According to the NFPA 70E, Arc Flash is a “dangerous condition associated with the release of energy caused by an electric arc.” It is measured in terms of arc flash incident energy E (AFIE), which is used to determine the level of Personal Protective Equipment (PPE).
An arc flash is the light and heat produced from an electric arc supplied with sufficient electrical energy to cause substantial damage, harm, fire, or injury. This can occur near high power electrical equipment such as transformers, service entrance switch gear or generators.
The first step to protection conduct an Arc Flash Hazard Analysis which defines the procedures and limits the damage of electrical arcs on personnel and, by measuring the released energy, defines the risk and determines the relevant level of the PPE required.
|HRC* 0 – 0 cal/cm2 ; 0 J/cm2:||Non-melting, flammable materials (i.e untreated cotton, rayon, wool, silk or blends of these materials) with a minimum fabric weight of 150g/m2|
|HRC* 1 – 4 cal/cm2 ; 16,74 J/cm2:||Arc Rated Flame Retardant shirt, Flame Retardant trousers or Flame Retardant coverall|
|HRC* 2 – 8 cal/cm2 ; 33,47 J/cm2:||Arc Rated Flame Retardant shirt, Flame Retardant trousers or Flame Retardant coverall|
|HRC* 3 – 25 cal/cm2 ; 104,6 J/cm2:||Arc Rated Flame Retardant shirt and FR trousers or FR coverall, and arc flash suit selected so that the system arc rating complies with the required minimum|
|HRC* 4 – 40 cal/cm2 ; 167,36 J/cm2:||Arc Rated Flame Retardant shirt and FR trousers or FR coverall, and arc flash suit selected so that the system arc rating complies with the required mini|
*HRC: Harzard/Risk Category
Selecting the correct level of Arc Protection Equipment (APE) is made easy from this table however there are a few questions to ask your APE supplier:
- Is the garment compliant with SANS 724:2010, NFPA 70E:2009 and SANS 984/IEEE Std 1584?
- Can they send you the relevant certifications?
- Does the garment meet your required HRC level?
- Has the garment been tested? (not the fabric – very important)
- If so, can they send you the test reports that include photos?
It’s important to note that where more than 40cal/cm2 APE is required it is not recommended unless all other means of reducing the risk of exposure has been investigated.
The Arc PPE you use really is your last line of defence, and following the above steps ensures that you are doing the best you possibly can to minimise injuries as a result of an arc flash incident.
Information supplied by: Dromex Personal Protective Equipment.
The annual World Day for Safety and Health at Work on 28 April 2017 promotes the prevention of occupational accidents and diseases globally. It is an awareness-raising campaign intended to focus international attention on the magnitude of the problem and on how promoting and creating a safety and health culture can help reduce the number of work-related deaths and injuries.
The ILO celebrates the World Day for Safety and Health at Work on the 28 April to promote the prevention of occupational accidents and diseases globally. It is an awareness-raising campaign intended to focus international attention on emerging trends in the field of occupational safety and health and on the magnitude of work-related injuries, diseases and fatalities worldwide.
With the celebration of the World Day for Safety and Health at Work, the ILO promotes the creation of a global preventative safety and health culture involving ILO constituents and all key stakeholders in this field. In many parts of the world, national authorities, trade unions, employers’ organizations and safety and health practitioners organize activities to celebrate this date. We invite you to join us in celebrating this significant day and share with us the activities you organize.
The 28 April is also the International Commemoration Day for Dead and Injured Workers organized worldwide by the trade union movement since 1996. Its purpose is to honour the memory of victims of occupational accidents and diseases by organizing worldwide mobilizations and awareness campaigns on this date.
In 2003, the ILO became involved in the April 28 campaign upon request from the trade union movement. While we honour injured and fallen workers, we appreciate and celebrate that these injuries and fatalities can be prevented and reduced, recognizing it as both a day for commemoration and celebration. Since 2003, the ILO observes the World Day on Safety and Health at Work on April 28 capitalizing on its traditional strengths of tripartism and social dialogue.
28 April is seen as a day to raise international awareness on occupational safety and health among trade unions, employers’ organizations and government representatives alike. The ILO acknowledges the shared responsibility of key stakeholders and encourages them to promote a preventive safety and health culture to fulfill their obligations and responsibilities for preventing deaths, injuries and diseases in the workplace, allowing workers to return safely to their homes at the end of the working day.
For more information please visit /safeday
Saiosh call on all Members to observe a minute of silence at 12:00 noon on 28 April 2017 in remembrance of persons that lost their lives in workplace accidents.