Category: Studies-Arc Fault-Working Distance

Answer: From within the Arc Flash Evaluation spreadsheet, select the Working Distance you wish to change and type in the new value. The software will automatically recalculate the Incident Energy.

If you wish to change an entire group of values, select them with the mouse and right-mouse click. Select Global Change and enter the new Working Distance and click on the OK button.

Notes: Working distances are hard coded in the software based on the bus voltage and equipment type.  See table below.

Working Distance	Equipment Type	Voltage
24 inches (610mm)	Switchgear	less than or equal to 1kV
18 inches (455mm)	Panel	less than or equal to 1kV
36 inches (910mm)	Switchgear	> 1 & < 35
72 inches (1829mm)	Switchgear	> 35
18 inches (455mm)	all others	N/A