Referencing Table 310.19 it states the following:
Table 310.19 Allowable Ampacities of Single-Insulated Conductors, Rated 0 Through 2000 Volts, 150 degrees Through 250 degrees (302 degrees F Through 482 degrees F), in Free Air, Based on Ambient Air Temperature of 40 degrees C (140 degrees F)
Does anyone know of a reference that specifically states the definition of "Free Air"?
I appreciate anyones help.
Brian
