Yes, this can be achieved on the secondary side of the transformer. The HOT (24VAC) is usually indicated by red wiring, and the Ground (Common) is usually indicated by green wiring. We do not recommend, however, that the pull from the transformer exceed 10VA. This can cause premature failure of the transformer. It is best to inform Thermolec to size the transformer properly if it is known fact the transformer will used to power other sources.