I am awaiting engineering documentation on an area. It is a closed building where a wood chipper similar to the ones used by power line clearing folks, operates and the chips are stored for later bagging and distribution.
Initial thoughts seem to indicate it will likely be classified as a Class III Div 1 Location.
In reviewing the Code (503.125), I find a requirement that allows TEFC motors but there are also temperature limitations in 503.5.
I don't recall ever having to inspect a motor in a Class III area. Would such a motor need to be marked as suitable in an Class III area or is any TEFC motor acceptable ?
If classification marking is not required, how is 503.5 addressed ? I don;t recall if an off the shelf TEFC motor has a maximum surface temperature rating.
Initial thoughts seem to indicate it will likely be classified as a Class III Div 1 Location.
In reviewing the Code (503.125), I find a requirement that allows TEFC motors but there are also temperature limitations in 503.5.
I don't recall ever having to inspect a motor in a Class III area. Would such a motor need to be marked as suitable in an Class III area or is any TEFC motor acceptable ?
If classification marking is not required, how is 503.5 addressed ? I don;t recall if an off the shelf TEFC motor has a maximum surface temperature rating.