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National Electrical Code Newsletters

  1. Equipment Bonded to the Equipment Grounding Conductor, based on the 2020 NEC     [ July 26th 2021 ]
  2. Code Video Series - Conductor Jamming     [ July 20th 2021 ]
  3. Bonding and Grounding - Implementing Article 250     [ June 21st 2021 ]
  4. Code Video Series - Emergency Disconnects - One- and Two-Family Dwellings     [ June 7th 2021 ]
  5. 210.8(F) and the 2020 NEC     [ May 27th 2021 ]
  6. Installing and Sizing Equipment Grounding Conductors     [ May 25th 2021 ]
  7. Code Video Series - Bonding, Other Enclosures     [ May 10th 2021 ]
  8. Equipment Grounding Conductors, based on the 2020 NEC     [ April 26th 2021 ]
  9. Bonding and Grounding, based on the 2020 NEC     [ March 29th 2021 ]
  10. Code Video Series - Emergency Systems, Definition [700.2]     [ March 8th 2021 ]
  11. Grounding Electrodes and Grounding Electrode Conductors, based on the 2020 NEC     [ February 22nd 2021 ]
  12. Code Video Series, repeat - Interconnected Electrical Power Production Sources [705.1]     [ February 15th 2021 ]
  13. Grounding Electrode System Requirements, based on the 2020 NEC, resent     [ February 8th 2021 ]
  14. Grounding Electrode System Requirements, based on the 2020 NEC     [ February 4th 2021 ]
  15. Code Video Series - Interconnected Electrical Power Production Sources [705.1]     [ February 1st 2021 ]
  16. Code Video Series - Conductor Insulation [310.4]     [ January 25th 2021 ]
  17. Separately Derived Systems, based on the 2020 NEC     [ January 20th 2021 ]
  18. Code Video Series - Multiwire Branch Circuit [210.4]     [ January 18th 2021 ]
  19. Code Video Series - Bonding, Metal Raceways [250.97]     [ January 11th 2021 ]
  20. Code Video Series - Marina and Boat Dock Leakage Current Measurement Device [555.35(B)]     [ January 5th 2021 ]
  21. Code Video Series - Electric Vehicle Power Transfer System, Scope [625.1]     [ December 28th 2020 ]
  22. Code Video Series - Energy Storage Systems (ESS), Scope [706.1]     [ December 14th 2020 ]
  23. Code Video Series - Arc-Flash Hazard Warning [110.16]     [ December 2nd 2020 ]
  24. The Difference Between Bonding and Grounding - Part 1, based on the 2020 NEC     [ November 27th 2020 ]
  25. Class 2 Circuit Requirements, based on the 2020 NEC     [ October 28th 2020 ]
  26. Code Video Series - Overvoltage Protection, Article 242     [ October 19th 2020 ]
  27. Class 1 Circuit Requirements, based on the 2020 NEC     [ September 28th 2020 ]
  28. GFCI Protection - 210.8, based on the 2020 NEC     [ September 7th 2020 ]
  29. Fire Pump Systems, based on the 2020 NEC     [ August 26th 2020 ]
  30. Marinas and Boatyards, based on the 2020 NEC     [ July 28th 2020 ]
  31. A/C and Refrigeration Equipment, based on the 2020 NEC     [ July 8th 2020 ]
  32. NEC Questions and Answers, based on the 2020 NEC - June 2020     [ June 16th 2020 ]
  33. Overvoltage Protection, based on the 2020 NEC     [ April 8th 2020 ]
  34. Load Calculations - Part 2, based on the 2020 NEC     [ March 11th 2020 ]
  35. Load Calculations - Part 1, based on the 2020 NEC     [ February 12th 2020 ]
  36. AFCIs and GFCIs     [ January 8th 2020 ]
  37. General Requirements, based on the 2020 NEC     [ December 5th 2019 ]
  38. Transformer Calculations     [ November 6th 2019 ]
  39. Understanding the NEC Series #7 - Sizing Equipment Grounding Conductor     [ September 23rd 2019 ]
  40. Solar Photovoltaic Systems, based on 2017 NEC - Part 2     [ September 12th 2019 ]
  41. Understanding the NEC Series #6 - Sizing Conductors 4 AWG and Larger     [ August 19th 2019 ]
  42. Solar Photovoltaic Systems, based on 2017 NEC - Part 1     [ August 8th 2019 ]
  43. Understanding the NEC Series #5 - Grounding and Bonding of Switches     [ July 22nd 2019 ]
  44. Motor Calculations based on the 2017 NEC - Part 2     [ July 9th 2019 ]
  45. Understanding the NEC Series #4 - Feeder Conductor Sizing     [ June 17th 2019 ]
  46. Understanding the NEC Series #3 - Swimming Pool Bonding     [ May 20th 2019 ]
  47. Conductor Sizing, based on 2017 NEC - Part 2     [ May 8th 2019 ]
  48. Understanding the NEC Series #2 - How to Use the NEC     [ April 23rd 2019 ]
  49. Conductor Sizing, based on 2017 NEC - Part 1     [ April 10th 2019 ]
  50. Understanding the NEC Series #1 - 90.1 Purpose of the NEC     [ March 25th 2019 ]
  51. Sizing Junction Boxes and Pull Boxes, based on the 2017 NEC     [ March 6th 2019 ]
  52. NEC Requirements for Sizing Outlet Boxes, based on 2017 NEC     [ February 6th 2019 ]
  53. Services, based on the 2017 NEC - Part 2     [ January 8th 2019 ]
  54. Services, based on the 2017 NEC - Part 1     [ December 6th 2018 ]
  55. Radio and TV Equipment and Coaxial Cables, based on the 2017 NEC     [ November 19th 2018 ]
  56. Fire Alarm Systems, based on the 2017 NEC     [ October 9th 2018 ]
  57. NEC Questions and Answers, based on the 2017 NEC - September 2018     [ September 26th 2018 ]
  58. Interconnected Electric Power Production Sources, based on the 2017 NEC     [ September 20th 2018 ]
  59. Evaluation of Electrical Feeder and Branch Circuit Loading: Phase 1     [ September 13th 2018 ]
  60. Standby Power Systems, based on the 2017 NEC     [ August 9th 2018 ]
  61. Free Resource - 2017 NEC Index     [ June 28th 2018 ]
  62. Understanding Requirements for Electric Signs and Outline Lighting     [ June 12th 2018 ]
  63. Understanding Requirements for Commercial Garages and Fuel based on the 2017 NEC     [ May 31st 2018 ]
  64. Understanding Requirements for Hazardous Locations, based on the 2017 NEC     [ April 24th 2018 ]
  65. Understanding Requirements for Generators, based on the 2017 NEC     [ February 22nd 2018 ]
  66. Understanding Requirements for Appliances - Article 422, based on 2017 NEC     [ January 31st 2018 ]
  67. Understanding Raceways     [ December 7th 2017 ]
  68. Do you know one type of cable from another     [ November 29th 2017 ]
  69. Article 680 - Permanently Installed Swimming Pools, based on the 2017 NEC - Part II of II     [ October 18th 2017 ]
  70. 2020 NEC     [ October 9th 2017 ]
  71. Article 680 - Permanently Installed Swimming Pools, based on the 2017 NEC. Part I of II     [ September 19th 2017 ]
  72. Article 590 - Temporary Installations, based on the 2017 NEC     [ August 22nd 2017 ]
  73. Article 555 - Marinas, Boatyards, and Docking Facilities, based on the 2017 NEC     [ July 20th 2017 ]
  74. Article 517 - Health Care Facilities, based on the 2017 NEC     [ June 14th 2017 ]
  75. Article 404 - Switches and Receptacles, based on the 2017 NEC     [ May 17th 2017 ]
  76. Article 310 - Conductors for General Wiring, based on the 2017 NEC     [ April 25th 2017 ]
  77. Article 250 - Grounding and Bonding, based on the 2017 NEC - Part 1 of 2     [ February 28th 2017 ]
  78. Article 210 - Receptacles in Dwellings, based on the 2017 NEC     [ December 8th 2016 ]
  79. Class 2 and 3 Circuits - Article 725 based on the 2014 NEC     [ August 30th 2016 ]
  80. Class 1 Circuits - Article 725 based on the 2014 NEC     [ June 28th 2016 ]
  81. Fire Pumps - Article 695 based on the 2014 NEC     [ April 26th 2016 ]
  82. Solar Photovoltaic Systems Part 3 - Article 690 based on the 2014 NEC     [ March 24th 2016 ]
  83. Free Mike Holt Publication - Swimming Pools, Spas, Hot Tubs, based on the 2014 NEC     [ March 10th 2016 ]
  84. Free Mike Holt Publication - Solar PV Identification Requirements, based on the 2014 NEC     [ February 18th 2016 ]
  85. Solar Photovoltaic Systems Part 2 - Article 690 based on the 2014 NEC     [ February 16th 2016 ]
  86. Solar Photovoltaic Systems Part 1 - Article 690 based on the 2014 NEC     [ January 12th 2016 ]
  87. Air-Conditioning and Refrigeration Equipment, based on the 2014 NEC     [ December 15th 2015 ]
  88. Fixed Electric Space-Heating Equipment - based on the 2014 NEC     [ November 12th 2015 ]
  89. Free Mike Holt Publication - Radio and Television Equipment - 2014 NEC     [ October 13th 2015 ]
  90. From the Desk of Mike Holt - NEC Conductors and protection for air-conditioning equipment     [ October 10th 2015 ]
  91. Switchboards, Switchgear, and Panelboards - Based on the 2014 NEC     [ October 7th 2015 ]
  92. Free Mike Holt Publication - Marinas and Boatyards, Article 555 - 2014 NEC     [ September 24th 2015 ]
  93. GFCIs and AFCIs - Based on the 2014 NEC     [ September 10th 2015 ]
  94. New UL GFCI Standard     [ August 26th 2015 ]
  95. Flexible Cords - Based on the 2014 NEC     [ August 7th 2015 ]
  96. Attention NEC Book Collectors!     [ July 28th 2015 ]
  97. NEC Questions and Answers - July 2015 - Based on the 2014 NEC     [ July 22nd 2015 ]
  98. Transformer Calculations - Based on the 2014 NEC     [ July 14th 2015 ]
  99. 2017 NEC Changes - Top 16     [ July 8th 2015 ]
  100. Commercial Load Calculations, Part 2 - Based on the 2014 NEC     [ June 17th 2015 ]
  101. Free Mike Holt Publication - Fire Alarm Systems, Article 760 - 2014 NEC     [ May 28th 2015 ]
  102. NEC Questions and Answers - May 2015 - Based on the 2014 NEC     [ May 25th 2015 ]
  103. Commercial Load Calculations, Part 1 - Based on the 2014 NEC     [ May 8th 2015 ]
  104. Multifamily Dwelling Unit Load Calculations - Based on the 2014 NEC     [ April 20th 2015 ]
  105. NEC Charts Compiled Over Years of Research     [ March 27th 2015 ]
  106. One-Family Dwelling Unit Load Calculations - Based on the 2014 NEC     [ March 20th 2015 ]
  107. Free Resource - 2014 NEC Index     [ March 12th 2015 ]
  108. NEC Questions and Answers - March 2015 - Based on the 2014 NEC     [ March 6th 2015 ]
  109. Motor Calculations, Part 2 - Based on the 2014 NEC     [ February 9th 2015 ]
  110. NEC Questions and Answers - January 2014 - Based on the 2014 NEC     [ January 16th 2015 ]
  111. Motor Calculations, Part 1 - based on the 2014 NEC     [ January 5th 2015 ]
  112. NEC Questions and Answers - December 2014 - Based on the 2014 NEC     [ December 29th 2014 ]
  113. Conductor Sizing, Part 2 - based on the 2014 NEC     [ December 12th 2014 ]
  114. Conductor Sizing, Part 1 - based on the 2014 NEC     [ November 17th 2014 ]
  115. 2014 NEC Questions and Answers - November 2014     [ November 14th 2014 ]
  116. Box Sizing — based on the 2014 NECŪ     [ October 13th 2014 ]
  117. Section 680.26 Equipotential Bonding     [ October 10th 2014 ]
  118. Raceway Sizing — based on the 2014 NECŪ     [ September 11th 2014 ]
  119. Article 400 — Flexible Cords and Flexible Cables, based on the 2014 NECŪ     [ August 28th 2014 ]
  120. Health Care Facilities — Article 517, based on the 2014 NEC     [ August 18th 2014 ]
  121. Transformers — Article 450, based on the 2014 NECŪ     [ July 16th 2014 ]
  122. Switches, Receptacles, Cord Connectors, and Caps - Based on the 2014 NEC     [ June 27th 2014 ]
  123. Articles 310, 312, 314 - The Four Pillars of Chapter Three, based on the 2014 NEC     [ June 16th 2014 ]
  124. Article 300 - Branch-Circuit, Feeder, and Service Calculations     [ May 29th 2014 ]
  125. Article 250 - Grounding and Bonding Part 2, Based on the 2014 NEC     [ May 7th 2014 ]
  126. Article 250 - Grounding and Bonding Part 1, Based on the 2014 NEC     [ April 15th 2014 ]
  127. Article 230 - Services, based on the 2014 NEC     [ March 18th 2014 ]
  128. Article 210 - Branch Circuits, based on the 2014 NECŪ     [ February 18th 2014 ]
  129. Article 110 - Requirements for Electrical Installations - Based on the 2014 NEC     [ January 14th 2014 ]
  130. 2011 Changes to the NEC - 300.22     [ November 26th 2013 ]
  131. 2011 Changes to the NEC - 300.3     [ October 24th 2013 ]
  132. 2011 Changes to the NEC - 250.118     [ September 12th 2013 ]
  133. 2011 Changes to the NEC - 250.104     [ August 13th 2013 ]
  134. CATV and Radio Distribution Systems - Article 820, based on the 2011 NEC     [ June 18th 2013 ]
  135. Radio and Television Equipment - Article 810, based on the 2011 NEC     [ June 11th 2013 ]
  136. Fire Alarm Systems - Article 760, based on the 2011 NEC     [ May 28th 2013 ]
  137. 2011 NEC Questions and Answers - May 2013     [ May 21st 2013 ]
  138. Interconnected Electric Power Sources - Article 705, Based on the 2011 NECŪ     [ May 7th 2013 ]
  139. Air Conditioning and Refrigeration Equipment - Article 440, based on the 2011 NECŪ     [ April 15th 2013 ]
  140. Communications Circuits - Article 800, based on the 2011 NECŪ     [ April 9th 2013 ]
  141. Small Wind Electric Systems - Article 694, based on the 2011 NECŪ     [ March 21st 2013 ]
  142. Generators and Standby Power Systems - Based on the 2011 NECŪ     [ March 14th 2013 ]
  143. Optical Fiber Cables and Raceways - Article 770, based on the 2011 NECŪ     [ March 12th 2013 ]
  144. Emergency Systems - Article 700, based on the 2011 NECŪ     [ March 6th 2013 ]
  145. Fire Pumps - Article 695, based on the 2011 NEC     [ February 28th 2013 ]
  146. 2011 Changes to the NEC - 250.102     [ February 22nd 2013 ]
  147. EV Charging System - Article 625, based on the 2011 NEC     [ February 18th 2013 ]
  148. 2011 Changes to the NEC - 250.94     [ January 25th 2013 ]
  149. Electric Signs and Outline Lighting - Article 600, based on the 2011 NEC     [ January 23rd 2013 ]
  150. 2011 Changes to the NEC - 250.92     [ January 9th 2013 ]
  151. Marinas and Boatyards - Article 555, based on the 2011 NEC     [ December 19th 2012 ]
  152. 2011 Changes to the NEC - 250.64     [ December 14th 2012 ]
  153. Motors and the NEC - Based on the 2011 NEC     [ December 7th 2012 ]
  154. 2011 Changes to the NEC - 250.52     [ November 27th 2012 ]
  155. Shedding Light on Article 410 - based on the 2011 NEC     [ November 19th 2012 ]
  156. 2011 Changes to the NEC - 250.32     [ November 7th 2012 ]
  157. 2011 Changes to the NEC - 250.30     [ October 22nd 2012 ]
  158. 2011 NEC Questions and Answers - October 2012     [ October 12th 2012 ]
  159. 2011 Changes to the NEC — 250.24     [ October 8th 2012 ]
  160. Overcurrent Protection - Based on the 2011 NEC     [ October 4th 2012 ]
  161. 2011 Changes to the NEC — 250.6     [ September 24th 2012 ]
  162. 2011 Changes to the NEC — 250.4     [ September 13th 2012 ]
  163. Outside Branch Circuits and Feeders - Based on the 2011 NEC     [ September 7th 2012 ]
  164. 2011 NEC Questions and Answers - August 2012     [ August 28th 2012 ]
  165. 2011 Changes to the NEC - 240.21     [ August 24th 2012 ]
  166. Alternative Energy Systems, Part 2 - Based on the 2011 NEC     [ August 13th 2012 ]
  167. 2011 Changes to the NEC - 240.4     [ August 10th 2012 ]
  168. 2011 Changes to the NEC - 210.12     [ July 23rd 2012 ]
  169. 2011 NEC Questions and Answers - July 2012     [ July 17th 2012 ]
  170. 2011 Changes to the NEC - 210.8     [ July 11th 2012 ]
  171. Alternative Energy Systems, Part 1     [ June 29th 2012 ]
  172. 2011 Changes to the NEC - 210.5     [ June 25th 2012 ]
  173. 2011 NEC Questions and Answers - June 2012     [ June 19th 2012 ]
  174. Learn the 2011 Code Changes and Get Motivated with Mike Holt     [ June 8th 2012 ]
  175. 2011 Changes to the NEC - 210.4     [ June 6th 2012 ]
  176. Successful Grounding Versus Bonding Live Webinar with Mike Holt     [ May 31st 2012 ]
  177. 2011 Changes to the NEC - 200.6     [ May 29th 2012 ]
  178. Article 680: Swimming Pools and Spas     [ May 25th 2012 ]
  179. 2011 Changes to the NEC - 110.26     [ May 14th 2012 ]
  180. 2011 Changes to the NEC - 110.24     [ April 25th 2012 ]
  181. 2011 NEC Questions and Answers - April 2012     [ April 20th 2012 ]
  182. Article 645: Information Technology Equipment     [ April 17th 2012 ]
  183. 2011 Changes to the NEC - 110.16     [ April 12th 2012 ]
  184. Articles 547 through 590     [ March 27th 2012 ]
  185. 2011 Changes to the NEC — 110.14     [ March 22nd 2012 ]
  186. 2011 Changes to the NEC — 110.3     [ March 12th 2012 ]
  187. 2011 NEC Questions & Answers Part 2 - February 2012     [ February 28th 2012 ]
  188. Articles 514 through 525     [ February 21st 2012 ]
  189. 2011 Changes to the NEC — 90.2     [ February 17th 2012 ]
  190. 2011 NEC Questions & Answers Part 1 - February 2012     [ February 10th 2012 ]
  191. 2011 NEC Questions & Answers - January 2012     [ January 17th 2012 ]
  192. Class I Hazardous Locations — Based on the 2011 NEC     [ January 11th 2012 ]
  193. 2011 NEC Questions & Answers - December 2011     [ December 21st 2011 ]
  194. Disconnect Requirements for Articles 422 through 450 — Based on the 2011 NEC     [ November 7th 2011 ]
  195. 2011 NEC Questions & Answers - October 2011 Part 2 of 2     [ November 1st 2011 ]
  196. 2011 NEC Questions & Answers - October 2011 Part 1 of 2     [ October 18th 2011 ]
  197. Luminaires - Based on the 2011 NEC     [ October 12th 2011 ]
  198. Free Resource - 2011 NEC Index     [ September 26th 2011 ]
  199. 2011 NEC Questions & Answers - September 2011 Part 2 of 2     [ September 20th 2011 ]
  200. Switches, Receptacles, and Panelboards — Based on the 2011 NEC     [ September 15th 2011 ]
  201. Raceways - Based on the 2011 NEC     [ August 15th 2011 ]
  202. Cables and the Code — Based on the 2011 NEC     [ August 9th 2011 ]
  203. Article 810 - Radio and Television Equipment - Free Booklet     [ July 22nd 2011 ]
  204. Boxes, conduit bodies, and handhole enclosures - Based on the 2011 NEC     [ July 19th 2011 ]
  205. Conductors for General Use - Based on the 2011 NEC     [ June 29th 2011 ]
  206. Wiring Methods - Based on the 2011 NEC     [ June 21st 2011 ]
  207. 2011 NEC Questions & Answers - June 2011     [ June 16th 2011 ]
  208. Grounding and Bonding, Part 3 - Based on the 2011 NEC     [ June 14th 2011 ]
  209. Grounding and Bonding, Part 2 - Based on the 2011 NEC     [ May 30th 2011 ]
  210. 2011 NEC Questions & Answers - May 2011     [ May 24th 2011 ]
  211. Can You Spot the 2011 Code Violations (with answers)?     [ May 12th 2011 ]
  212. Grounding and Bonding, Part 1 - Based on the 2011NEC     [ May 9th 2011 ]
  213. Updated Requirements for Services and Overcurrent Protection - Based on the 2011 NEC     [ April 6th 2011 ]
  214. 2011 NECŪ - Changes of Interest to the Data/Comm Industry     [ March 16th 2011 ]
  215. TIA No. 1005 on NFPA 70, National Electrical CodeŪ, 2011 edition     [ March 14th 2011 ]
  216. Article 110: Requirements for Electrical Installations — Based on the 2011 NEC     [ February 28th 2011 ]
  217. Common Ground in Article 100 — Based on the 2011 NEC     [ February 23rd 2011 ]
  218. Branch Circuits - Part 2 of 2     [ November 29th 2010 ]
  219. Branch Circuits - Part 1     [ October 26th 2010 ]
  220. Solar Photovoltaic Systems - Part 2     [ September 16th 2010 ]
  221. Solar Photovoltaic Systems - Part 1     [ August 4th 2010 ]
  222. NEC 250.94 - Bonding for Other Systems     [ July 13th 2010 ]
  223. Commercial Garages     [ March 11th 2010 ]
  224. Temporary Installations     [ February 11th 2010 ]
  225. Switchboards and Panelboards     [ January 29th 2010 ]
  226. Article 760 Fire Alarm Systems     [ January 19th 2010 ]
  227. Flexible Cords, Cables and Fixture Wire     [ January 8th 2010 ]
  228. Wiring Methods - Part 3 of 3     [ December 15th 2009 ]
  229. Article 680 Pools and Similar Installations - 2008 NEC     [ November 24th 2009 ]
  230. Wiring Methods - Part 2 of 3     [ November 11th 2009 ]
  231. Wiring Methods - Part 1 of 3     [ October 26th 2009 ]
  232. Article 680 Pools and Similar Installations - Part 1 of 2     [ October 12th 2009 ]
  233. Commercial Load Calculations - Part 2     [ September 28th 2009 ]
  234. Backup Power Systems - 2008 Edition Part 4 of 4     [ August 25th 2009 ]
  235. Commercial Load Calculations - Part 1     [ August 11th 2009 ]
  236. Backup Power Systems - 2008 Edition Part 3 of 4     [ July 22nd 2009 ]
  237. 2011 NEC Accepted Revisions     [ July 13th 2009 ]
  238. Communications Systems - Understanding NEC Requirements     [ June 26th 2009 ]
  239. Backup Power Systems - 2008 Edition Part 2 of 4     [ June 24th 2009 ]
  240. Multifamily Dwelling Unit Service and Feeder Calculations     [ June 15th 2009 ]
  241. Backup Power Systems - 2008 Edition Part 1 of 4     [ May 18th 2009 ]
  242. Dwelling Unit Calculations     [ April 28th 2009 ]
  243. Health Care Facilities     [ March 9th 2009 ]
  244. Air Conditioning and Refrigeration Equipment     [ February 17th 2009 ]
  245. Surge Suppression Devices     [ January 16th 2009 ]
  246. Electrical Services, Part 2     [ November 19th 2008 ]
  247. Electrical Services, Part 1     [ November 12th 2008 ]
  248. Pools and Spas, Part 3 of 3     [ November 6th 2008 ]
  249. Origins of the National Electrical Code     [ November 3rd 2008 ]
  250. Pools and Spas, Part 2 of 3     [ October 8th 2008 ]
  251. NEMA Standards Publication - Application Guide for Electric Fire Pump Controllers     [ October 6th 2008 ]
  252. Investigation on Branch/Feeder Arc Fault Circuit Interrupter Incorporating Equipment Ground Fault Protection     [ October 2nd 2008 ]
  253. Pools and Spas, Part 1 of 3     [ September 24th 2008 ]
  254. 2008 NEC Questions and Answers September     [ September 9th 2008 ]
  255. Developing Good NEC Proposals     [ September 4th 2008 ]
  256. How much working space is enough?     [ August 14th 2008 ]
  257. 2008 NEC Questions and Answers August     [ August 7th 2008 ]
  258. Box Fill Calculations     [ July 24th 2008 ]
  259. Motor Calculations     [ July 7th 2008 ]
  260. Junction Box Sizing     [ June 30th 2008 ]
  261. Conductor Size Matters     [ June 23rd 2008 ]
  262. What is all the Fuss About NEC Article 708?     [ June 20th 2008 ]
  263. Raceway Fill     [ June 19th 2008 ]
  264. 2008 NEC Questions and Answers June Part 1     [ June 12th 2008 ]
  265. 2008 NEC Questions and Answers May Part 1     [ May 16th 2008 ]
  266. Free Webcast - Critical Operations Power Systems - NEC Article 708     [ May 13th 2008 ]
  267. 2008 NEC Questions and Answers April Part 2     [ April 30th 2008 ]
  268. 2008 NEC Questions and Answers April Part 1     [ April 10th 2008 ]
  269. Ohio Reverts back to the 2005 NEC, but does it end there?     [ April 4th 2008 ]
  270. 2008 NEC Questions and Answers March - Part 1     [ March 12th 2008 ]
  271. Article 600: Electric Signs and Outline Lighting     [ February 18th 2008 ]
  272. Article 450: Transformers and Transformer Vaults     [ February 1st 2008 ]
  273. Article 424: Fixed Electric Space-heating     [ January 18th 2008 ]
  274. 2008 NEC Questions and Answers January - Part 2     [ January 15th 2008 ]
  275. 2008 NEC Questions and Answers January Part 1 of 2     [ January 4th 2008 ]
  276. Article 760 Fire Alarm Systems - 760.21     [ December 14th 2007 ]
  277. Grounding and Bonding of Separately Derived Systems     [ December 6th 2007 ]
  278. Article 725 Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits - 725.61     [ November 30th 2007 ]
  279. Transformer Secondary Conductors     [ November 29th 2007 ]
  280. Feeder Taps     [ November 27th 2007 ]
  281. Article 725 Class 1, 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits - 725.3     [ November 16th 2007 ]
  282. Article 695 Fire Pumps - 695.6     [ November 2nd 2007 ]
  283. Article 680 Swimmng Pools, Spas, Hot Tubs, Fountains, and Similar Installations - 680.26     [ October 19th 2007 ]
  284. 250.6 Objectionable Current     [ October 10th 2007 ]
  285. Attend an EC&M 2008 NEC Code Change Conference at a reduced registration fee!     [ October 8th 2007 ]
  286. Article 680 Swimming Pools, Spas, Hot Tubs, Fountains, and Similar Installations     [ October 5th 2007 ]
  287. Code Changes Preview - Free Online Seminar Friday     [ October 4th 2007 ]
  288. Article 590 Temporary Installations - 590.4     [ September 28th 2007 ]
  289. Article 555 Marinas and Boatyards - 555.22     [ September 21st 2007 ]
  290. Report on Discussions During UL Meetings with Electrical Inspectors at the 2006 IAEI Section Meetings     [ September 19th 2007 ]
  291. Article 547 Agricultural Buildings - 547.10     [ September 14th 2007 ]
  292. Article 547 Agricultural Buildings - 547.5     [ September 7th 2007 ]
  293. Article 513 Aircraft Hangars - 513.12     [ August 24th 2007 ]
  294. Article 501 Class I Locations - 501.15     [ August 17th 2007 ]
  295. Article 422 Appliances - 422.16 Flexible Cords     [ August 3rd 2007 ]
  296. Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps - 410.110     [ July 27th 2007 ]
  297. FCC Information Sheet - Over-the-Air Reception Devices Rule     [ July 18th 2007 ]
  298. NEC Questions and Answers June Part 2 of 2     [ July 6th 2007 ]
  299. Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps - 410.73     [ June 29th 2007 ]
  300. NEC Questions and Answers June Part 1 of 2     [ June 19th 2007 ]
  301. Subject - Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps     [ June 8th 2007 ]
  302. Article 408 Switchboards and Panelboards - 408.7     [ June 1st 2007 ]
  303. NEC Questions and Answers May Part 2 of 2     [ May 31st 2007 ]
  304. Article 408 Switchboards and Panelboards - 408.4     [ May 25th 2007 ]
  305. Article 240: Overcurrent Protection     [ May 22nd 2007 ]
  306. Article 406 Receptacles, Cord Connectors, and Attachment Plugs - 406.8 Cont.     [ May 18th 2007 ]
  307. Article 230: Services, Part 2: Conductor Requirements     [ May 16th 2007 ]
  308. NEC Questions and Answers May Part 1 of 2     [ May 15th 2007 ]
  309. Article 225: Outside Branch Circuits     [ May 9th 2007 ]
  310. Article 215: Feeders     [ May 2nd 2007 ]
  311. Article 406 Receptacles, Cord Connectors, and Attachment Plugs - 406.4     [ April 27th 2007 ]
  312. Article 400 Flexible Cords - 400.5     [ April 20th 2007 ]
  313. Article 230: Services, Part 1: Equipment Requirements     [ April 17th 2007 ]
  314. Article 348 Flexible Metal Conduit: Type FMC - 348.30     [ April 13th 2007 ]
  315. Article 330 Metal-Clad Cable: Type MC - 330.108     [ March 30th 2007 ]
  316. NEC Questions and Answers - March Part 2 of 2     [ March 29th 2007 ]
  317. Article 330 Metal-Clad Cable: Type MC - 330.30     [ March 16th 2007 ]
  318. NEC Questions and Answers - March Part 1 of 2     [ March 15th 2007 ]
  319. Equipotential Grids Required by the NEC - Are they Useless?     [ March 14th 2007 ]
  320. Article 320 Armored Cable: Type AC     [ March 9th 2007 ]
  321. Article 314 Outlet Device, Pull and Junction Boxes, Conduit Bodies, and Handhole Enclosures     [ March 2nd 2007 ]
  322. Article 310 Conductors for General Wiring     [ February 23rd 2007 ]
  323. Article 210: Branch Circuits, Part Two: GFCIs and AFCIs     [ February 20th 2007 ]
  324. Article 250 Grounding and Bonding 250.64     [ February 16th 2007 ]
  325. Article 250 Grounding and Bonding 250.52     [ February 9th 2007 ]
  326. AFCIs on the Brink     [ February 6th 2007 ]
  327. Article 210: Branch Circuits, Part One: Conductor sizing and Overcurrent Protection     [ January 31st 2007 ]
  328. NEC Questions and Answers — January 2007     [ January 29th 2007 ]
  329. Article 250 Grounding and Bonding 250.34     [ January 26th 2007 ]
  330. Article 250 Grounding and Bonding 250.8     [ January 12th 2007 ]
  331. Evaluating Water-Damaged Electrical Equipment     [ January 10th 2007 ]
  332. Article 820: Community Antenna Television (CATV) and Radio Distribution Systems     [ January 5th 2007 ]
  333. Understanding the NEC Rules for Backup Power Systems — Part 4 of 4     [ December 26th 2006 ]
  334. Article 250 Grounding and Bonding 250.4     [ December 22nd 2006 ]
  335. Article 250 Grounding and Bonding 250.2     [ December 15th 2006 ]
  336. Article 240 Overcurrent Protection     [ December 9th 2006 ]
  337. Article 810 Radio and Television Equipment     [ December 4th 2006 ]
  338. Article 210 Branch Circuits 210.8     [ November 10th 2006 ]
  339. Article 800: Communications Circuits     [ November 6th 2006 ]
  340. Article 210 Branch Circuits 210.8     [ November 3rd 2006 ]
  341. Photovoltaic Power Systems and the 2005 National Electrical Code - Suggested Practices     [ October 31st 2006 ]
  342. Article 210 Branch Circuits 210.5     [ October 27th 2006 ]
  343. Article 210 Branch Circuits 210.4     [ October 20th 2006 ]
  344. Article 100 General: Separately Derived Systems     [ October 13th 2006 ]
  345. Article 100 General: Solidly Grounded     [ October 6th 2006 ]
  346. Article 100 General: System Bonding Jumper     [ September 29th 2006 ]
  347. Article 90 Introduction     [ September 22nd 2006 ]
  348. NASA Gets it Wrong!     [ August 17th 2006 ]
  349. Article 770: Optical Fiber Cables     [ July 26th 2006 ]
  350. Article 760: Fire Alarm Systems     [ July 24th 2006 ]
  351. State Warns Of Faulty Satellite TV Installations     [ June 21st 2006 ]
  352. Article 725: Class 2 and 3 Remote-Control, Signaling, and Power-Limited Circuits (Part 2 of 2)     [ May 30th 2006 ]
  353. NEC Questions and Answers - May     [ May 16th 2006 ]
  354. Article 725: Class 1 Remote-Control, Signaling, and Power-Limited Circuits     [ May 8th 2006 ]
  355. Articles 701 and 702: Legally Required and Optional Standby Systems     [ May 4th 2006 ]
  356. Article 700: Emergency Systems     [ April 20th 2006 ]
  357. Taking 110.3(B) too far?     [ April 18th 2006 ]
  358. April NEC Questions and Answers     [ April 18th 2006 ]
  359. FREE PDF Download! Article 680 - Swimming Pools, Spas, Hot Tubs, Fountains, and Similar Installations     [ March 6th 2006 ]
  360. ECM Questions     [ February 17th 2006 ]
  361. Article 695: Fire Pumps     [ February 14th 2006 ]
  362. Article 645: Information Technology Equipment     [ February 7th 2006 ]
  363. Article 555: Marinas and Boatyards     [ January 27th 2006 ]
  364. Most Common Installation Deficiencies - 1999 (Part 3 of 3)     [ January 25th 2006 ]
  365. Most Common Installation Deficiencies - 2002 (Part 2 of 3)     [ January 17th 2006 ]
  366. Most Common Installation Deficiencies - 2005 (Part 1 of 3)     [ January 11th 2006 ]
  367. Article 525: Carnivals, Circuses, Fairs, and Similar Events     [ November 29th 2005 ]
  368. Article 501: Class I Locations     [ November 10th 2005 ]
  369. October NEC Questions and Answers     [ October 28th 2005 ]
  370. Article 500: Hazardous (classified) Locations     [ October 27th 2005 ]

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