Arc Flash Studies

An arc flash is a type of electrical explosion which results in a rapid and dangerous release of energy.

The arc flash travels through air via positive & negative ions and can be a very violent destructive force, causing great harm to those in proximity. Arc flashes are based upon incident energy, a measure of thermal energy at a working distance from an arc fault.  They are measured/rated in Cal/cm2.

Through an Arc Flash Study, OTS will determine Electrical Shock Hazard boundaries, and train your staff as to proper access and protection within these boundaries.  We can help you train your staff on Arc Flash dangers.


Each boundary is decided using NFPA 70 E Table 130.2 C.

OTS will ensure that your staff is properly trained and  adequately qualified to enter the various levels of boundary. We will advise you as to the proper level of PPE and glove classification based on risk categories HRC 1-4.  

Shock Hazard Boundary Definitions in NFPA 70E

* Limited Approach Boundary: A risk of shock exists within this boundary. Unqualified persons may enter this area if they are under the supervision of a qualified worker and using proper PPE.

* Restricted Approach Boundary: Qualified personnel only. Requirements are the same as if working on or near energized circuits. Insulated gloves, tools, and equipment are required within this boundary.