Module 3 in the series on AC Theory Help. Created by and for the members of IBEW Local Union No. 26 in Washington DC, and the members of the Washington DC Chapter of the National Electrical Contractors Association (NECA). No unauthorized duplication or use is permitted without the written permission of the Joint Apprenticeship Training Committee IBEW L.U. 26. Contact Sean Myers at email@example.com. If you are interested in a career in electrical construction check out your local non-profit IBEW JATC or web search “Union Apprenticeships”.