Noel Williams is a licensed master electrician in Utah, Colorado, and Wyoming. He is International Code Council (ICC) and International Association of Electrical Inspectors (IAEI) certified as an electrical inspector and has supervised and managed electrical construction projects for over 20 years. For over 10 years he was chairman of the Electricians’ Licensing Board for the state of Utah and is a former chairman of the National Electrical Code® (NEC®) Advisory Committee for the Utah Uniform Building Code Commission. Mr. Williams is a senior associate member of IAEI and has served as an officer of the Utah chapter of IAEI. Currently an electrical codes specialist, he also taught electrical apprentices at Salt Lake Community College for 6 years and has developed and taught electrical courses for electricians and inspectors for over 30 years. In addition to authoring and coauthoring three other NFPA publications—NEC Q & A, Limited Energy Systems, and 1999 NEC Changes—Mr. Williams was the lead technical developer of NFPA’s NEC seminars and has served as a seminar instructor for over 20 years. Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Jeffrey S. Sargent is a Senior Electrical Specialist with the NFPA Electrical Engineering Department. He has been affiliated with the electrical industry for over 25 years as an electrician, inspector, instructor, consultant, author, and electrical specialist. He is managing editor of the 2008 NEC Handbook and serves as the executive secretary to the NFPA Electrical Section as well as a staff liaison to several NFPA technical committees. He is a technical contributor to necplus™, NFPA’s online source for information on the NEC and a coauthor of NEC Q & A. As a member of the IAEI, Mr. Sargent maintains a professional certification through their Certified Electrical Inspector program and is a licensed master electrician.