The required working space for access to live parts operating at 300V-to-ground, where there are exposed live parts on both sides of the workspace is _____.
a) 3 ft
b) 3.5 ft
c) 4 ft
d) 4.5 ft
See answer and applicable Code reference
The correct answer is: c) 4 ft
Hopefully, most everyone is familiar with the access and working space requirements outlined in Sec. 110.26 of the NEC. As noted in 110.26(A)(1), "The depth of the working s