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 |

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Fire Hazards heaters, clothes dryers & electric blankets

Each winter heaters, electric blankets and tumble dryers cause a large number of house fires in Australia. Have you checked and kept up your maintenance by simply following these valuable tips

Removing hazards and safe use of heaters

  • Never leave heaters unattended. If a fire starts it could spread through your home before you are able to respond.
  • Keep flammable materials at least a metre away from the heater. The majority of house fires are caused by people hanging clothes or towels to dry on or in front of the heater. Clothes, upholstery, curtains and other material that could catch fire should be kept more than a meter from any heater at all times.
  • Make sure portable heaters are secured upright and not left in locations where people or pets could knock them over.
  • Avoid using portable heaters on table tops unless they are secure and designed for that purpose. There is a risk of heat damage to the table top and if it falls off it could damage the heater and start a fire.

Electric heater safety tips

  • Don’t plug electric heaters into powerboards, double adaptors or extension cords with other appliances. Heaters consume large amounts of power and may overload the supply and cause a fire.
  • Before using an electric heater check the condition of the appliance and power cords for obvious damage. If there is damage contact an electrician or the service technician to fix it.

Gas heater safety and correct use

  • Never use gas heaters designed or marked for outdoor use inside. They are a fire risk and can also release toxic gases which can accumulate inside and potentially harm you. Using LPG cylinders indoors to provide fuel for unflued heaters or other gas appliances is dangerous and is not recommended.
  • Unflued heaters must not be used in bedrooms, bathrooms or small rooms that have no permanent ventilation. Toxic gases can build up inside and potentially harm you.
  • Never use your gas oven or stove as a room heater.
  • Always check your gas heater is working correctly. Signs of problems with gas heaters may include difficulty when lighting, yellow flames, unusual smells or noisy or inoperable fans.
  • Regularly service your gas heater according to the manufacturer’s instructions. Always use a licensed gas fitter for this task.

Clothes dryer safety

  • Ensure that the lint filter is cleaned regularly. Lint that has built up can catch fire.
  • Follow manufacturer’s instructions and only place suitable materials into the clothes dryer.

Electric blanket safety

Do you really need them they can be dangerous and not certainly not recommended for use with children (eg Bedwetting) If you really need to use one then every year take it out and give it a thorough check.

  • Electric blankets should be rolled when stored away. Folding an electric blanket can damage element wires within the blanket
  • When using a blanket for the first time after storage, lay it flat on the bed and check for hot spots as it heats up. Only add sheets once you are sure the blanket will operate safely at a maximum temperature.
  • Electric blankets that are not properly maintained can cause fires.
  • Avoid using double adaptors or power boards wherever possible.
  • Older electric blankets might be damaged and may not have the safety features of modern blankets, so consider replacing them.

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Tested & True ~ test & tag  Lonsdale We know how to all types of test sensitive electrical equipment like that of a Heaters and Tumble Dryers…We specifically use 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 up to date. 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.

Article By Peter Hill… Tested & True ~ test & tag, Lonsdale, South Australia, Contact 0407605568 February 2016 www.testedandtrue.com.au

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 15 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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Tested & True ~ test & tag  Lonsdale We know how to test sensitive electrical equipment like that of a Surge Power Board and other Surge protected equipment…We specifically use 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 up to date. 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.

Article By Peter Hill… Tested & True ~ test & tag, Lonsdale, South Australia, Contact 0407605568 January 2016 www.testedandtrue.com.au

 

Electrical fires & Fire Extinguishers

Electrical fires and Fire Extinguishers

But First a bit about Portable Fire Extinguishers…Basically Fire extinguishers are devices that release chemicals and/or water to put out a fire. They keep small fires from spreading, assist in fighting fires but are only first to the incident appliances until the fire department arrives. Fire extinguishers and on site Fire hoses are designed to provide the user with an appliance to attend a small fire during its initial stage. When deciding to attack a fire, always designate another person to raise the alarm and obtain a back-up fire extinguisher. Portable fire extinguishers should be provided in all buildings.

Types of fire extinguishers and their application

There are basically 5  types of portable fire extinguishers used here  in Australia. They are Water, Foam, Dry Powder, Wet Chemical and Carbon Dioxide. Each type of extinguisher may be rated for one or more classes of fire. In some cases, particular extinguishers are not only considered ineffective against certain classes of fire, they can be dangerous in those circumstances. The Classes of fire are:

CLASS A Paper, Wood, Cardboard

CLASS B Solvents, Paint, Petroleum, Ethanol/methanol

CLASS E Electrical fires(this is the one we are going to concentrate on in this article)

CLASS F Cooking oils and fats

OPERATION

To use the extinguisher, you pull out the safety pin (this metal safety pin prevents the operating lever from closing accidentally) and depress the operating lever. The lever pushes on an actuating rod, which presses the spring-mounted valve down to open up the passage to the nozzle. The bottom of the actuating rod has a sharp point, which pierces the gas cylinder release valve. The proper way to use the extinguisher is to aim it directly at the fuel, rather than the flames themselves, and move the stream with a sweeping motion.

Using an extiguisher

Of the 5 extinguishers types 2 are suitable for Electrical fires they Dry Powder and Carbon Dioxide

Dry Powder

ABE powder consists of mono ammonium phosphate and/or ammonium phosphate. It is effective on Class A: B & E Fires .As well as suppressing the flame in the air, it also melts at a low temperature to form a layer of slag which excludes oxygen from the fuel. For this reason it is effective against class A fires unlike a Rating B:E only extinguisher. ABE powder is the best agent for fires involving multiple classes.

Carbon dioxide

Carbon dioxide is especially effective on electrical fires, Class E Fires, as being a gas; it does not leave any residues which might further harm the damaged equipment. Carbon dioxide (CO2) also works on Classes B and C Fires by displacing the less dense oxygen. This can be problematic in enclosed occupied spaces as we need oxygen too! Although carbon dioxide is exhaled in our own breath, in the high concentrations required to extinguish deep seated fires it is one of the most toxic extinguishing agents used. (Carbon dioxide can also be used on Class A Fires when it is important to avoid water damage, but in this application the gas concentration must usually be maintained longer than is possible with a hand-held extinguisher.)

So as you can see Both of these extinguisher are suitable for Electrical fires but it depends on whether your fighting a fire in a confined space which would make using the Carbon Dioxide Extinguisher out of the question!

Tested & True ~ test & tag  Lonsdale also does fire Extinguisher and smoke Alarm testing to National Standards.. Also we Test and Tag electrical items and we use 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.

Article By Peter Hill… Tested & True ~ test & tag, Lonsdale, South Australia, Contact 0407605568 www.testedandtrue.com.au

 

Workplace Power Tool Safety Tips

Workplace Power Tool Safety Tips

Introduction:

Power Tools are time saving convenient devices that assist us in building and maintaining our World. However it also contributes to large amount of injuries recorded in Australia every year. Many of these injuries are often easily avoidable and attributed to carelessness, a lack of proper tool maintenance or simply not reading the operating instructions.

Power Tool safety 101

  •          Wear safety gear

Always wear the appropriate safety gear, particularly safety eye wear. Flying shards and debris create unpredictable trajectories and a sudden occurrence can not only cause damage to your eyes but force you to loose control of the powered tool you’re operating.

In addition to eye wear, workplace noise is also often overlooked. However the cumulative time of exposure to above normal decibel levels in the workplace can do irreversible damage to your hearing.

Other safety gear such as gloves and appropriate clothing/ safety footwear are just as important, and should be part of formal personnel safety plans.

  •          Read the operating instructions

Being unfamiliar with the safe operation of the power is often the cause of power tool injuries. Before using anew power tool ensure you read the operation, safety and maintenance instructions of the particular tool. The key here is to familiarize both yourself and your team with new equipment when it is introduced to the fleet or job. In particular, built in safety devices and kill switches should be highlighted. Remember to also use a RCD power breaker/power board when working with high powered tools.

  •          Electrical Safety and Power Tool operation

When workers use portable power tools and electrical leads that are electrically faulty or damaged they may suffer electrical shock, which could result in death, heart problems, internal organ damage or burns. To reduce risk of injury or death, electrical leads and power tools should be visually inspected prior to use, and avoided if equipment appears to have been modified or damaged. Tools should only be plugged into socket outlets that are protected by a residual current device (RCD) or a portable RCD is used.

Electrical hazard found on Site

Cut Lead Exposed wires found on Circular Saw at Warehouse

Workers should ensure power circuits are protected by the appropriate rated fuse or circuit breaker to prevent overloading and potential overheating. Electrical leads should be arranged so they do not run across the floor or ground, through doorways and over sharp edges. Where the lead arrangement is dangerous, lead stands or insulated cable hangers should be used to keep leads off the ground. Leads and tools should never be used in damp conditions unless they are specially designed for use in those conditions. Ensure your Tools are Tested and Tagged regularly to pick up electrical faults and potential hazards.

  •          Report all accidents

It’s important to report all accidents and injuries in the workplace. This not only creates a culture of continuous learning, but also helps to future proof against lengthy compensation claims.

In South Australia, It is a legal obligation to notify Safe-Work SA of any work-related injury that requires treatment as an inpatient in a hospital immediately after a workplace  injury (disregarding any time taken for emergency treatment or to get the person to hospital).If you are reporting work-related injuries or incidents to Safe-Work SA the 24 hour Emergency, Dial 1800 777 209.

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Tested & True ~ test & tag comes 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 Standards 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 August 2014

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

Why does my Safety Switch keep tripping?

Electrical Safety Switch Tripping possibilities

Electrical Safety Switches  are RCDs ( Residual Current Devices)  that remove the supply to an electrical circuit when the circuit under protection has detected a leakage to earth. The RCD/Safety Switch responds in mere mili -seconds; avoiding an unsafe condition and thereby potentially preventing electrocution or Fire hazard.

Possible Causes Of Safety Switch/RCD Tripping

Faulty appliance – unplug all electrical appliances, does the RCD reset OK? If the RCD resets OK plug the appliances back in one at a time. Reset the RCD as you plug each appliance back in to find the faulty appliance.

Items with motors or pumps starting – many items with motors or pumps, for instance showers and pond pumps, cause momentary electrical spikes that are big enough to trip RCDs. Seek advice from a qualified electrician.

Older washing machines – aging washing machine heating elements can cause momentary electrical spikes that are big enough to trip RCDs.

Certain wash cycle phases – some cycles of the washing machine, for instance the spin cycle, can cause momentary electrical spikes that are big enough to trip RCDs.

Certain dishwasher cycles – some parts of the dishwasher cycle draw a lot of current, a faulty component, for instance the motor, can trip an RCD.

Overloading a washing machine – too many items in a washing machine can cause certain wash cycles, for instance the spin cycle, to trip an RCD.

Fridges and freezers cooling – the fridge or freezer cooling motor starting.

Turning an heating element on after a long time of being off – moisture in heating elements can trip an RCD, for instance in a sun bed or electric fire. Try resetting the RCD a few times so that the heating element can cause the moisture to evaporate.

Moisture in outside electrical distribution boxes – remove the supply and dry the distribution box. Check the weather seals have not perished.

Moisture in outside electrical sockets – remove the supply and dry the electrical socket. Check the weather seals have not perished.

De-frost timer on a fridge or freezer – a faulty defrost element on a fridge or freezer can cause ‘nuisance’ RCD tripping.

Water heating elements – faulty water heating elements can cause nuisance RCD trips when thethermostat tells them to heat the water.

Moisture in wiring – moisture in the electrical wiring is a common cause of RCD trips. Have you just emptied a bath? Taken a shower? Is it raining – rain can get into the electrical wiring under the floors or in the loft.

As you may have found this list contains certain  conditions that may give clue to an RCD tripping. In most cases this concerns appliances or situations that involve at least one or a combination of  three conditions 1) Moisture leaking electricity to earth in the appliance or premises wiring. 2) A heating element that is either faulty or drawing sudden electrical surges. 3) An appliance with an electric motor that is either faulty or drawing sudden electrical surges.

If you have trouble sourcing constant or intermittent RCD/Safety Switch Tripping then Contact us and we can send a Qualified Electrician around to check it they can source and fix it on the spot.

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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 January 2014