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  1. 2008 NEC Questions and Answers April Part 1     [ April 10th 2008 ]
  2. 2008 NEC Questions and Answers April Part 2     [ April 30th 2008 ]
  3. 2008 NEC Questions and Answers August     [ August 7th 2008 ]
  4. 2008 NEC Questions and Answers January - Part 2     [ January 15th 2008 ]
  5. 2008 NEC Questions and Answers January Part 1 of 2     [ January 4th 2008 ]
  6. 2008 NEC Questions and Answers June Part 1     [ June 12th 2008 ]
  7. 2008 NEC Questions and Answers March - Part 1     [ March 12th 2008 ]
  8. 2008 NEC Questions and Answers May Part 1     [ May 16th 2008 ]
  9. 2008 NEC Questions and Answers September     [ September 9th 2008 ]
  10. 2011 Changes to the NEC - 110.16     [ April 12th 2012 ]
  11. 2011 Changes to the NEC - 110.24     [ April 25th 2012 ]
  12. 2011 Changes to the NEC - 110.26     [ May 14th 2012 ]
  13. 2011 Changes to the NEC - 200.6     [ May 29th 2012 ]
  14. 2011 Changes to the NEC - 210.12     [ July 23rd 2012 ]
  15. 2011 Changes to the NEC - 210.4     [ June 6th 2012 ]
  16. 2011 Changes to the NEC - 210.5     [ June 25th 2012 ]
  17. 2011 Changes to the NEC - 210.8     [ July 11th 2012 ]
  18. 2011 Changes to the NEC - 240.21     [ August 24th 2012 ]
  19. 2011 Changes to the NEC - 240.4     [ August 10th 2012 ]
  20. 2011 Changes to the NEC - 250.102     [ February 22nd 2013 ]
  21. 2011 Changes to the NEC - 250.104     [ August 13th 2013 ]
  22. 2011 Changes to the NEC - 250.118     [ September 12th 2013 ]
  23. 2011 Changes to the NEC - 250.30     [ October 22nd 2012 ]
  24. 2011 Changes to the NEC - 250.32     [ November 7th 2012 ]
  25. 2011 Changes to the NEC - 250.52     [ November 27th 2012 ]
  26. 2011 Changes to the NEC - 250.64     [ December 14th 2012 ]
  27. 2011 Changes to the NEC - 250.92     [ January 9th 2013 ]
  28. 2011 Changes to the NEC - 250.94     [ January 25th 2013 ]
  29. 2011 Changes to the NEC - 300.22     [ November 26th 2013 ]
  30. 2011 Changes to the NEC - 300.3     [ October 24th 2013 ]
  31. 2011 Changes to the NEC – 110.14     [ March 22nd 2012 ]
  32. 2011 Changes to the NEC – 110.3     [ March 12th 2012 ]
  33. 2011 Changes to the NEC – 250.24     [ October 8th 2012 ]
  34. 2011 Changes to the NEC – 250.4     [ September 13th 2012 ]
  35. 2011 Changes to the NEC – 250.6     [ September 24th 2012 ]
  36. 2011 Changes to the NEC – 90.2     [ February 17th 2012 ]
  37. 2011 NEC Accepted Revisions     [ July 13th 2009 ]
  38. 2011 NEC Questions & Answers - December 2011     [ December 21st 2011 ]
  39. 2011 NEC Questions & Answers - January 2012     [ January 17th 2012 ]
  40. 2011 NEC Questions & Answers - June 2011     [ June 16th 2011 ]
  41. 2011 NEC Questions & Answers - May 2011     [ May 24th 2011 ]
  42. 2011 NEC Questions & Answers - October 2011 Part 1 of 2     [ October 18th 2011 ]
  43. 2011 NEC Questions & Answers - October 2011 Part 2 of 2     [ November 1st 2011 ]
  44. 2011 NEC Questions & Answers - September 2011 Part 2 of 2     [ September 20th 2011 ]
  45. 2011 NEC Questions & Answers Part 1 - February 2012     [ February 10th 2012 ]
  46. 2011 NEC Questions & Answers Part 2 - February 2012     [ February 28th 2012 ]
  47. 2011 NEC Questions and Answers - April 2012     [ April 20th 2012 ]
  48. 2011 NEC Questions and Answers - August 2012     [ August 28th 2012 ]
  49. 2011 NEC Questions and Answers - July 2012     [ July 17th 2012 ]
  50. 2011 NEC Questions and Answers - June 2012     [ June 19th 2012 ]
  51. 2011 NEC Questions and Answers - May 2013     [ May 21st 2013 ]
  52. 2011 NEC Questions and Answers - October 2012     [ October 12th 2012 ]
  53. 2011 NEC® - Changes of Interest to the Data/Comm Industry     [ March 16th 2011 ]
  54. 250.6 Objectionable Current     [ October 10th 2007 ]
  55. AFCIs on the Brink     [ February 6th 2007 ]
  56. Air Conditioning and Refrigeration Equipment     [ February 17th 2009 ]
  57. Air Conditioning and Refrigeration Equipment - Article 440, based on the 2011 NEC®     [ April 15th 2013 ]
  58. Alternative Energy Systems, Part 1     [ June 29th 2012 ]
  59. Alternative Energy Systems, Part 2 - Based on the 2011 NEC     [ August 13th 2012 ]
  60. April NEC Questions and Answers     [ April 18th 2006 ]
  61. Article 100 General: Separately Derived Systems     [ October 13th 2006 ]
  62. Article 100 General: Solidly Grounded     [ October 6th 2006 ]
  63. Article 100 General: System Bonding Jumper     [ September 29th 2006 ]
  64. Article 110 - Requirements for Electrical Installations - Based on the 2014 NEC     [ January 14th 2014 ]
  65. Article 110: Requirements for Electrical Installations – Based on the 2011 NEC     [ February 28th 2011 ]
  66. Article 210 - Branch Circuits, based on the 2014 NEC®     [ February 18th 2014 ]
  67. Article 210 Branch Circuits 210.4     [ October 20th 2006 ]
  68. Article 210 Branch Circuits 210.5     [ October 27th 2006 ]
  69. Article 210 Branch Circuits 210.8     [ November 3rd 2006 ]
  70. Article 210 Branch Circuits 210.8     [ November 10th 2006 ]
  71. Article 210: Branch Circuits, Part One: Conductor sizing and Overcurrent Protection     [ January 31st 2007 ]
  72. Article 210: Branch Circuits, Part Two: GFCIs and AFCIs     [ February 20th 2007 ]
  73. Article 215: Feeders     [ May 2nd 2007 ]
  74. Article 225: Outside Branch Circuits     [ May 9th 2007 ]
  75. Article 230 - Services, based on the 2014 NEC     [ March 18th 2014 ]
  76. Article 230: Services, Part 1: Equipment Requirements     [ April 17th 2007 ]
  77. Article 230: Services, Part 2: Conductor Requirements     [ May 16th 2007 ]
  78. Article 240 Overcurrent Protection     [ December 9th 2006 ]
  79. Article 240: Overcurrent Protection     [ May 22nd 2007 ]
  80. Article 250 - Grounding and Bonding Part 1, Based on the 2014 NEC     [ April 15th 2014 ]
  81. Article 250 Grounding and Bonding 250.2     [ December 15th 2006 ]
  82. Article 250 Grounding and Bonding 250.34     [ January 26th 2007 ]
  83. Article 250 Grounding and Bonding 250.4     [ December 22nd 2006 ]
  84. Article 250 Grounding and Bonding 250.52     [ February 9th 2007 ]
  85. Article 250 Grounding and Bonding 250.64     [ February 16th 2007 ]
  86. Article 250 Grounding and Bonding 250.8     [ January 12th 2007 ]
  87. Article 310 Conductors for General Wiring     [ February 23rd 2007 ]
  88. Article 314 Outlet Device, Pull and Junction Boxes, Conduit Bodies, and Handhole Enclosures     [ March 2nd 2007 ]
  89. Article 320 Armored Cable: Type AC     [ March 9th 2007 ]
  90. Article 330 Metal-Clad Cable: Type MC - 330.108     [ March 30th 2007 ]
  91. Article 330 Metal-Clad Cable: Type MC - 330.30     [ March 16th 2007 ]
  92. Article 348 Flexible Metal Conduit: Type FMC - 348.30     [ April 13th 2007 ]
  93. Article 400 Flexible Cords - 400.5     [ April 20th 2007 ]
  94. Article 406 Receptacles, Cord Connectors, and Attachment Plugs - 406.4     [ April 27th 2007 ]
  95. Article 406 Receptacles, Cord Connectors, and Attachment Plugs - 406.8 Cont.     [ May 18th 2007 ]
  96. Article 408 Switchboards and Panelboards - 408.4     [ May 25th 2007 ]
  97. Article 408 Switchboards and Panelboards - 408.7     [ June 1st 2007 ]
  98. Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps - 410.110     [ July 27th 2007 ]
  99. Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps - 410.73     [ June 29th 2007 ]
  100. Article 422 Appliances - 422.16 Flexible Cords     [ August 3rd 2007 ]
  101. Article 424: Fixed Electric Space-heating     [ January 18th 2008 ]
  102. Article 450: Transformers and Transformer Vaults     [ February 1st 2008 ]
  103. Article 500: Hazardous (classified) Locations     [ October 27th 2005 ]
  104. Article 501 Class I Locations - 501.15     [ August 17th 2007 ]
  105. Article 501: Class I Locations     [ November 10th 2005 ]
  106. Article 513 Aircraft Hangars - 513.12     [ August 24th 2007 ]
  107. Article 525: Carnivals, Circuses, Fairs, and Similar Events     [ November 29th 2005 ]
  108. Article 547 Agricultural Buildings - 547.10     [ September 14th 2007 ]
  109. Article 547 Agricultural Buildings - 547.5     [ September 7th 2007 ]
  110. Article 555 Marinas and Boatyards - 555.22     [ September 21st 2007 ]
  111. Article 555: Marinas and Boatyards     [ January 27th 2006 ]
  112. Article 590 Temporary Installations - 590.4     [ September 28th 2007 ]
  113. Article 600: Electric Signs and Outline Lighting     [ February 18th 2008 ]
  114. Article 645: Information Technology Equipment     [ February 7th 2006 ]
  115. Article 645: Information Technology Equipment     [ April 17th 2012 ]
  116. Article 680 Pools and Similar Installations - 2008 NEC     [ November 24th 2009 ]
  117. Article 680 Pools and Similar Installations - Part 1 of 2     [ October 12th 2009 ]
  118. Article 680 Swimming Pools, Spas, Hot Tubs, Fountains, and Similar Installations     [ October 5th 2007 ]
  119. Article 680 Swimmng Pools, Spas, Hot Tubs, Fountains, and Similar Installations - 680.26     [ October 19th 2007 ]
  120. Article 680: Swimming Pools and Spas     [ May 25th 2012 ]
  121. Article 695 Fire Pumps - 695.6     [ November 2nd 2007 ]
  122. Article 695: Fire Pumps     [ February 14th 2006 ]
  123. Article 700: Emergency Systems     [ April 20th 2006 ]
  124. Article 725 Class 1, 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits - 725.3     [ November 16th 2007 ]
  125. Article 725 Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits - 725.61     [ November 30th 2007 ]
  126. Article 725: Class 1 Remote-Control, Signaling, and Power-Limited Circuits     [ May 8th 2006 ]
  127. Article 725: Class 2 and 3 Remote-Control, Signaling, and Power-Limited Circuits (Part 2 of 2)     [ May 30th 2006 ]
  128. Article 760 Fire Alarm Systems     [ January 19th 2010 ]
  129. Article 760 Fire Alarm Systems - 760.21     [ December 14th 2007 ]
  130. Article 760: Fire Alarm Systems     [ July 24th 2006 ]
  131. Article 770: Optical Fiber Cables     [ July 26th 2006 ]
  132. Article 800: Communications Circuits     [ November 6th 2006 ]
  133. Article 810 - Radio and Television Equipment - Free Booklet     [ July 22nd 2011 ]
  134. Article 810 Radio and Television Equipment     [ December 4th 2006 ]
  135. Article 820: Community Antenna Television (CATV) and Radio Distribution Systems     [ January 5th 2007 ]
  136. Article 90 Introduction     [ September 22nd 2006 ]
  137. Articles 514 through 525     [ February 21st 2012 ]
  138. Articles 547 through 590     [ March 27th 2012 ]
  139. Articles 701 and 702: Legally Required and Optional Standby Systems     [ May 4th 2006 ]
  140. Attend an EC&M 2008 NEC Code Change Conference at a reduced registration fee!     [ October 8th 2007 ]
  141. Backup Power Systems - 2008 Edition Part 1 of 4     [ May 18th 2009 ]
  142. Backup Power Systems - 2008 Edition Part 2 of 4     [ June 24th 2009 ]
  143. Backup Power Systems - 2008 Edition Part 3 of 4     [ July 22nd 2009 ]
  144. Backup Power Systems - 2008 Edition Part 4 of 4     [ August 25th 2009 ]
  145. Box Fill Calculations     [ July 24th 2008 ]
  146. Boxes, conduit bodies, and handhole enclosures - Based on the 2011 NEC     [ July 19th 2011 ]
  147. Boy's Electrocution Ruled Accidental     [ January 12th 2009 ]
  148. Branch Circuits - Part 1     [ October 26th 2010 ]
  149. Branch Circuits - Part 2 of 2     [ November 29th 2010 ]
  150. Cables and the Code – Based on the 2011 NEC     [ August 9th 2011 ]
  151. Can You Spot the 2011 Code Violations (with answers)?     [ May 12th 2011 ]
  152. CATV and Radio Distribution Systems - Article 820, based on the 2011 NEC     [ June 18th 2013 ]
  153. Class I Hazardous Locations – Based on the 2011 NEC     [ January 11th 2012 ]
  154. Code Changes Preview - Free Online Seminar Friday     [ October 4th 2007 ]
  155. Commercial Garages     [ March 11th 2010 ]
  156. Commercial Load Calculations - Part 1     [ August 11th 2009 ]
  157. Commercial Load Calculations - Part 2     [ September 28th 2009 ]
  158. Common Ground in Article 100 – Based on the 2011 NEC     [ February 23rd 2011 ]
  159. Communications Circuits - Article 800, based on the 2011 NEC®     [ April 9th 2013 ]
  160. Communications Systems - Understanding NEC Requirements     [ June 26th 2009 ]
  161. Conductor Size Matters     [ June 23rd 2008 ]
  162. Conductors for General Use - Based on the 2011 NEC     [ June 29th 2011 ]
  163. Developing Good NEC Proposals     [ September 4th 2008 ]
  164. Disconnect Requirements for Articles 422 through 450 – Based on the 2011 NEC     [ November 7th 2011 ]
  165. Dwelling Unit Calculations     [ April 28th 2009 ]
  166. ECM Questions     [ February 17th 2006 ]
  167. Electric Signs and Outline Lighting - Article 600, based on the 2011 NEC     [ January 23rd 2013 ]
  168. Electrical Services, Part 1     [ November 12th 2008 ]
  169. Electrical Services, Part 2     [ November 19th 2008 ]
  170. Emergency Systems - Article 700, based on the 2011 NEC®     [ March 6th 2013 ]
  171. Equipotential Grids Required by the NEC - Are they Useless?     [ March 14th 2007 ]
  172. EV Charging System - Article 625, based on the 2011 NEC     [ February 18th 2013 ]
  173. Evaluating Water-Damaged Electrical Equipment     [ January 10th 2007 ]
  174. FCC Information Sheet - Over-the-Air Reception Devices Rule     [ July 18th 2007 ]
  175. Feeder Taps     [ November 27th 2007 ]
  176. Fire Alarm Systems - Article 760, based on the 2011 NEC     [ May 28th 2013 ]
  177. Fire Pumps - Article 695, based on the 2011 NEC     [ February 28th 2013 ]
  178. Flexible Cords, Cables and Fixture Wire     [ January 8th 2010 ]
  179. FREE PDF Download! Article 680 - Swimming Pools, Spas, Hot Tubs, Fountains, and Similar Installations     [ March 6th 2006 ]
  180. Free Resource - 2011 NEC Index     [ September 26th 2011 ]
  181. Free Webcast - Critical Operations Power Systems - NEC Article 708     [ May 13th 2008 ]
  182. Generators and Standby Power Systems - Based on the 2011 NEC®     [ March 14th 2013 ]
  183. Grounding and Bonding of Separately Derived Systems     [ December 6th 2007 ]
  184. Grounding and Bonding, Part 1 - Based on the 2011NEC     [ May 9th 2011 ]
  185. Grounding and Bonding, Part 2 - Based on the 2011 NEC     [ May 30th 2011 ]
  186. Grounding and Bonding, Part 3 - Based on the 2011 NEC     [ June 14th 2011 ]
  187. Health Care Facilities     [ March 9th 2009 ]
  188. How much working space is enough?     [ August 14th 2008 ]
  189. Interconnected Electric Power Sources - Article 705, Based on the 2011 NEC®     [ May 7th 2013 ]
  190. Investigation on Branch/Feeder Arc Fault Circuit Interrupter Incorporating Equipment Ground Fault Protection     [ October 2nd 2008 ]
  191. Junction Box Sizing     [ June 30th 2008 ]
  192. Learn the 2011 Code Changes and Get Motivated with Mike Holt     [ June 8th 2012 ]
  193. Luminaires - Based on the 2011 NEC     [ October 12th 2011 ]
  194. Marinas and Boatyards - Article 555, based on the 2011 NEC     [ December 19th 2012 ]
  195. Most Common Installation Deficiencies - 1999 (Part 3 of 3)     [ January 25th 2006 ]
  196. Most Common Installation Deficiencies - 2002 (Part 2 of 3)     [ January 17th 2006 ]
  197. Most Common Installation Deficiencies - 2005 (Part 1 of 3)     [ January 11th 2006 ]
  198. Motor Calculations     [ July 7th 2008 ]
  199. Motors and the NEC - Based on the 2011 NEC     [ December 7th 2012 ]
  200. Multifamily Dwelling Unit Service and Feeder Calculations     [ June 15th 2009 ]
  201. NASA Gets it Wrong!     [ August 17th 2006 ]
  202. NEC 250.94 - Bonding for Other Systems     [ July 13th 2010 ]
  203. NEC Questions and Answers - March Part 1 of 2     [ March 15th 2007 ]
  204. NEC Questions and Answers - March Part 2 of 2     [ March 29th 2007 ]
  205. NEC Questions and Answers - May     [ May 16th 2006 ]
  206. NEC Questions and Answers June Part 1 of 2     [ June 19th 2007 ]
  207. NEC Questions and Answers June Part 2 of 2     [ July 6th 2007 ]
  208. NEC Questions and Answers May Part 1 of 2     [ May 15th 2007 ]
  209. NEC Questions and Answers May Part 2 of 2     [ May 31st 2007 ]
  210. NEC Questions and Answers – January 2007     [ January 29th 2007 ]
  211. NEMA Standards Publication - Application Guide for Electric Fire Pump Controllers     [ October 6th 2008 ]
  212. October NEC Questions and Answers     [ October 28th 2005 ]
  213. Ohio Reverts back to the 2005 NEC, but does it end there?     [ April 4th 2008 ]
  214. Optical Fiber Cables and Raceways - Article 770, based on the 2011 NEC®     [ March 12th 2013 ]
  215. Origins of the National Electrical Code     [ November 3rd 2008 ]
  216. Outside Branch Circuits and Feeders - Based on the 2011 NEC     [ September 7th 2012 ]
  217. Overcurrent Protection - Based on the 2011 NEC     [ October 4th 2012 ]
  218. Photovoltaic Power Systems and the 2005 National Electrical Code - Suggested Practices     [ October 31st 2006 ]
  219. Pools and Spas, Part 1 of 3     [ September 24th 2008 ]
  220. Pools and Spas, Part 2 of 3     [ October 8th 2008 ]
  221. Pools and Spas, Part 3 of 3     [ November 6th 2008 ]
  222. Raceway Fill     [ June 19th 2008 ]
  223. Raceways - Based on the 2011 NEC     [ August 15th 2011 ]
  224. Radio and Television Equipment - Article 810, based on the 2011 NEC     [ June 11th 2013 ]
  225. Report on Discussions During UL Meetings with Electrical Inspectors at the 2006 IAEI Section Meetings     [ September 19th 2007 ]
  226. Shedding Light on Article 410 - based on the 2011 NEC     [ November 19th 2012 ]
  227. Small Wind Electric Systems - Article 694, based on the 2011 NEC®     [ March 21st 2013 ]
  228. Solar Photovoltaic Systems - Part 1     [ August 4th 2010 ]
  229. Solar Photovoltaic Systems - Part 2     [ September 16th 2010 ]
  230. State Warns Of Faulty Satellite TV Installations     [ June 21st 2006 ]
  231. Subject - Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps     [ June 8th 2007 ]
  232. Successful Grounding Versus Bonding Live Webinar with Mike Holt     [ May 31st 2012 ]
  233. Surge Suppression Devices     [ January 16th 2009 ]
  234. Switchboards and Panelboards     [ January 29th 2010 ]
  235. Switches, Receptacles, and Panelboards – Based on the 2011 NEC     [ September 15th 2011 ]
  236. Taking 110.3(B) too far?     [ April 18th 2006 ]
  237. Temporary Installations     [ February 11th 2010 ]
  238. TIA No. 1005 on NFPA 70, National Electrical Code®, 2011 edition     [ March 14th 2011 ]
  239. Transformer Secondary Conductors     [ November 29th 2007 ]
  240. Understanding the NEC Rules for Backup Power Systems – Part 4 of 4     [ December 26th 2006 ]
  241. Updated Requirements for Services and Overcurrent Protection - Based on the 2011 NEC     [ April 6th 2011 ]
  242. What is all the Fuss About NEC Article 708?     [ June 20th 2008 ]
  243. Wiring Methods - Based on the 2011 NEC     [ June 21st 2011 ]
  244. Wiring Methods - Part 1 of 3     [ October 26th 2009 ]
  245. Wiring Methods - Part 2 of 3     [ November 11th 2009 ]
  246. Wiring Methods - Part 3 of 3     [ December 15th 2009 ]
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