Joey Perera – SOS Electricals http://www.sos-electricals.co.uk Mon, 15 Jan 2018 21:08:36 +0000 en-US hourly 1 https://wordpress.org/?v=4.5.13 http://www.sos-electricals.co.uk/wp-content/uploads/2015/08/cropped-SOS-Logo-MASTER-32x32.jpg Joey Perera – SOS Electricals http://www.sos-electricals.co.uk 32 32 What Are The Signs Of Electrical Hazard? http://www.sos-electricals.co.uk/blog/what-are-the-signs-of-electrical-hazard/ Mon, 06 Nov 2017 11:02:19 +0000 http://www.sos-electricals.co.uk/?p=17001 Electricity has been said to be a very good servant; but a terrible master! Electrical accidents at home or in the work place can be costly. At best, they can cause a scare or minor damage to electrical appliances. At worst, they can cause massive damage as well as loss of life. This is why electrical hazards should be nipped in the bud as soon as they are noticed. Never wait for an electrical fault to become serious before you have it repaired. And better still, never attempt to repair electrical faults unless you are a qualified electrician.

  1. Abnormal buzzing sounds; we’ve all experienced these abnormal buzzing sounds when we switch on switches. It could be the normal switch to your bulb, or the hot shower one. Whatever the case, buzzing noises in switches are a common indicator that something is not right. Always get a professional electrician to come and assess the switch and recommend whether anything needs replacement.
  2. Burning or acrid smell; anytime you notice or sense a burning smell especially one that resembles plastic burning, it is recommended that you instantly turn off all power. More often than not, this smell as a result of the cable insulations melting and the next thing that happens is a short circuit. Fires can also occur and spread pretty fast under such circumstances. Faulty cables and other appliances that are inserted in sockets tend to be the greatest causes of electrical related fires.
  3. damaged_wiresDelay in power flow; ever seen a switch that fails to work even after being turned on and you have to really press it in order for it to work? Or that faulty socket where you have to twist and turn your phone charger before the power starts flowing? Such should ring alarm bells in your mind; these could easily cause a short circuit or even damage your home electrical appliances with the fluctuating power surges.
  4. Lights turning themselves off and on; this is a rare occurrence, but one that we should never ignore nonetheless. You’ve probably ever seen some bulbs going on and then off intermittently without anyone switching them on or off. Usually, this is an indicator that there’s a faulty connection somewhere that needs to be fixed. Again, always ensure that a professional electrician rectifies such.
  5. Repeated damage of electrical appliances; although home electrical appliances do get damaged by power surges, this should always be accidental rather than patterned. If your electrical appliances have gotten damaged several times in a span of a few weeks or months, chances are that there is some faulty connection and wiring within the premises. Perhaps you want to consider inviting an electrician to come over and conduct the necessary tests. Such tests will determine among other things, the total amount of voltage flowing in, whether the cables are capable of handling such current, and what may be causing the constant power surges.

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Electrical hazards are best remedied promptly; never wait for an anomaly you’ve noticed to get serious before seeking help. It could be too late.

 

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How to Locate Underground Cable Faults http://www.sos-electricals.co.uk/blog/how-to-locate-underground-cable-faults/ Mon, 30 Oct 2017 05:47:53 +0000 http://www.sos-electricals.co.uk/?p=16989 Instances of underground cable faults are inevitable. Once in a while, power transmission as well as distribution will be hindered by a fault that may not be obvious to the naked eye. Although there are new detection technologies that an electrician can rely on, at the end of the day, he or she will have to rely on their own skills and experience to pinpoint where the fault is. Each scenario calls for a particular method of detection; the fact that these cables are often buried underground only makes the task more difficult. Luckily, there a few reliable methods that one can use in underground cable fault detection;

Underground cables

 

 

 

  1. Sectionalizing; sectionalizing is the oldest, easiest ways to detect where the fault is within an underground cable. Like the name suggests, it entails cutting and physically splicing up the cable. Usually, the cable is cut into smaller sections and each piece is tested via an ohmmeter or a tester. By testing each of the cable pieces, you’re able to narrow down on the exact part that requires repair. The only major disadvantage with this method of cable fault detection is that it is laborious and means digging out the underground cable repeatedly.
  2. Thumping; this is not a very effective method, but it is worth giving a try anyway. A high voltage is supplied through the faulty cable, and the electrician listens for any noise above ground. For you to clearly hear the noise made by the current flow, the voltage has to be really high, sometimes up to 25kV. This may damage the cable’s insulation and should thus be done in moderation. If successful, this detection method saves you from the laborious task of splicing the cable.
  3. TDR; Time Domain Reflectometry is one of the latest technologies used to locate a faulty underground cable. It works by sending low energy signals via the faulty cable. In theory, a perfectly functioning cable sends back that signal within a known duration and manner. The TDR screen helps the electrician utilize the given data to estimate where a cut or splice may have occurred within the cable. This is the only major disadvantage of TDR; for all its technological advancement, it doesn’t pinpoint the exact lotion of a fault. Besides, it is not helpful if you’re dealing with faults that have resistance exceeding 200 ohms. This means that locating minor faults that haven’t qualified to outright power shorts is a tall task for TDR.

Like in all electrical matters, locating an underground cable fault should only be done by a qualified electrician or engineer. He or she should always have the right tools for the job, and due diligence employed at each stage of the task. Usually, the main power should be off when the fault tests are being conducted, unless otherwise. It is also always better to rectify underground cable faults when the ground is dry, compared to when it is wet or it has rained heavily.

 

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How To Effectively Dispose Scrap Wires And Excess Parts http://www.sos-electricals.co.uk/blog/effectively-dispose-scrap-wires-and-excess-parts/ Mon, 23 Oct 2017 08:35:38 +0000 http://www.sos-electricals.co.uk/?p=16979 At the end of every electrical related job, there are always plenty of scrap wires and excess parts that will be left behind. More often than not, we are so preoccupied with enjoying the newly connected power to critically consider on the best way to dispose of such leftovers. Scrap wires can be hazardous if not properly disposed off; it’s worse if you let them rust or get buried in the soil as they may easily cause tetanus infected wounds. Still, you can’t think of burning them as most emit toxic fumes from the insulation used to cover the cables. As such, due caution must be excised when it comes to disposing off of scrap wires.

  1. Recycling; the first and most recommended way of disposing of scrap wires and excess parts is by recycling them. Wires and metal are some of the most readily recyclable parts. You can do a quick online research to find out what recycling plants are located near you; most will readily come over to pick such excess parts for recycling. You can make a few coins from selling these scrap wires and excess parts to the recycling plant.

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  1. Selling; secondly, you can start by sorting out the extra parts to put aside what is usable and what is not. Aluminum, copper, iron and other metals are always on demand in the market. You just need to research and know the current market rice. You may not sell the wires at the exact prices you bought them at; just get a buyer who’s willing to pay a fair price for them. Remember that with electrical cables and wires, these can be easily spliced up and joined to form one long cable. Thus there’s value at all times in scrap wires left after an electrical job.
  2. Future use; lastly, electrical problems in most premises occur as emergencies. One day everything is fine, the next day everything is a mess. This is when you start running over looking for an electrician, buying wires and spares to get the job done. Thus resist the urge to dispose of all scrap wires left behind. Try and store them in your garage or any other room that you hardly use. Trust you me, a day will come when you’ll be desperate for a piece of cable and this will save your day. Electrical wires don’t expire quickly and you can store them for years, waiting for the day you’ll desperately need to use them.

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If you have an electrician working for you, there are times you can agree with him or her to slash off a bit of what they were to charge you, and they’ll take away some of the scrap wires They are better placed to sell them off because they have contacts in the right places; at times they may use the same on another household that requires the same. This therefore means that whichever way you look at it, disposing of scrap wires and excess parts should never really trouble you.

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Dangers Of Misusing Kitchen Appliances http://www.sos-electricals.co.uk/blog/dangers-of-misusing-kitchen-appliances/ Thu, 19 Oct 2017 09:05:01 +0000 http://www.sos-electricals.co.uk/?p=16973 Did you know that half of all fires reported in homes originate from the kitchen? This tells you just how much you need to excise caution when it comes to handling kitchen appliances. Microwaves, food processors, ovens, electrical stoves; you should always handle such with great caution. It makes sense to have a reputable electrician who’s on standby 24/7, who can be called in case you experience or notice signs that all is not well. Having said that, there are dangers involved when you misuse your kitchen appliances;

  1. Damage to the appliances; misusing kitchen appliances is the fastest way to damage them and render them unusable. This could mean that you have to spend more to have them repaired, or in worst case scenarios, be forced to buy some new ones. Power surges or faulty cables are an example of scenarios that may get your kitchen appliances damaged. To avoid such, ensure that your home wiring is done by a professional.
  2. Injury and bodily harm; another danger of misusing your kitchen appliance from touching a stove or oven without knowing that it’s hot. Steam from dishwashers can also cause worse harm than even direct flames.  Against is being burnt or even electrocuted.  Contact burns are the most common, , faulty wiring and connections can render even the best manufactured kitchen appliances dangerous.
  3. Fires; most kitchen fires occur as a result of the kitchen appliances either being misused, or the power connection causing random fires. Whatever the case, all fires are dangerous and can quickly spread to other areas of the house. NEVER try to put out a kitchen fire with water under any circumstances; this only makes the fire more intense. Baking soda can be used to put off grease fires that may pop up in the oven or grill, while fire extinguishers should be used to put out fires that are getting out of control. Regular inspections by a professional electrician can help detect and rectify any problem with your wiring or electrical appliances, before they get out of control.

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Safety starts with you;

90% of all accidents involving kitchen appliances can be avoided. How? First, by constant inspection from a professional electrician and secondly, following all the safety features given. Most kitchen appliances like microwaves, electric cookers, dishwashers, ovens; each has safety precautions to guide you on its use. Some of the accidents are purely borne out of ignorance or lack of keenness. For instance, warming food in a plastic bowl in a microwave and then turning it on to the maximum is a recipe for disaster! The plastic will only melt and damage your microwave’s interior. Similarly, if you’re using a water heater in the kitchen and there’s a power blackout, ALWAYS unplug it or switch off the switch! Many home owners have left their heaters with the switch on and when lights returned, the heater ended up causing a huge fire! Thus, always be keen and cautious when handling kitchen appliances; have a reputable electrician inspect everything once in a while.

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What should you do before using electrical equipment http://www.sos-electricals.co.uk/blog/things-to-do-before-using-electrical-equipment/ Wed, 11 Oct 2017 08:04:26 +0000 http://www.sos-electricals.co.uk/?p=16965 Introduction

In this new millennium, post-modern times demand the use of modern technology in everyday industrial, commercial and home activities. The latest in innovative trends offer machinery, equipment and appliances that make work easier, efficient and effective. These equipment in order for them to run smoothly and have their purpose fully, have to be well maintained and used in the correct way for them to survive their lifespan and do their work with a 100% efficiency factor. Most of these equipment function using electricity. Electric current is the force that drive such equipment and it is therefore advisable to understand how to manage and service electricity based equipment. Training and instructions on the use of electrical equipment is key for industrial and commercial personnel as well as at home.

Work well using electrical equipment

Before putting in to action any electrical equipment, it is recommended to make sure that the work or home environment is safe and conducive. These are the actions to follow to ensure that happens:

  • One should perform a risk assessment in order to pinpoint and identify potential risks and hazards that may occur and the consequent control measures you should use. The work or home environment should be thoroughly scoped to ascertain that use or introduction or electrical equipment will not bring risks and hazards that may cause harm or damage.
  • It is very vital to check and confirm that the electrical equipment is suitable for the work or home environment and for its intended purpose. The specifications of the equipment should be read and assurance that it is suitable and will function determined. Things such as power rating are key so that they do not overload circuits.
  • The electrical equipment should be carefully examined to ensure that it is in good condition before use. Faults and risks should be determined before the equipment goes in to service. This will prevent risks and hazards from occurring and also lead to repair or replacement of damaged equipment.
  • It is important both at home and in the work place to ensure that the electrical supply for the main is suitable for use with all the electrical equipment within that premise and its electric circuits. Regular tests should be performed to reduced risks and faults. This is done by a licensed professional who is able to vividly identify faults in the electrical system and fix it.
  • Incorporation of a Residual Current Device in the electrical system and circuit of the home or work place will reduce the chances of the electrical hazards within the circuits when electrical equipment is used or introduced to the circuits. This is installed in the main switchboard hence the system is protected from the main source permanently.
  • It is a requirement that the user of the electrical equipment is well trained and proficient in the use of such equipment and has experience in handling it. The user should practice safe work or home environment protocols and have the capacity to protect others in the event of any hazards. The user should also have protective gear on at all times while using the equipment.

 

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What is electrical shock hazard http://www.sos-electricals.co.uk/blog/what-is-electrical-shock-hazard/ Sat, 30 Sep 2017 17:15:11 +0000 http://www.sos-electricals.co.uk/?p=16960 An electric shock can be defined as the feeling, sensation, physiological response or injury to the human body caused as a result of electricity or an electric current passing through it. This reaction takes place when the human body or part of the human body comes into contact with a power source or source of electricity and the current is substantial enough to pass through the skin, muscles, hair and the blood stream which has a lot of elements in it that conducts electricity and elements that do not conduct.

Negligible or small electric currents cannot be felt by the human body for any response. When the electric current increases in magnitude and becomes stronger, and passes through the human body, it sparks a response and the victim is electrically shocked and in the event, he/she as holding the power source that is energized, he/she may fail to release it owing to continued electrical shock.

Larger electric currents may result in heart problems such a fibrillation as well as damage to other body tissues. Electrocution occurs when death is the end result of electric shock.

Electric shock can also be the damaging exposure to electric current which travel through the nervous system of the human body and cause tissue and muscle damage in sections and patches. The end result of this is a complex regional pain syndrome anywhere on the body and is random depending on the magnitude of electricity and extent of the damage.

electrical shock hazard

What determines the extent and severity of an electric shock

The extent to which an electric shock damages the human body and the severity of the physiological response is dependent on the current flowing through the human body a factor of the magnitude of electricity from the source. This is impacted by the electromotive force from the power source measure in volts and the contact resistance measured in ohms. The following formula is observed:

Current(I) = Electromotive Force(E)/Contact Resistance(R)

Electric Shock Values

  • Electrical Sensation- tingle sensation occurs at about 0.25 to 0.5 mA for an adult female and between 0.50 and 1 mA for an adult male.
  • Uncomfortable sensation- current over 1-2 mA is very uncomfortable to both sexes.
  • Maximum ‘Let-Go’ Level- the maximum ‘Let-Go’ threshold level for a female is approximately -9 mA and for a male it is about -15 mA.

The ‘Let-Go’ threshold is defined as the current where the human body loses control of all the muscles and the electric current passing though the human is the one that causes the muscles to contract and relax. This continues until the electric current is no longer present.

Types of electric shocks

Electric shocks affecting the human body have two sources. This can be a direct contact source where the human body comes into contact with an exposed conductor or conductive part of an appliance or a circuit. This is where mitigated laws for insulation come in. The second is an indirect contact source which is prevented when an electrical system, circuit, appliance or equipment is properly earthed to offer an alternative path for electric current.

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Seven easy ways to prevent home electrical hazards http://www.sos-electricals.co.uk/blog/prevent-home-electrical-hazards Tue, 19 Sep 2017 03:47:02 +0000 http://www.sos-electricals.co.uk/?p=16942 For the home in this modern era, electricity is the most dangerous and scariest hazard. Electricity moves at speeds of nanoseconds without any noise and smell and when it strikes it more often than not leads to destruction of property and loss of life. It is not all bad though, since electrical work at home is usually safe when proper safety measures are adhered to.

To prevent electrocution at home, shut off power to the appliances not in use. Since some appliances hold charge when no power is going through them, further precaution is to be considered for those.

It is important to know how to turn off appliances and equipment reducing the risk of electrical shock and damage. It is important also to familiarize with the wiring and circuit of the home.

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Here are seven easy ways to protects the home from electrical hazards:

  • Have a licensed and professional electrician check the home circuit and control box, whence, he/she can install a safety switch inside the home as a replacement of the external fuse box. The electrician or a responsible adult should replace frayed, worn out or damaged cords and insulation within the home.
  • Ensure an appliance is turned off before the appliance is unplugged from the socket within the home circuit. And when unplugging these appliances, it is advisable to hold the plug of the appliance and not the cord. It is also recommended to turn appliances off when not in use or service.
  • Take faulty or damaged appliances to the electrician to be repaired or just responsibly dispose them. One should not attempt to repair such appliances unless they are trained professionals. A licensed electrician should be called for all repairs and assistance such as switches and sockets, light fittings and power points.
  • It is of utmost importance to ensure that outdoor appliances never come in to contact with water, pools of water or any form of moisture. It is also recommended when using electricity in wet areas to always were insulated gear such as rubber-soled shoes and insulation gloves. Also make sure to unplug outdoor appliances after using them or when not in use.
  • As a rule of thumb, never ever touch sockets, switches, power points and appliances with wet hands since there is a high risk of electrical shock and damage. It also not advisable to handle special appliances without following instructions such as folding or crumpling an electric blanket that may lead to a short circuit.
  • At all the power points and switches, there should be use of plug-in covers that will close off access to the live conductors at this point and therefore children and even adults can not interfere with them through activities like poking in them or inserting objects that will aid in plugging in appliances.
  • It is advisable to tag or label electrical equipment and appliances that have high risk of causing electrical shock as with a danger tag. When plugging in appliances, ensure the power points and the sockets are in the off position.
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Electrical hazards and safety measures http://www.sos-electricals.co.uk/blog/electrical-hazards-and-safety-measures/ Sat, 16 Sep 2017 15:48:46 +0000 http://www.sos-electricals.co.uk/?p=16931 Electricity is an essential asset in this modern world with the advent of technology and innovation. Electricity is crucial for the industrial sector and for the homes and small businesses. Its importance cannot be overlooked and it has become part and parcel of day to day life. It is therefore a necessity to understand electricity, how it works and its dangers.

Electricity is very dangerous and with the right condition can cause serious injury, death and destruction of property. Electrical injuries to the human body includes electrocution, electrical shock, burns and falls. Electrocution is the third leading cause of work-related deaths among workers and also at home. Electricity not only damages the human body, but can as well destroy property such as appliances and equipment. Electricity can lead to fires that burn entire buildings down.

Electrical Hazards

Electrical Hazards

  • Exposed electrical parts are a great hazard since the live conductors can be touched and cause harm.
  • Overloaded circuits are an electrical hazard since they increase the probability of a fire to occur. This occurs in scenarios such as many appliances plugged into one circuit.
  • Defective insulation proves zero or negligible protection of the electrical circuit and also increases the chances of live contact with people hence increasing hazard and damage.
  • When an electrical system lacks proper grounding, there is no earth connection to such a circuit which creates a dangerous hazard.
  • Use of power tools that are impaired and lack insulation as a result of poor maintenance cause electrical shocks since they are energized but lack grounding.
  • Overhead power lines running through our streets and roads and their transformers are not insulated and run a high risk of electrocution.
  • The existence of wet conditions spells danger when it comes to electrical systems since they make a person become part of the circuit for electric current.

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Safety Measures

  • Practice safe work environment procedures such as inspection of insulation cords prior to their use, staying away from all uninsulated conductors, not to overload a circuit and not having on metallic jewelry and objects around electrical equipment.
  • In the work place such as industries, it is vital to train all personnel concerning electricity, especially those employees who deal directly with electrical equipment. They should be familiar with the standards of the National Fire Protection Association and its accords.
  • Incorporation of overcurrent protection devices such as circuit breakers, fuses and ground fault circuit interrupters within an electrical circuit that will ensure maximum safety of the system.
  • Proper insulation of the conductors in a circuit as well as cords of electrical appliances and equipment reduces the risk of electrical hazards such as electrical shocks and damage to appliances. Power tools should also be properly insulated and maintained.
  • Grounding of the electrical system within a household or a workplace ensures the circuit is complete and earthed to the ground hence the surge or overflow of electricity is compensated and failure of the electrical system is minimized.
  • In the event of an electrical fault, seek the assistance of a professional licensed electrician.

 

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