletop lamps is an example of a rotary switch.







Rocker switch: A rocker switch has a seesaw action. We press one side of the switch down to close the contacts, and press the other side down to open the contacts.


You may read the circuit-switch 

MCB: MINIATURE CIRCUIT BREAKER OPERATION BASIC

Knife switch: A knife switch is the kind of switch Igor throws in a Frankenstein movie to reanimate the creature. In a knife switch, the contacts are exposed for everyone to see.



Mercury switch:The mercury switch consists a drop of mercury inside a glass bulb with 2 contacts. The two contacts pass through the glass, and are connected by the mercury when the bulb is tilted to make the mercury roll on to them.

Push-button switchA push-button is simply button which switch mechanism for controlling some aspect of a machine or a process.  Though even many un-biased buttons require a spring to return to their un-pushed state. These switches are used for bell circuits, refrigerator lighting circuit. Some of push button on industry also contain indication lights such as Red, Green and yellow.



Special types of switches are:

Differential Pressure Switch

Differential Pressure switch: Differential pressure switch is a device which utilizes a differential air pressure to actuate an electric switch at a preset actuation point. This may be the difference between two positive or two negative pressures, one of each, or a positive and atmospheric or a negative and atmospheric pressure. The electric switch may be used to start or stop motors or fans, open or close dampers or louvers, light a warning signal, sound alarms, etc.



Foot Switch



Foot switch: Some machinery like garments factory swing machine use foot switch that operated by foot instead of hand.
Reversing Switch
Reversing switch:Reversing switch is an electric switch that has four terminals capable of being connected in pairs in two different ways so as to reverse the direction of motor.









You may read the different types of switches in details in another articles:

  1. How Select Control Switches, Selector Switches and Auxiliary Switches;
  2. Automatic Transfer Switch Diagram And Operation Procedure;
  3. How Do Electronic Thermostats Work In HVAC System?;

28 Basic Symbol of Electrical Switches that Use Widely

Symbol for electrical switches is important to eletricians to select proper switches during wiring.

Following 28 switch-symbol is the most common uses stitches in our work place.

This is not the limit, there are many switches and switch-symbol for them.

You may read the another article to know the detail wiring syste on-

ELECTRICAL DISTRIBUTION BOARD DB WIRING.


Symbol of Electrical Switches

Top Brands Electrical Switches that Uses in Bangladesh

Siemens - Huge scale of operation and range, adapted to Bangladesh, electrical switches of Siemens work irrespective of the load, products are reliable. In house Siemens switches and sockets are used as first choise in high grade equipment.


Schneider - French multinational, develops technology and solutions that make energy safe, reliable, efficient, green and productive. Schneider switches and sockets are popular in industry sector.


Legrand -Widely used in Bangladesh as switches and sockets of miniature circuit breakers and distribution boards.

Havells - Indian company, the switches and sockets are widely used in India and Bangladesh.


Wipro - Modular switches are equipped with glossy finish switches flaunt radium markers for visibility at night, protective spark shield for added safety, thermoset housing for safe electrical insulation, and silver coated metal parts for better current conductivity.


Polycab - specializes in high and low voltage switch-gear, different range of solutions that are suitable for all kinds of HV/LV power engineering requirements including protection, metering, and control equipment.

Orpat - Gujarat based company, known for silver series modular switches and copper series modular switches, which are gradually gaining in popularity in the country.




JACK AND PLUG CONFIGURATION IN DIFFERENT COUNTRIES

Jack & Plug or Plug & Socket Configuration in Various Countries

There is no guy who haven’t faced to fix unmatched Plug & Socket or Jack & Plug what ever you say. Especially you, who frequently visit different location or live in Asian country where not follow any specific standard, often face this problem during using computer/laptop, mobile etc charger.

Most of the developed countries use jack and plug configuration as per some international standard or their local standard, but many countries do not follow any specific standard, they use various configarated jack and plug what causes of this problem.

Some of standard jack and plug descriptions are quoted below that are using in Europe, America and other countries-


  Jack                   Plug
Description
Using Countries
Schuko European CEE 7 Jack & Plug
Schuko European
CEE 7
EU, Austria, Netherland, French, Germany, Irish, Italy, Norway, Sweden, Switzerland
Ungrounded Eurocord CEE 7/16 Jack & Plug

Ungrounded Eurocord
CEE 7/16
EU, Belgium, Denmark, Netherland, French, Germany, Italy, Norway, Portugal, Spain, Sweden, Switzerland, UK, Singapore
Belgium/ French Socket CEE 7/7 Jack & Plug
Belgium/ French Socket
CEE 7/7
Belgium, French
British Standard BS 1363 Jack & Plug
British Standard
BS 1363
French, Irish, UK, Singapore
Old British Standard BS 546 Jack & Plug
Old British Standard
BS 546
Portugal, Spain
North American Ungrounded Jack & Plug North American Ungrounded Mexico, Canada
North American NEMA 5-15 Jack & Plug North American
NEMA 5-15
Canada
Australian Standard AS/NZS 3312 Jack & Plug Australian Standard
AS/NZS 3312
Australia
Typical Pipe Work In a Project
Japanese Standard JIS C 8303  Jack & Plug
Japanese Standard
JIS C 8303
Japan
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Most Using Standard in Electrical Engineering 

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NFPA - National Fire Protection Association - National code that covers anything to do with flammable stuff (electrical, dust, combustibles, sprinklers, fire alarms, etc);


NEC - National Electric Code, NFPA 70 (NEC is a section of the NFPA code) - Addresses proper installation of electrical equipment, devices and wiring.

The first NEC document was written in 1897 at the insistence of various insurance, electrical, architectural and other interested parties. Up to and including 2008, there have been a total of 51 editions. It is revised on a regular three-year schedule. The National Electrical Code is divided into approximately 120 articles;


NEMA - National Electric Manufacturers Association- trade organization for electrical manufacturers. Sets common rules, practices and certification for the manufacture of electrical components and devices;


IEC - International Electric Code - International version of NEMA,
IEC set requirements that cover the installation and management of electronic systems along with wiring and electric shock protection.


Quiz: Here is a Jack & Plug quiz for the readers; We everybody have seen the three pin Jack & Plug, if you look at this three pin plug again, there are two pin for phase and neutral are same size, and one pin for earthing or grounding which is thicker and bigger than others.
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Question for you, why this earthing pin is thicker and bigger than others? 
You can give your answer as comments below.

10 Lowest Electricity Accessible Countries in the World

Which Country Access the Less Electricity   in the World?

Electricity is the most essential part of daily-life today. But fact is that around 1285 million people still access no electricity today over the world. The most of them are in Africa and Asia. Now everybody realized that without access to electricity sustainable development is not possible, most of the countries are trying the increase the electricity access rate up to 100% and trying everyday.


10 Less Electricity Accessable countries in Asia
Fig-1: Less Electricity Accessible countries in Asia
In Asia around 622 million people out of 3.6 billion do not have electricity. Large percentage of people do not have electricity access in North Korea, Myanmar (Burma) and Cambodia. On the other hand Malaysia, Singapore, Thailand, Brunei and Mongolia are accessing electricity hundred percent people.

India has the largest population that does not have to access electricity around 304 million people. Indian 94 percent urban and 67 percent rural people can access to electricity.

10 Less Electricity Accessable Countries in America
Fig-2: Less Electricity Accessible countries in America
In America 23.2 million  out of 466.1 million people do not have electricity access. Haiti remains a regional outlier, with only 29 percent of its population- mostly concentrated in and around its capital city Port-au-Prince having access electricity. Haitians who have electricity receive power an average of five to nine hours per day.


Less Electricity Accessable countries in Middle East
Fig-3: Less Electricity Accessible countries in Middle East
Middle East pretty advanced to access electricity except Yemen. In middle east 17.7 million of 214.8 million people do not have electricity.

Nearly 80 percent of people without electricity in the middle east live in Yemen.


10 Less Electricity Accessable countries in Africa
Fig-4: Less Electricity Accessible countries in Africa
In Africa 622.6 million of 1.1 billion people do not have electricity. In North Africa 1 out of 10 do not have access to electricity, where in Sub-Sahara 7 out of 10 do not have access to electricity.


 In African countries electricity access varies widely between rural and urban areas. In sub-Saharan Africa, the urban electrification rate is around 60 percent, but in the rural area it is 14 percent only. At least 50 percent of country population out of electricity in 38 to 49 countries.



There are 10 countries in the world, lowest electricity access are in African continent.

10. Tanzania: 

Tanzania is in extraordinary need of electrical vitality, and just 15.3% of its populace approaches power. In any case, the nation brags of having a wealth of various potential vitality sources from biomass, sun oriented, wind, coal, geothermal, gaseous petrol, and uranium alike. Lamentably, a large portion of these have stayed immature. The provincial regions utilize biomass gathered from Tanzanian timberland to meet about 80% of their vitality needs, for example, consuming wood for cooking and heating, further intensifying living space debasement there.

9. Niger:

Niger experiences issues providing power to its residents, and the utility serves just around 14.4% of its populace. Quite a bit of Niger's populace lives in provincial zones, a large portion of which are without power. In spite of the fact that power isn't the fundamental vitality utilized by the nearby individuals, and the majority of them are accustomed to abandoning it, the entrance would help enhance monetary improvement and the general headway of their lives.

8. Sierra Leon: 

Sierra Leon has just about 14.2% of its populace presently approaching power supplies. The World Bank has made accessible to Sierra Leon a $40 million acknowledge line, for which it could extend the power accessible to its provincial territories. The Energy Sector Utility Reform Project will set up a practical administration structure that ought to enhance the national power circulation everywhere throughout the nation.

7. Burkina Faso:

Burkina Faso is likewise hard to come by of vitality, and just 13.1% of its populace approaches power. In 2013, the World Bank conceded a $50 million credit to help the nation in its power supply advancement venture. This would incorporate the enhancement of the power supplies to around 40 country towns, by method for setting up new transmission lines. The objective is to build up a more dependable power framework that would enhance those in provincial territories lives in general.

6. Focal African Republic:

The Central African Republic has just 10.8% of its populace provided with power. The primary driver for this lack has been the string of continuous uprisings and military upsets seen there which have generated various financial emergencies.

5. Liberia:

Liberia additionally has a short supply of electrical vitality, and just 9.8% of its populace has power. The vitality supply in the nation is principally sourced (80%) from biomass, the greater part of which goes towards cooking and warming needs. In any case, the city of Monrovia has about 85% of its populace utilizing charcoal.

4. Malawi:

Malawi has a lack of foundation to supply country power as it is required , and just 9.8% of its populace approaches it. The administration's program under the Energy Sector Support Project has included investigations investigating including extra hydro-power stations, and also those controlled by wind, sunlight based, and bio-gas sources.

3. Burundi: 

Burundi is likewise hard to find of vitality, with just 6.5% of its populace approaching power. Albeit 90% of its aggregate populace lives in provincial zones, just a little percent there appreciate the advantages of power. Burundi's hydroelectrically created power supply endures every day control cuts amid the dry season also. Biomass utilization contributes about 94% of its vitality needs, and biomass consumed there incorporates fuel wood, charcoal, horticultural deposits, and bagasse. Elective power is provided by sun based and wind vitality.

2. Chad:

Chad has a lack of framework to supply genuinely necessary rustic power, and just 6.4% of its populace approaches the vitality product. Transportation and power are additionally ailing in most country zones. Power is to a great extent provided by geothermal plants, while fuel comes for the most part as wood. About 80% of the nation's populace works in the rural segment. Chad relies upon remote venture for its bigger tasks, for example, the Chad-Cameroon pipeline and the advancement of a few of its real oil fields.

1. South Sudan: 

South Sudan has just 5.1% of its populace getting a charge out of access to power. It has under 1% of its streets being cleared ones, and under 1% of the populace have formal, Western-style lodging as we would remember it too. Such a need for offices has been the consequence of 30 years of war and government disregard. The administration is currently attempting to draw in remote financial specialists to direct their fluctuated business adventures inside South Sudan.


Copper and Aluminum Bus-bar Size Selection Chart

What is Bus-bar?

Bus-bar is the common header where one or multiple sources poor the power also one or more sources can take power simultaneously; means bus-bar is a common bas that receive power and release power.

Literally, the bus bar is usually very thick wire or bar that leads from the power source and is the wire that every load in the system is connected to.

Bus-bar like a city water reserver where water accumulated and distributed from.

Types of Bus bar

Bus bar mainly classified into two, though the function is same.
1. In outdoor substation the bus bar is a kind of bulk sized aluminum conductor;
2. In indoor substation copper or Aluminum bar is used as bus bar.

Why Bus bar is required in electrical transmission network?


In electrical substations, the bus-bar is a common component where all the anchorages that have the same voltage level are connected. In an electrical transmission network it’s required an electrical node but it is physically impossible to connect all the bays- such as transmission lines, transformers, reactors, shunt capacitors, etc. into a single point. But, bus-bar system provide the best solution that can connect above all equipment together and this node is known as bus-bar system.

Sectionalized Double Bus bar Arrengement System
Typical Sectionalized Double Bus bar Arrengement System
The figure shows a typical substation with two main bus-bar with bus-coupler connection facility, also shows auxiliary bu-bar and outgoing feeder connection with isolator and circuit breakers. Different configurations in substations and multiple bus-bars are used to assure a constant operation even if a circuit breaker or any other element requires maintenance.

Copper Bus-bar Selection Chart

Electricity is usually sent over electrically conductive metal wires. Wire is more convenient, because we can put insulation on it and bend it around corners, move it around, string it between power poles, that sort of thing. But, sometimes wire isn’t the best option, it may would be easier if we used a solid conductor instead of wire which is bus-bar. The chart below shows a copper bus-bar selection procedure.


Copper Bus-bar Selection Chart

Aluminum Bus-bar Selection Chart

Using slabs of metal instead of cable has some advantages- we can bolt them into place using insulators, and just like a welding table we can attach a connector anywhere on the bus bar. The chart below shows the Aluminum bus-bar selection procedure.

Aluminum Bus-bar Selection Chart

What is the Advantages of Bus-bar Trunking over Cabling System?

1. Bus-bar trunking save the cost compare over cabling system
2. Bus-bar trunking reduce installation times on site compared to hard-wired systems.
3. Bus-bar trunking provides increased flexibility in design to future modifications.
4. Greater safety and peace of mind for specifiers, contractors and end-users.
5. Bus-bar trunkingit is easy to design/estimating and installation stage, also cost effective.
6. Distribution bus bar distributes power along its length through tap-off points along the bus bar, tap-off units are plugged in along the length of the bus bar to supply a load that could be a sub distribution board what reducing production down time.
7. Installed vertically the same systems can be used for rising-mains applications.
8. Certified fire barriers are available at points where the bus bar passes through a floor slab.
9. Very compact so provides space savings.
10. Protection devices such as fuses, switch fuses or circuit breakers are located along the bus bar run, reducing the need for large distribution boards and cables running to and from installed equipment.
11. Bus bar trunking can be installed with natural galvanized, aluminum, or painted finish.
12. Special colors to match switchboards or a specific color scheme are also available on request.
13. Uneven distribution of current takes place where multiple runs of cables are used in parallel.


RESIDUAL CURRENT DEVICES: WHAT IS RCD AND WHAT DOES IT DO?

What Is RCD or Residual Current Device?

RCD or Residual Current Device is a generic term which covers both RCCB (Residual Current Circuit Breaker) and RCBO (Residual Current Circuit Breaker with Overload).
Residual Current Device Connection Procedure
Residual Current Device Connection Procedure

RCD is a protective device in electrical system which automatically disconnect the supply system  when imbalance detected in the value of phase and neutral current. British Standard BS 7671 defined RCD is as below:
A mechanical switching device or association of devices intended to cause the opening of the contacts when the residual current attains a given value under specified conditions.
The protective device RCD actually protect- direct and indirect contact, fire and thermal effect.

For clear understand the difference between RCD and other broadly used Circuit Breaker, we should remember the  definition of RCCB, RCBO, ELCB, GFCI etc.

RCCB (Residual Current Circuit Breaker) is an electrical protective device that break or disconnects the circuit to become in safe mood whenever it detect an unbalance current flow between live and neutral conductor.

Generally in an electrical circuit which amount of current flow to the load from source through live or phase conductor, the same amount of current must be return to source from load. If not happen this, means some current passing to the earth due to faulty circuit; then RCCB breaks the circuit as quick enough to prevent any injury.

RCBO (Residual Current Circuit Breaker with Overload) is actually combined designed of RCD and MCB. RCD alone does not provide protection against overcurrent. Overcurrent protection is provided by a fuse or a MCB (Miniature Circuit Breaker), so RCBO combines the functions of overcurrent protection and leakage detection.

ELCB (Earth Leakage Circuit Breaker) is also known as GFCI (Ground Fault Circuit Interrupter) is designed to detect the current flowing through ground or earth wire.

MCB/MCCB (Miniature Circuit Breaker/ Molded Case Circuit Breaker) is a protective device for electrical distribution system that designed to protect a circuit from over current which would caused a serious damage equipment's.

Common Types Of RCD and Their Usages 

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We already mentioned RCD is a generic term for protective devices. Common types of RCD and their usages which incorporated with other devices is as below:


RCCB 
Residual current circuit breaker which not integral with over current protection. This device operates comparing the predetermined value of residual current; and mainly uses in consumers units and distribution boards.

RCBO
Residual current circuit breaker which integral with over current protection.This device operates comparing the predetermined value of residual current and incorporate over current protection, and mainly uses in consumers units and distribution boards.

SRCD
It is a socket-outlet or fused connection unit that is incorporated with RCD. Mainly uses in portable outdoor unit for protection against direct contact.

SRCBO

It is a socket-outlet or fused connection unit that is incorporated with RCBO. Mainly uses in portable outdoor unit for protection against direct contact.

PRCD

Portable Residual Current Device that provides RCD protection for any equipment connected with plug and socket. Mainly uses in socket-outlet.


CBR
Circuit Breaker that is incorporated with residual current protection. Mainly uses in distribution boards in larger installation.

According to the number of connecting poles RCD may be: two poles for single phase supply with phase and neutral; three poles for three phase supply and four poles for three phase supply with neutral.

How RCD Prevent Electrical Shock?

RCD can operate by very smaller current, typically 5 to 30 mili-amperes where it is several amperes  for a conventional CB (Circuit Breaker), it also possible to operate within very short time,  like as 25 to 40 mili-seconds which is faster than the minimum time required for an electrical shock.

Rated and Sensitivity Current of RCD

Don’t confuse about rated current rating and sensitivity current of RCD. Rated current mentioned in RCD according to the maximum sustainable load current that can carry. Actually rated current is as same as the conventional circuit breaker.

Unlike to others conventional circuit breaker, RCD bears one more current rating which is normally mili-ampere rating is sensitivity current. Sensitivity actually expressed rated residual operating current.
    • Rated sensitivity current 10, 30 mA uses for High Sensitivity;
    • Rated sensitivity current 100, 300, 500, 100 mA uses for normal Sensitivity;
    • Rated sensitivity current 10, 30 A uses for Low Sensitivity

How Fast Operate RCD?

RCD operating or breaking time depends on the groups characteristics of the devices. Basic idea for RCD, how fast it operates-
Minimum break time is immediate, and maximum break time 40, 150, 200 mili-second at 5 times, 2 times, rated sensitivity current respectively.

How Select RCD to Uses? 

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When the main objective of uses RCD is safety, then RCD selects depend on the degree of safety. Also need to consider the load characters. The common selection criteria of RCD according to sensitivity are given below:

10 mA RCD 
Uses for very sensitive devices like laboratory benches in school.


30 mA RCD
Uses for portable equipment, 230v or similar voltages bathroom/shower-room equipment, socket-outlet in bedroom/ workshop/ school laboratories, caravan & caravan park, under floor heating system etc.

100 mA RCD

Uses in TT earthing system where earth loop impedance is too high to for shock protection to be provided by an over current device.

300 mA RCD

Uses in busbar trunking system, mainly in TN & TT system.

500 mA RCD

Uses in agricultural and horticultural premises, any exhibition or shows where need to take extra care for cable protection.

2000 mA or Adjustable

Uses for special industrial or distribution system if design seek for requirements.

9 Ways Old Electrical Wiring Could Cause Significant Fire Hazard in Your Factory

How Many Fires Incident Happen Every Year All over the World?

It is very difficult to calculate the numbers of fire incident all over the world; because national fire incident reporting system of maximum countries has not enough to attend all fires even record each individual incident history. But we can imagine the volume of fire incident and fire-losses analyzing some example from yearly fire incident record of some developed countries like USA & UK.

Fire Incident Loss in the United States During 2017

(Source: Ben Evarts, NFPA Report October 2018)
United States fire departments responded to an estimated 1,319,500 fires in 2017. These fires resulted in 3,400 civilian fire fatalities, 14,670 civilian fire injuries and an estimated $23 billion in direct property loss (this figure includes a $10 billion loss in Northern California wildfires). There was a civilian fire death every 2 hours and 34 minutes and a civilian fire injury every 36 minutes 2017. Home fires caused 2,630, or 77%, of the civilian fire deaths. Fires accounted for four percent of the 34,683,500 total calls. Seven percent of the calls were false alarms; 64% of the calls were for medical aid such as emergency medical services (EMS) or rescues.
Every 24 seconds, a fire department in the United States responds to a fire somewhere in the nation.


UK Home Office Collected Information on Fire Incidents that attended Fire and Rescue Services.


This information covers fires, false alarms and other incidents attended by fire-crews, and the statistics include the numbers of incidents, fires, fatalities and casualties as well as information on response times to fires. The Home Office also collect information on the workforce, fire prevention work, health and safety and firefighter pensions.

Total incidents
Total incidents per 1 million people
Year
England
Scotland
Wales
Great Britain
England
Scotland
Wales
Great Britain
1999/00
929,573
..
..
..
18,958
..
..
..
2000/01
912,741
..
..
..
18,539
..
..
..
2001/02
990,793
..
63,907
..
20,036
..
21,960
..
2002/03
958,142
..
62,540
..
19,287
..
21,397
..
2003/04
1,016,028
..
63,832
..
20,351
..
21,729
..
2004/05
861,384
..
52,866
..
17,161
..
17,876
..
2005/06
843,734
..
52,485
..
16,673
..
17,676
..
2006/07
854,371
..
56,675
..
16,764
..
18,982
..
2007/08
791,746
..
55,086
..
15,409
..
18,324
..
2008/09
717,805
..
49,293
..
13,853
..
16,290
..
2009/10
680,634
103,781
46,341
830,756
13,040
19,836
15,249
13,739
2010/11
647,350
101,414
46,881
795,645
12,297
19,272
15,371
13,053
2011/12
606,937
91,558
39,997
738,492
11,429
17,275
13,055
12,014
2012/13
521,277
83,830
36,251
641,358
9,745
15,776
11,792
10,364
2013/14
526,803
84,907
38,599
650,309
9,780
15,937
12,522
10,442
2014/15
496,124
85,072
36,425
617,621
9,134
15,908
11,780
9,842
2015/16
529,433
88,869
36,750
655,052
9,664
16,540
11,858
10,355
2016/17
560,408
91,220
37,216
688,844
10,140
16,878
11,954
10,799
2017/18
565,717
91,695
36,764
694,176
10,171
16,903
11,764
10,818

If you analyze the national fire incident report for a particular period, you will find most of fire because of old electrical wiring. When your residence or business is housed in an historic building, or older than 20 years, you cannot say your electrical wiring is reliable, you are with old fashioned electrical wiring. You must set mind to replace the old electrical wiring. Reason why so many fires in older buildings are caused by their aging electrical. Here are some of the hazards of having old electrical systems in your business:

If you want to fight with fire after fired-


You Should Know all About Fire Extinguisher Using Guide.




If you want to prevent fire before fired-





01. Knob and Tube Wiring

Most of old buildings are old electrical wiring methods is known as “knob and tube” wiring. It becomes one of the significant fire hazard or electrical fires when it’s altered, chewed by rodents. 

02. Under Sized Wiring

Comparing old type’s appliances, the modern equipment and appliances consumed more energy that turned the old electrical wire and circuit breaker under sized.   This can result in the overloading of circuits, which can also cause electrical fires. Running new electrical wire in old house could reduce fire hazard.

03. Poor Insulation Resistance


Due to heating effect again and again for year after year, the wire insulation become poorer to the poorest. Wiring screws, nails, clamps others metallic parts simply become brittle or disintegrated from age, finally fire happened due to old fashioned electrical wiring. So, replacing old wiring by new, keep your factory free from fire hazard.

04. Poorly Modified Wiring



In older buildings, the old style electrical wiring, mainly those from the early twentieth century, it’s not uncommon for wiring, often types of electrical wiring in old homes by wiring technician who had no electrical training. 


05. Faulty Control Units

It’s not only the old house electrical wiring that is a fire risk, the electrical circuit controlling devices like circuit breaker also some times are very old fashioned or simply used fuse wire instated of modern circuit breaker. If your distribution panel hasn’t been upgraded recently, then it’s entirely possible that the switches and breakers that make up the circuits might be faulty. Select the perfect electrical control devices we reduce the fire hazard significantly.

06. Poor Electrical Design

Poor electrical design is another major problem for types of electrical wiring in old homes. If your building and wiring systems are too old, your electrical system may have been designed to meet codes that were in force 50 or even 80 years ago that not meet the recent electrical codes. So, think how to run new electrical wire in old house

07. Faulty Appliances

As per national fire incident reporting system, most electrical fires are caused by faulty electrical outlets and old, outdated appliances. Faulty switches, damaged or unsafe appliance cords and receptacles etc. are the main source of electrical fire.

08. Old Electrical Wiring Without Ground

Electrical Fifre due to poor and old wiring
Poor and Old Wiring Main Causes to Electrical Fire Incident

Most of the cases you will find old electrical wiring no ground, also removing the grounding plug from a cord so it can be used in a two-prong electrical outlet can also cause a fire. Proper grounding could reduce the electrical hazard significantly.

09. Extension cords 




Common fire incident from misuse of extension cords. Without considering the appliances capacity, just plugged directly into outlet and plugged into an extension cord for any length of time, we welcomed the fire hazard. 


Final Speech: Simple way to reduce the electrical fire hazard in your factory or residence to checking the electrical wiring system periodically and follow the national wiring codes. One more important note for you, if you notice any sign of an electrical problem, such as lights blinking, appliances that work irregularly, breakers that keep tripping, or a burning smell of a short circuit, do not try by self, just call an expert technician to rectify and keep hazard free.