Understanding the Danger of Electrical shock

The 2  Major hazards attributed to electrical equipment and wiring are electrical shock and fire. Electrical shock occurs when the body becomes part of the electric circuit, either when a part of your body comes in contact with both of the active component (Active/Neutral)wires of an electrical circuit, or one wire of an energized circuit and the Earth wire (or grounded wire)…., or a foreign conductive object that has become energized by contact with an electrical conductor.

The severity and effects of an electrical shock depend on a number of factors, such as the pathway through the body, the amount of current, the length of time of the exposure, and whether the skin is wet or dry (ie sweat). Water is a great conductor of electricity, allowing current to flow more easily in wet conditions and through wet skin.

240V can kill!The effect of the shock may range from a slight tingle to severe burns to cardiac arrest. The chart below shows the general relationship between the degree of injury and amount of current for a 50-cycle hand-to-foot path of one second’s duration of shock. While reading this chart, keep in mind that most electrical circuits can provide, under normal conditions, up to 20,000 milliamperes of current flow. So only a very small percentage of current leaking to earth can cause harm if touched by your body… as little as 30 milliamperes of current can KILL !!!

Current
Reaction
1 Milliampere Perception level
1-5 Milliamperes Slight shock felt; not painful but disturbing
6-29 Milliamperes Painful shock; “let-go” range
30-150 Milliamperes Extreme pain, respiratory arrest
151-4,300 Milliamperes Ventricular fibrillation
4,300+ Milliamperes Cardiac arrest, severe burns & even death

In addition to the electrical shock hazards, sparks from electrical equipment can serve as an ignition source for flammable or explosive vapors.

Even loss of electrical power can result in extremely hazardous situations. Flammable or toxic vapors may be released as a chemical warms when a refrigerator or freezer fails. Fume hoods may cease to operate, allowing vapors to be released into the work area.  So take care with your electrical equipment and consider all contingencies in the operation of that equipment.

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Of course the best way is to ensure that your appliances are not hazardous in the first place by ensuring that not dangerous electrical currents are present on the external parts of the appliance. We at Tested & True ~ test & tag come to your work place at a time convenient to you. We can do an assessment of your Electrical Hazards it can be conducted at the same time as we test and tag your Electrical Equipment. We provide a Full Report with recommendations to clear up current Hazards and how to prevent future risks. Call and ask for a quote. 040 7605568

Tested & True ~ test & tag  Adelaide uses the very latest in Portable Appliance Testing…The STC Pro Logger 2 it can perform RCD testing, Earth Leakage Detection and Run Testing all in one neat piece of equipment. On top this all our Technicians are Trained to National Standard UEENEEP008 in test & tag operations by Intertag in Sydney NSW, all our Equipment is in good repair and in Calibration. Most of all we pride ourselves on our Knowledge of OH&S legislation and the current Australian Standards ensuring that you get Quality Service at a competitive price.

Call Now Mobile 040 7605568

Visit us at http://www.testedandtrue.com.au located in Lonsdale, South Australia

Peter Hill Manager Tested & True ~ test & tag Manager SA 0407605568 January 2017

National Coverage through the Safety Services Network (SA State Member)

SSN

Peter Hill Manager Tested & True ~ | test & tag | Lonsdale | South Australia |

What Do I need Surge Protector or UPS?

Surge protectors … will protect your equipment from sudden  and dangerous in creases  or spikes in Voltage… They effective in shunting the excess power to earth in the event of the voltage increasing beyond 240 Volts (Australian Single phase appliance line voltage) … so that your equipment safe by making sure only a designated amount of power actually reaches your connected equipment. You can buy them as single-outlet units or multi-outlet power boards.

Surge_protection_board

An Uninterruptible Power Supply ( UPS) has that same qualities , but they provide a back-up power supply for a limited amount of time in case of a blackout or in some more sophisticated units  brown out protection (power goes low <240V) smoothing out any power fluctuations. This means if the power fails you have a good amount of time to save your work on your computer and shut it down normally.

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Here is the very latest findings from (ACCC) The Choice Website https://www.choice.com.au/electronics-and-technology/computers/computer-accessories/buying-guides/ups-and-surge-protectors

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WE can give you advice on choosing an UPS or Surge Power board to suit your Requirements…. and At Tested and True …we come to your work place at a time convenient to you. We can do an assessment of your Electrical Hazards it can be conducted at the same time as we test and tag your Electrical Equipment. We provide a Full Report with recommendations to clear up current Hazards and how to prevent future risks. Call and ask for a quote. 040 7605568 Tested & True ~ test & tag Adelaide uses the very latest in Portable Appliance Testing…The STC ProLogger 2 it can perform RCD testing, Earth Leakage Detection and Run Testing all in one neat piece of equipment. On top this all our Technicians are Trained to National Standard UEENEEP026 in test & tag operations , all our Equipment is in good repair and in Calibration. Most of all we pride ourselves on our Knowledge of OH&S legislation and the current Australian Standard AS/NZS 3760:2010 ensuring that you get Quality Service at a competitive price. Call Now Mobile 040 7605568

Visit us at http://www.testedandtrue.com.au located in Lonsdale, South Australia

Peter Hill Manager Tested & True ~ test & tag Manager SA 0407605568 May 2016

 

Uninterruptable Power Supplies (UPS) Buying Advice

Uninterruptable Power Supplies (UPS) Buying Tips

Summers here! … and Summer In Australia means Power Shortages and often leading to Blackouts (no power) or brownouts (low power ie low voltage and current) sometimes these are planned by the Electricity Suppliers to share the extra load during Hot Days… sometimes they occur unplanned because of overloaded or failed equipment either way Your expensive computer or in the case of a business your Server and the data in it could be rendered useless. UPS is the easiest way to protect your hardware and data. For a better and more thorough protection, you need a UPS. It isn’t intended to power you through a blackout though. For that, you would need a generator. Rather, a UPS will let you save your work and power down safely.

A UPS is designed to protect your computer you against such power fluctuations and more importantly, power up your computer even when there is no electricity. Here are a few tips that should help you make a more informed UPS purchasing decision.

  1. Power Outlets

When purchasing a UPS, make sure the power rating is right for your equipment. If you buy one that is rated too low, you might run out of juice before you can power down. Most UPS devices are designed to provide 10 minutes of power. When selecting a UPS, you need to look at the VA rating — or amps multiplied by voltage (240v). The amp rating should be listed on your computer. Add up the VA ratings of everything you will connect to the UPS, then purchase a UPS with a VA rating 20-25% higher. If you are a home PC user, look for a UPS with a 1000-1400 VA rating.

  1. Choose a good length Of Backup time

Don’t expect your UPS to keep your PC running all day. Most UPSes are engineered to provide you a backup time of around 10 to 20 minutes. What they essentially do is save your work when there is a power outage and avoid an abrupt shutdown that could mess up your computer settings. Choose the UPS that meets your backup time demands.

  1. Other features of a UPS

When you are buying a UPS, ask the vendor about more features than just power. This will help you in finding the UPS which has that one additional option that will help you in your buying decision. Of course, the best feature is Automatic Voltage Regulation (AVR) which isolates your PC from voltage fluctuations that lead to computer disturbances. A UPS with AVR conditions the incoming power before being fed to the PC’s Switch Mode Power Supply (SMPS). Most UPSes also automatically initiate a scheduled shutdown sequence when the power is lost, after saving your work, to prevent damage to the computer hardware.

  1. Warranty

Obtain a guarantee before buying a UPS. Undue delays in replacements can affect business. Some vendors offer onsite warranties, where they replace the batteries at your place. If you are planning to use the UPS at work, go for a longer warranty term.

  1. Battery replacement

The general rule is three years. But if you are experiencing low backup times more frequently, you could get the battery replaced immediately if it’s under warranty. If you are facing no problems, expect your battery to work for three years. Its advisable to buy replacement battery cartridges while you are buying the UPS. These cartridges will breathe new life into UPS systems suffering from expired or weak internal batteries.

  1. Power up

Contrary to the myth, its perfectly fine to leave the main switch on even when you are no longer working and the computer is shut down. However, its best to pair your UPS with a voltage stabilizer for additional safety.

  1. Software reporting

The software provided with the UPS is not always accurate with its reports. So don’t listen to it when it says your battery needs to be replaced even though you’ve never experienced low backup times. These faulty reports shouldn’t worry you because they may be trying to get you to purchase the company’s product more frequently (a common problem with print cartridges.) The software is good at its essential function of shutting down the PC properly and saving your work, but you may be the best option to determine whether its time to change the battery.

  1. Tips and tricks

Do not overload the UPS by, for example, connecting external devices like the printer, scanner and the fax machine. NEVER plug a printer into the battery backup system. To optimize the charge of your batteries, you should discharge them completely at least once a month. And lastly, make sure the UPS is properly grounded all the time to prevent any electrical disasters.

  1. Shop around compare specifications against Price..

Standby UPSs are available in the range of 300VA to 500VA for office use, and up to 2KVA to 3KVA for workstations and large servers. Inexpensive standby UPSs ranging in price from $50 to $125 are used by millions of users of personal computers all over the world. Some of them include brands like Belkin, American Power Conversion (APC), Cyber Power, Data Shield, EFI, NCR, SAFE, Pacific Power, Sola and UP Sonic.

Conclusion

Bsically, there are two kinds of UPS systems. The Standby Power System (SPS) and Online UPS System. If you are a home user, go for the relatively cheaper SPS. The price of an online UPS is three to five times that of a standby UPS with the same power rating. For servers, buy an online UPS (online means outgoing power is always drawn from the battery). Expect to pay between $150 and $1,000 for an online UPS. The higher the VA rating, the more you’ll pay. You might also want to consider buying one with advanced-battery features. These features include intelligent-battery management, battery-replacement indicator, and hot-swappable user-replaceable batteries.

Remember

An UPS isn’t intended to power you through a blackout.. For that, you would need a generator. However an UPS is a cost effective way to let you save your work and power down safely.

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Of course the best way is to ensure that your computer and UPS systems are not hazardous in the first place by ensuring that no dangerous electrical currents are present on the external parts of the appliance or hidden faults inside. We at Tested & True ~ test & tag come to your work place at a time convenient to you. We can do an assessment of your Electrical Hazards it can be conducted at the same time as we test and tag your Electrical Equipment. We provide a Full Report with recommendations to clear up current Hazards and how to prevent future risks. Call and ask for a quote. 040 7605568

Tested & True ~ test & tag  Adelaide uses the very latest in Portable Appliance Testing…The STC ProLogger 2 it can perform RCD testing, Earth Leakage Detection and Run Testing all in one neat piece of equipment. On top this all our Technicians are Trained to National Standard UEENEEP008 in test & tag operations by Intertag in Sydney NSW, all our Equipment is in good repair and in Calibration. Most of all we pride ourselves on our Knowledge of OH&S legislation and the current Australian Standards ensuring that you get Quality Service at a competitive price.

Call Now Mobile 040 7605568

Visit us at

www.testedandtrue.com.au

or our Newsletter http://testedtruenewsletter.blogspot.com/

Peter Hill Manager , Tested & True ~ test & tag Lonsdale SA November 2015

Understanding the Danger of Electrical shock

The 2  Major hazards attributed to electrical equipment and wiring are electrical shock and fire. Electrical shock occurs when the body becomes part of the electric circuit, either when a part of your body comes in contact with both of the active component (Active/Neutral)wires of an electrical circuit, or one wire of an energized circuit and the Earth wire (or grounded wire)…., or a foreign conductive object that has become energized by contact with an electrical conductor.

The severity and effects of an electrical shock depend on a number of factors, such as the pathway through the body, the amount of current, the length of time of the exposure, and whether the skin is wet or dry (ie sweat). Water is a great conductor of electricity, allowing current to flow more easily in wet conditions and through wet skin.

240V can kill!The effect of the shock may range from a slight tingle to severe burns to cardiac arrest. The chart below shows the general relationship between the degree of injury and amount of current for a 50-cycle hand-to-foot path of one second’s duration of shock. While reading this chart, keep in mind that most electrical circuits can provide, under normal conditions, up to 20,000 milliamperes of current flow. So only a very small percentage of current leaking to earth can cause harm if touched by your body… as little as 30 milliamperes of current can KILL !!!

Current
Reaction
1 Milliampere Perception level
1-5 Milliamperes Slight shock felt; not painful but disturbing
6-29 Milliamperes Painful shock; “let-go” range
30-150 Milliamperes Extreme pain, respiratory arrest
151-4,300 Milliamperes Ventricular fibrillation
4,300+ Milliamperes Cardiac arrest, severe burns & even death

In addition to the electrical shock hazards, sparks from electrical equipment can serve as an ignition source for flammable or explosive vapors.

Even loss of electrical power can result in extremely hazardous situations. Flammable or toxic vapors may be released as a chemical warms when a refrigerator or freezer fails. Fume hoods may cease to operate, allowing vapors to be released into the work area.  So take care with your electrical equipment and consider all contingencies in the operation of that equipment.

<<<<<<<<<<<<<<<<<<<<<<<<<< 0 >>>>>>>>>>>>>>>>>>>>>>>>>>>

Of course the best way is to ensure that your appliances are not hazardous in the first place by ensuring that not dangerous electrical currents are present on the external parts of the appliance. We at Tested & True ~ test & tag come to your work place at a time convenient to you. We can do an assessment of your Electrical Hazards it can be conducted at the same time as we test and tag your Electrical Equipment. We provide a Full Report with recommendations to clear up current Hazards and how to prevent future risks. Call and ask for a quote. 040 7605568

Tested & True ~ test & tag  Adelaide uses the very latest in Portable Appliance Testing…The STC ProLogger 2 it can perform RCD testing, Earth Leakage Detection and Run Testing all in one neat piece of equipment. On top this all our Technicians are Trained to National Standard UEENEEP008 in test & tag operations by Intertag in Sydney NSW, all our Equipment is in good repair and in Calibration. Most of all we pride ourselves on our Knowledge of OH&S legislation and the current Australian Standards ensuring that you get Quality Service at a competitive price.

Call Now Mobile 040 7605568

Visit us at

www.testedandtrue.com.au

or our Newsletter http://testedtruenewsletter.blogspot.com/

Peter Hill Manager , Tested & True ~ test & tag Lonsdale SA October 2015

Surge Power Board Protection 101

We have such a large number of gadgets today and they nearly all have sensitive electronic components particularly for our entertainment and computing equipment. We are told that we need to protect that equipment for Electrical surges from our mains power supply. The easiest and most convenient way is to buy a Surge Protected Power Board … However, not all surge protectors are alike, and some even put your gadgets at risk. So what is the Difference between a Surge Protected Power Board and a plain power board? Firstly, not every power board is a surge protected power board. It may sound basic, but it’s a fundamental piece of knowledge you’ll need. While a power board just splits your outlet into multiple ports, a surge protector is designed to protect your computer, TV, and other electronics against power surges and any interference or noise on your power line. Power surges may not be an everyday event, but they’re common enough that they can damage your equipment. What to look for: Look for a Label that states its Surge Protected and also look for a led light on the board which indicates that it the Surge Protection is working when the board is plugged in. This will act as a check if there has been major surge event in the Mains power supply.  If the led light goes off the Surge protection may be blown and it will indicate that it is no longer working even though the board is still supplying power to connected devices. Buy one with right number of outlets they come in typically 6,8,12 outlets (this avoids connecting many boards together compromising your protection and potentially overloading power to appliances from the power-point.) DO NOT buy single a single outlet device they are usually cheap and provide poor protection your expensive appliances. Do not connect High current appliances to a Surge Protected power Board they are designed for sensitive Low Power Devices (Tvs, DVD Players, Game Consoles, Hi-fi, Computer Devices etc) for example, do not connect Kitchen appliances, Air Conditioners, Tools and Workshop equipment to a Surge Protected Power Board Always check the design specifications

  • Energy absorption/dissipation – This rating, given in joules, tells you how much energy the surge protector can absorb before it fails. A higher number indicates greater protection. Look for a protector that is at least rated at 200joules. For better protection, look for a rating of 600 joules or more.
  • Clamping voltage. The clamping voltage is the voltage that will trigger the surge protector—or essentially when the surge protector wakes up and starts absorbing energy. Look for something around 400 V or less. Lower is better here. Finally, see if response time is listed in the product details—it’s good to know, and lower is better
  •  Response time – Surge protectors don’t kick in immediately; there is a very slight delay as they respond to the power surge. A longer response time tells you that your computer (or other equipment) will be exposed to the surge for a greater amount of time. Look for a surge protector that responds in less than 20 nanoseconds.
  • As mentioned before,It is best to look for a Surge protected board with an indicator light that tells you if the protection components are functioning

Importantly: Make sure you’re informed before you buy, and read the back of the box or the product details before you buy anything. You don’t want to invest in a surge protector only to find out that it’s far too weak to protect your devices, or it’s a surge protector in name only. Remember,  the most expensive is not always the best. The best thing to do is figure out what you need to protect and buy accordingly.

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At Tested and True …We test Safety Switches as well as other electrical testing services. We come to your work place at a time convenient to you. We can do an assessment of your Electrical Hazards it can be conducted at the same time as we test and tag your Electrical Equipment. We provide a Full Report with recommedations to clear up current Hazards and how to prevent future risks. Call and ask for a quote. 040 7605568 Tested & True ~ test & tag Adelaide uses the very latest in Portable Appliance Testing…The STC ProLogger 2 it can perform RCD testing, Earth Leakage Detection and Run Testing all in one neat piece of equipment. On top this all our Technicians are Trained to National Standard UEENEEP008 in test & tag operations by Intertag in Sydney NSW, all our Equipment is in good repair and in Calibration. Most of all we pride ourselves on our Knowledge of OH&S legislation and the current Australiand Standard AS/NZS 3760:2010 ensuring that you get Quality Service at a competitive price. Call Now Mobile 040 7605568 Visit us at http://www.testedandtrue.com.au or our Newsletter http://testedtruenewsletter.blogspot.com/ Peter Hill Manager , Tested & True ~ test & tag Adelaide April 2014

Buyers Guide to Surge Protected Power Boards

How do surge protected power boards work ?
At first glance a surge protected power board operates like any other Power Board. It shows its ability at that moment when too much voltage gets passed along the transmission line , the surge protected board lets only a ‘safe’ amount through to the connected equipment. The rest it channels into the electrical outlet’s ‘earth’ and safely dissipated into the ground.
When a surge occurs at a certain level above normal voltage, a component built into the surge protected power board becomes conductive and starts to carry the excess electric current back down through the ground wire, so the damaging high voltage doesn’t reach connected equipment. Once the surge ends, that protective component resumes its ‘dormant’ stage of being non-conductive. It’s a bit like an electrical version of a pressure valve.
Australian domestic wiring is designed for a standard voltage of 230–240 volts. If the voltage goes too far above that, it can damage electronic equipment, which usually has many sensitive components. If excess voltage lasts for a very brief time (1–2 nanoseconds) it’s called a spike. If it lasts longer it’s called a surge. Even though a spike or surge can be so brief their duration is measured in nanoseconds, they can still cause damage to sensitive components. It is vitally important to protect sensitive business equipment, Computers, printers, photocopiers etc these items of equipment are sensitive to Surges in voltage.
Surge_protection_board
So what sort of a Surge Protected Board should you Buy ? Here are the specifications you should consider…Energy absorption/dissipation – This rating, given in joules, tells you how much energy the surge protector can absorb before it fails. A higher number indicates greater protection. Look for a protector that is at least rated at 200 to 400 joules. For better protection, look for a rating of 600 joules or more.
Response time – Surge protectors don’t kick in immediately; there is a very slight delay as they respond to the power surge. A longer response time tells you that your computer (or other equipment) will be exposed to the surge for a greater amount of time. Look for a surge protector that responds in less than Ten nanoseconds.
It is best to look for a Surge protected board with an indicator light that tells you if the protection components are functioning. Eventually the protection component will burn out after continual power surges, but the board will still function as a power connection. Without an indicator light, you have no way of knowing if your protector is still functioning properly.
Other important features may include ?
Building wiring status indicator: Detects potentially dangerous wiring problems in the wall outlet.
Circuit breaker: Protects the surge board from overload by connected devices drawing too much current.
EMI noise filtration: This reduces or eliminates line noise (electrical interference).
Other connections: Surge protected sockets for coaxial cable, modem or Ethernet network, all of which can also conduct high voltage that can damage connected devices.
Outlet spacing: Allows more room for one or more devices that use a transformer block.
Sockets: Check the number of mains power sockets available, usually from four to eight.

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At Tested and True …we come to your work place at a time convenient to you. We can do an assessment of your Electrical Hazards it can be conducted at the same time as we test and tag your Electrical Equipment. We provide a Full Report with recommedations to clear up current Hazards and how to prevent future risks. Call and ask for a quote. 040 7605568 Tested & True ~ test & tag Adelaide uses the very latest in Portable Appliance Testing…The STC ProLogger 2 it can perform RCD testing, Earth Leakage Detection and Run Testing all in one neat piece of equipment. On top this all our Technicians are Trained to National Standard UEENEEP008 in test & tag operations by Intertag in Sydney NSW, all our Equipment is in good repair and in Calibration. Most of all we pride ourselves on our Knowledge of OH&S legislation and the current Australiand Standard AS/NZS 3760:2010 ensuring that you get Quality Service at a competitive price. Call Now Mobile 040 7605568

Visit us at http://www.testedandtrue.com.au or our Newsletter http://testedtruenewsletter.blogspot.com/

Peter Hill Manager Tested & True ~ test & tag Manager SA 0407605568

Take Care of your Workplace Appliances and Cords

PULL THE PLUG… NOT THE LEAD!

Pulling the plug out of the socket by the lead will eventually expose the single wires which weakens its insulation and therefore increases electrocution risk. The Image below shows what happens to plugs pulled out by the leads
Exposed wires from pulling on lead

KEEP POWER LEADS AWAY FROM HEAT AND WATER.

Heat or water can damage the insulation and create a shock hazard.

POWER LEADS UNDER CARPETS ARE A FIRE HAZARD.

Don’t run electric cords under rugs, through doorways or anywhere they will get excessive wear.

INSPECT POWER LEADS AND POWER BOARDS

Worn, they can cause fires, short circuits or shocks. Check electrical cords and plugs and discard them if they are worn or damaged.

ELIMINATE MULTIPLE CONNECTIONS ON ONE POWER POINT

Plugging a number of cords into one outlet is a fire hazard. It usually indicates that your home wiring is outdated for your needs and that you should have more outlets wired in.

DO NOT CASCADE FROM ONE POWER BOARD TO ANOTHER OR OVERLOAD POWER BOARDS

Generally use Power Boards for Low current devices not Heaters, Kettles, and rotating machinery. Avoid cascading or connecting power boards together in chain arrangement as this may overload a 10 amp power wall socket and cause a fire or compromise the the electrical safety of the items attached to the power boards. Here below is an image of a burnt out power board which ran a 2400 Watt heater plus other electrical items. Note the burnt out socket.
Burnt out Neutral connection _ Personal and Fire Hazard

DON’T USE EXTENSION CORDS AS PERMANENT WIRING.

An extension cord is a handy device to temporarily bring power to an area in your home that does not have an outlet. It was never designed to take the place of permanent wiring. Using extension cords as permanent wiring is an indication that your home wiring is not adequate and should be updated.

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Here at Tested & True ~ test & tag, we can come to your work place and do an assessment of your Electrcal Hazards it is usually offered as an extra service and conducted at the same time as we test and tag your Electrical Equipment. We provide a Full Report with recommedations to clear up current Hazards and how to prevent future risks. Call and ask for a quote. 040 7605568

Tested and True uses the very latest in Portable Appliance Testing…The STC ProLogger 2 it can perform RCD testing, Earth Leakage Detection and Run Testing all in one operation.On top this all our Technicians are Trained to National Standard UEENEEP008 by Intertag in Sydney NSW, all our Equipment is in good repair and in Calibration. Most of all we pride ourselves on our Knowledge of OH&S legislation and the current Australiand Standards ensuring that you get Quality Service at a competitive price.

Call Now Mobile 040 7605568

Visit us at

www.testedandtrue.com.au

or our Newsletter http://testedtruenewsletter.blogspot.com/

Peter Hill Manager , Tested & True ~ test & tag Adelaide October 2013