HAZARDOUS & NON HAZARDOUS LIGHTNING PROTECTION

 

WHAT IS THE DIFFERENCE? WHY DO WE SEPARATE HAZARDOUS & NON HAZARDOUS AREA APPLICATIONS

 

Most industrial applications and processes that require some form of earthing, bonding, surge protection or lightning protection can be identified as occurring within a Hazardous or Non Hazardous Classified Area. A Hazardous Area is simply an area that contains a flammable or combustable substance. Usually classifies as a Zone 0,1 or 2 or Zone 20, 21 or 22.  A Non Hazardous Area is identified as not having a flammable or combustable substance.

 

Hazardous Areas and the electrical equipment that can be used within them including  earthing, bonding, surge protection or lightning protection equipment, must meet appropriate Australian & New Zealand regulations and standards. The regulations and standards that apply to a Hazardous Area may not or do not apply to a Non Hazardous Area. In relation to  earthing and bonding, surge protection or lightning protection equipment, there are particular types of equipment that are designed specifically for Hazardous Areas. These types of equipment require IECex certification suitable for the type of Hazardous Area that they will be used in.

 

Non Hazardous Areas and the electrical equipment that can be used within them including earthing and bonding, surge protection or lightning protection equipment must also meet appropriate Australian & New Zealand regulations and standards. However in relation to earthing and bonding, surge protection or lightning protection equipment used in a Non Hazardous Area there is no requirement for IECex certification.

 

A good example of a process that is often misdiagnosed and

associated with a Non Hazardous Area is the process of milling.

In some cases the processes that occur in Sugar and or Flour

Mills occur within a Hazardous Area or Classified Zone 21 or 22. 

 

Flour and or Sugar dust in large enough quantities can be highly

combustible. As such any lightning protection equipment used

in this application must be suitable for a Hazardous Area or

Classified Zone 21 or 22. 

 

Less obvious processes such as those where combustable dusts

are used are often incorrectly specified as Non Hazardous Areas 

and as a result unsuitable earthing and bonding, surge protection

or lightning protection equipment is installed.

 

In practical terms earthing and bonding, surge protection or lightning protection equipment that can be used in Hazardous Areas is often quite specific to the application within a Hazardous Area. This is due in part to this type of equipment having to undergo significant laboratory testing and simulation from certified testing laboratories such as Sira, Baseefa to ensure that the equipment is suitable to be used in a Hazardous Area prior to receiving IECex certification. In some cases this testing can take 12 - 24 months to complete. 

 

If you require further information in relation to IECex certification please visit the IEC website www.iecex.com or contact us at lightning@lightningepc.com or +61 3 5977 5920.