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If I were the installer, I'd mark it for my own benefit because you'd probable not remember Line/Load when you went back to it in the future.

Great point, honestly the 1600 I described above is not readily apparent either by looking at the conduits or by the construction of the unit.

I have to order phenolic labels for the job, may be I will have a couple of line and load ones made to mark it.

Bob

Bob Badger
Construction & Maintenance Electrician
Massachusetts