Issue:
Panelboard lug temperature rating
Product Line:
Panelboard
Environment:
NQ Panelboards
Resolution:
The NQ 100 amp MAIN LUG panel is the only panelboard that allows the termination of conductors rated at 60 degree C, it has a dual listing (60/75 deg C).
ALL other panels have 75 deg C rated terminations and require 75 deg C conductors. Conductors with higher temperature ratings may be terminated on lower temperature rated terminations provided the ampacity of the conductor is based on the lower rating from table 310-16 in the NEC. For example, a 3/0 copper conductor with a 90 deg C temperature rating is rated at 225 amps, but you have to apply it at the 75 deg C rating from the table which is derated to 200 amps.
Panelboard lug temperature rating
Product Line:
Panelboard
Environment:
NQ Panelboards
Resolution:
The NQ 100 amp MAIN LUG panel is the only panelboard that allows the termination of conductors rated at 60 degree C, it has a dual listing (60/75 deg C).
ALL other panels have 75 deg C rated terminations and require 75 deg C conductors. Conductors with higher temperature ratings may be terminated on lower temperature rated terminations provided the ampacity of the conductor is based on the lower rating from table 310-16 in the NEC. For example, a 3/0 copper conductor with a 90 deg C temperature rating is rated at 225 amps, but you have to apply it at the 75 deg C rating from the table which is derated to 200 amps.
Released for: Schneider Electric USA
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