Separating interior equipment loads

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I would create a separate Electric Equipment Definition and a schedule for each one from the OpenStudio Loads tab. If you want to sub-meter these use the End-Use Subcategory field, which is not exposed in the OpenStudio app but can be set using the API. These will show up in the End Uses By Subcategory table in the EnergyPlus HTML results file. Here's an example using elevators.

# get model objects
objs = model.getElectricEquipments

# do stuff
objs.each do |obj|

    eed = obj.electricEquipmentDefinition

    if eed.name.to_s.include?('Elevators')
        obj.setEndUseSubcategory('Elevators')
    end

end