ARC FLASH PROTECTION

 

The severity and causes of electrical hazards are varied, but the best protection is to de-energize equipment before working on it.

No one has ever been killed or injured from an Arc Flash while working on de-energized equipment. If equipment cannot be de-energized, electrical workers must be “qualified”, trained, wear appropriate personal protective equipment (PPE), and follow all applicable NFPA standards. It​ is important to remember that proper selection and application of overcurrent protective devices (OCPD) will also substantially reduce the hazards.


 

NFPA 70E require an Electrical Hazard Analysis prior to beginning work on or near electrical conductors that are or may become energized.

The analysis must include all electrical hazards:

  1. Shock,
  2. Arc Flash,
  3. Arc Blast, and
  4. Burns.

Arc Flash CAT 2

 

It is this Company’s objective to comply with world leading international standards to protect our employees against the potential of Arc Flash. We have gone to great expense to bring you a world class PPE range of daily wear to make you, our greatest asset, to work in a safer environment.

 

To ensure maximum effectiveness when wearing CAT 2, make sure that the PPE is on good working order, i.e., no tears, rips or damage to any seam or stitching before use.

Make sure sleeves are rolled down and shirt tails are tucked into the pants and all buttons are fastened.

Do not make any modifications to the PPE and only wash with soap i.e. no softeners or bleach to be used.

 

 

When entering a substation, switching yard or working near an MCC, the following shall be worn.

 

 

Class “E” hard hat, approved safety glasses and approved arc rated gloves

 

Make sure to only purchase approved PPE as per specifications.

 

 

 

Arc Flash CAT 4

 

It is this Company’s policy that all employees exposed to the potential Arc Flash hazards where the risk is high and the incident energy is greater than 8,7 Cal/cm2 or where the incident energy is not known, shall wear CAT 4.

 

 

When wearing CAT 4 make sure that the PPE is in good working order, i.e., no tears, rips or damage to any seam or stitching before use. Make sure all parts of the body that may be exposed to the Arc Flash need to be covered.

Do not make any modifications to the PPE and only wash them with soap, i.e., no softeners or bleach.

 

The high risk tasks that require (Cat 4) are

 

  1. Switching
  2. Racking
  3. Commissioning
  4. Testing
  5. Phasing
  6. No Lock Out Tag Out