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National Electrical Code Newsletters

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The content provided below is only appropriate for qualified electrical professionals. We do not support DIY electrical work in any capacity. The risks for shock, and fire are too great. If you are a homeowner we recommend you contact a qualified electrical contractor to do any work in your home.

NEC Questions and Answers, based on the 2020 NEC - May 2022 [ May 17^th 2022 ]
NEC Questions and Answers, based on the 2020 NEC - April 2022 [ April 12^th 2022 ]
Livestream Video - Are Boxes Required for Splices and Terminations [ April 4^th 2022 ]
Code Video Series - Hazardous Classified Locations [500.5] [ March 28^th 2022 ]
Pull Boxes and Junction Boxes [ March 21^st 2022 ]
NEC Questions and Answers, based on the 2020 NEC - March 2022 [ March 15^th 2022 ]
Livestream Video - Tell me more about lightning and electrical systems [ March 7^th 2022 ]
Pools and Spas, Part 2, based on the 2020 NEC [ February 21^st 2022 ]
NEC Questions and Answers, based on the 2020 NEC - February 2022 [ February 15^th 2022 ]
Code Video Series - Interconnected Electrical Power Production Sources, Supply-Side Source Connections [705.11] [ February 7^th 2022 ]
How to Use the NEC [ January 28^th 2022 ]
Pools and Spas, based on the 2020 NEC, Part 1 [ January 24^th 2022 ]
Code Video Series - Feeder and Service Conductor Size [Table 310.12] [ January 17^th 2022 ]
NEC Questions and Answers, based on the 2020 NEC - January 2022 [ January 13^th 2022 ]
Code Video Series - Fire Rated Walls, Ceilings and Floors [300.21] [ December 20^th 2021 ]
Dwelling Load Calculations, based on the 2020 NEC [ December 13^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - December 2021 [ December 7^th 2021 ]
Code Video Series - Bonding, Radio Antenna Grounding [810.21] [ November 22^nd 2021 ]
Livestream Video - Ground Rods at Metal Poles [ November 18^th 2021 ]
Communications Systems Installations, based on the 2020 NEC [ November 15^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - November 2021 [ November 9^th 2021 ]
Code Video Series - Service Disconnecting Means [ October 18^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - September 2021 [ September 21^st 2021 ]
Code Video Series - Fire Pump Motor Circuits [695.6(B)] [ September 14^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - August 2021, P2 [ August 31^st 2021 ]
Special Occupancy Installations, based on the 2020 NEC [ August 23^rd 2021 ]
Code Video Series - Interconnected Electrical Power Production Sources, Power Control Systems [705.13] [ August 16^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - August 2021 [ August 10^th 2021 ]
Equipment Bonded to the Equipment Grounding Conductor, based on the 2020 NEC [ July 26^th 2021 ]
Code Video Series - Conductor Jamming [ July 20^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - July 2021 [ July 13^th 2021 ]
Bonding and Grounding - Implementing Article 250 [ June 21^st 2021 ]
NEC Questions and Answers, based on the 2020 NEC - June 2021 [ June 15^th 2021 ]
Code Video Series - Emergency Disconnects - One- and Two-Family Dwellings [ June 7^th 2021 ]
210.8(F) and the 2020 NEC [ May 27^th 2021 ]
Installing and Sizing Equipment Grounding Conductors [ May 25^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - May 2021 [ May 18^th 2021 ]
Code Video Series - Bonding, Other Enclosures [ May 10^th 2021 ]
Equipment Grounding Conductors, based on the 2020 NEC [ April 26^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - April 2021 [ April 13^th 2021 ]
Bonding and Grounding, based on the 2020 NEC [ March 29^th 2021 ]
NEC Questions and Answers, based on the 2020 NEC - March 2021 [ March 16^th 2021 ]
Code Video Series - Emergency Systems, Definition [700.2] [ March 8^th 2021 ]
Grounding Electrodes and Grounding Electrode Conductors, based on the 2020 NEC [ February 22^nd 2021 ]
Code Video Series, repeat - Interconnected Electrical Power Production Sources [705.1] [ February 15^th 2021 ]
Grounding Electrode System Requirements, based on the 2020 NEC, resent [ February 8^th 2021 ]
Grounding Electrode System Requirements, based on the 2020 NEC [ February 4^th 2021 ]
Code Video Series - Interconnected Electrical Power Production Sources [705.1] [ February 1^st 2021 ]
Code Video Series - Conductor Insulation [310.4] [ January 25^th 2021 ]
Separately Derived Systems, based on the 2020 NEC [ January 20^th 2021 ]
Code Video Series - Multiwire Branch Circuit [210.4] [ January 18^th 2021 ]
Code Video Series - Bonding, Metal Raceways [250.97] [ January 11^th 2021 ]
Code Video Series - Marina and Boat Dock Leakage Current Measurement Device [555.35(B)] [ January 5^th 2021 ]
Code Video Series - Electric Vehicle Power Transfer System, Scope [625.1] [ December 28^th 2020 ]
Code Video Series - Energy Storage Systems (ESS), Scope [706.1] [ December 14^th 2020 ]
Code Video Series - Arc-Flash Hazard Warning [110.16] [ December 2^nd 2020 ]
The Difference Between Bonding and Grounding - Part 1, based on the 2020 NEC [ November 27^th 2020 ]
Class 2 Circuit Requirements, based on the 2020 NEC [ October 28^th 2020 ]
Code Video Series - Overvoltage Protection, Article 242 [ October 19^th 2020 ]
Class 1 Circuit Requirements, based on the 2020 NEC [ September 28^th 2020 ]
GFCI Protection - 210.8, based on the 2020 NEC [ September 7^th 2020 ]
Fire Pump Systems, based on the 2020 NEC [ August 26^th 2020 ]
NEC Questions and Answers, based on the 2020 NEC - August 2020 [ August 13^th 2020 ]
Marinas and Boatyards, based on the 2020 NEC [ July 28^th 2020 ]
NEC Questions and Answers, based on the 2020 NEC - July 2020 [ July 15^th 2020 ]
A/C and Refrigeration Equipment, based on the 2020 NEC [ July 8^th 2020 ]
NEC Questions and Answers, based on the 2020 NEC - June 2020 [ June 16^th 2020 ]
NEC Questions and Answers, based on the 2020 NEC - May 2020 [ May 12^th 2020 ]
Flexible Cords and Flexible Cables, based on the 2020 NEC [ May 7^th 2020 ]
NEC Questions and Answers, based on the 2020 NEC - April 2020 [ April 16^th 2020 ]
Overvoltage Protection, based on the 2020 NEC [ April 8^th 2020 ]
NEC Questions and Answers, based on the 2020 NEC - March 2020 [ March 19^th 2020 ]
Load Calculations - Part 2, based on the 2020 NEC [ March 11^th 2020 ]
NEC Questions and Answers, based on the 2020 NEC - February 2020 [ February 20^th 2020 ]
Load Calculations - Part 1, based on the 2020 NEC [ February 12^th 2020 ]
NEC Questions and Answers, based on the 2017 NEC - January 2020 [ January 14^th 2020 ]
AFCIs and GFCIs [ January 8^th 2020 ]
NEC Questions and Answers, based on the 2017 NEC - December 2019 [ December 17^th 2019 ]
General Requirements, based on the 2020 NEC [ December 5^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - November 2019 [ November 14^th 2019 ]
Transformer Calculations [ November 6^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - October 2019 [ October 10^th 2019 ]
Understanding the NEC Series #7 - Sizing Equipment Grounding Conductor [ September 23^rd 2019 ]
NEC Questions and Answers, based on the 2017 NEC - September 2019 [ September 19^th 2019 ]
Solar Photovoltaic Systems, based on 2017 NEC - Part 2 [ September 12^th 2019 ]
Understanding the NEC Series #6 - Sizing Conductors 4 AWG and Larger [ August 19^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - August 2019 [ August 15^th 2019 ]
Solar Photovoltaic Systems, based on 2017 NEC - Part 1 [ August 8^th 2019 ]
Understanding the NEC Series #5 - Grounding and Bonding of Switches [ July 22^nd 2019 ]
NEC Questions and Answers, based on the 2017 NEC - July 2019 [ July 18^th 2019 ]
Motor Calculations based on the 2017 NEC - Part 2 [ July 9^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - June 2019 [ June 20^th 2019 ]
Understanding the NEC Series #4 - Feeder Conductor Sizing [ June 17^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - May 2019 [ May 22^nd 2019 ]
Understanding the NEC Series #3 - Swimming Pool Bonding [ May 20^th 2019 ]
Conductor Sizing, based on 2017 NEC - Part 2 [ May 8^th 2019 ]
Understanding the NEC Series #2 - How to Use the NEC [ April 23^rd 2019 ]
NEC Questions and Answers, based on the 2017 NEC - April 2019 [ April 18^th 2019 ]
Conductor Sizing, based on 2017 NEC - Part 1 [ April 10^th 2019 ]
Understanding the NEC Series #1 - 90.1 Purpose of the NEC [ March 25^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - March 2019 [ March 14^th 2019 ]
Sizing Junction Boxes and Pull Boxes, based on the 2017 NEC [ March 6^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - February 2019 [ February 14^th 2019 ]
NEC Requirements for Sizing Outlet Boxes, based on 2017 NEC [ February 6^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - January 2019 [ January 15^th 2019 ]
Services, based on the 2017 NEC - Part 2 [ January 8^th 2019 ]
NEC Questions and Answers, based on the 2017 NEC - December 2018 [ December 12^th 2018 ]
Services, based on the 2017 NEC - Part 1 [ December 6^th 2018 ]
Radio and TV Equipment and Coaxial Cables, based on the 2017 NEC [ November 19^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - November 2018 [ November 14^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - October 2018 [ October 18^th 2018 ]
NEC Questions, based on the 2017 NEC - October 2018 [ October 17^th 2018 ]
Fire Alarm Systems, based on the 2017 NEC [ October 9^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - September 2018 [ September 26^th 2018 ]
Interconnected Electric Power Production Sources, based on the 2017 NEC [ September 20^th 2018 ]
Evaluation of Electrical Feeder and Branch Circuit Loading: Phase 1 [ September 13^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - August 2018 [ August 15^th 2018 ]
Standby Power Systems, based on the 2017 NEC [ August 9^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - July 2018 [ July 25^th 2018 ]
NEC Questions, based on the 2017 NEC - July 2018 [ July 24^th 2018 ]
Free Resource - 2017 NEC Index [ June 28^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - June 2018 [ June 20^th 2018 ]
NEC Questions, based on the 2017 NEC - June 2017 [ June 19^th 2018 ]
Understanding Requirements for Electric Signs and Outline Lighting [ June 12^th 2018 ]
Understanding Requirements for Commercial Garages and Fuel based on the 2017 NEC [ May 31^st 2018 ]
NEC Questions and Answers, based on the 2017 NEC - May 2018 [ May 16^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - April 2018, Part 2 [ May 1^st 2018 ]
Understanding Requirements for Hazardous Locations, based on the 2017 NEC [ April 24^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - April 2018 [ April 11^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - March 2018 [ March 8^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - February 2018 Part 2 [ February 27^th 2018 ]
Understanding Requirements for Generators, based on the 2017 NEC [ February 22^nd 2018 ]
NEC Questions and Answers, based on the 2017 NEC - February 2018 [ February 14^th 2018 ]
Understanding Requirements for Appliances - Article 422, based on 2017 NEC [ January 31^st 2018 ]
NEC Questions and Answers, based on the 2017 NEC - January 2018 [ January 10^th 2018 ]
NEC Questions and Answers, based on the 2017 NEC - December 2017 [ December 12^th 2017 ]
Understanding Raceways [ December 7^th 2017 ]
Do you know one type of cable from another [ November 29^th 2017 ]
NEC Questions and Answers, Based on the 2017 NEC - October 2017 [ October 25^th 2017 ]
Article 680 - Permanently Installed Swimming Pools, based on the 2017 NEC - Part II of II [ October 18^th 2017 ]
2020 NEC [ October 9^th 2017 ]
NEC Questions and Answers, Based on the 2017 NEC - September 2017 [ September 27^th 2017 ]
Article 680 - Permanently Installed Swimming Pools, based on the 2017 NEC. Part I of II [ September 19^th 2017 ]
NEC Questions and Answers, Based on the 2017 NEC - August 2017 [ August 30^th 2017 ]
Article 590 - Temporary Installations, based on the 2017 NEC [ August 22^nd 2017 ]
NEC Questions and Answers, Based on the 2017 NEC - July 2017 [ July 28^th 2017 ]
Article 555 - Marinas, Boatyards, and Docking Facilities, based on the 2017 NEC [ July 20^th 2017 ]
NEC Questions and Answers, Based on the 2017 NEC - June 2017 [ June 25^th 2017 ]
Article 517 - Health Care Facilities, based on the 2017 NEC [ June 14^th 2017 ]
NEC Questions and Answers, Based on the 2017 NEC - May 2017 [ May 31^st 2017 ]
Article 404 - Switches and Receptacles, based on the 2017 NEC [ May 17^th 2017 ]
Article 310 - Conductors for General Wiring, based on the 2017 NEC [ April 25^th 2017 ]
NEC Questions & Answers, based on 2017 NEC - April 2017 [ April 13^th 2017 ]
NEC Questions & Answers, based on 2017 NEC - March 2017 [ March 22^nd 2017 ]
Article 250 - Grounding and Bonding, based on the 2017 NEC - Part 1 of 2 [ February 28^th 2017 ]
NEC Questions & Answers, based on 2017 NEC - February 2017 [ February 23^rd 2017 ]
NEC Questions & Answers, based on 2017 NEC - January 2017 [ January 19^th 2017 ]
NEC Questions & Answers, based on 2017 NEC - December 2016 [ December 14^th 2016 ]
Article 210 - Receptacles in Dwellings, based on the 2017 NEC [ December 8^th 2016 ]
Class 2 and 3 Circuits - Article 725 based on the 2014 NEC [ August 30^th 2016 ]
NEC Questions and Answers - August 2016 [ August 24^th 2016 ]
NEC Questions and Answers - July 2016 [ July 20^th 2016 ]
Class 1 Circuits - Article 725 based on the 2014 NEC [ June 28^th 2016 ]
NEC Questions and Answers - June 2016 [ June 22^nd 2016 ]
Fire Pumps - Article 695 based on the 2014 NEC [ April 26^th 2016 ]
NEC Questions and Answers - April 2016 [ April 13^th 2016 ]
NEC Questions and Answers - March 2016 [ March 30^th 2016 ]
Solar Photovoltaic Systems Part 3 - Article 690 based on the 2014 NEC [ March 24^th 2016 ]
Free Mike Holt Publication - Swimming Pools, Spas, Hot Tubs, based on the 2014 NEC [ March 10^th 2016 ]
NEC Questions and Answers, based on the 2014 NEC - February 2016 [ February 24^th 2016 ]
Free Mike Holt Publication - Solar PV Identification Requirements, based on the 2014 NEC [ February 18^th 2016 ]
Solar Photovoltaic Systems Part 2 - Article 690 based on the 2014 NEC [ February 16^th 2016 ]
NEC Questions and Answers, based on the 2014 NEC - January 2016 [ January 27^th 2016 ]
Solar Photovoltaic Systems Part 1 - Article 690 based on the 2014 NEC [ January 12^th 2016 ]
Air-Conditioning and Refrigeration Equipment, based on the 2014 NEC [ December 15^th 2015 ]
NEC Questions and Answers, based on the 2014 NEC - November 2015 [ November 20^th 2015 ]
Fixed Electric Space-Heating Equipment - based on the 2014 NEC [ November 12^th 2015 ]
NEC Questions and Answers - October 2015 - based on 2014 NEC [ October 19^th 2015 ]
Free Mike Holt Publication - Radio and Television Equipment - 2014 NEC [ October 13^th 2015 ]
From the Desk of Mike Holt - NEC Conductors and protection for air-conditioning equipment [ October 10^th 2015 ]
Switchboards, Switchgear, and Panelboards - Based on the 2014 NEC [ October 7^th 2015 ]
Free Mike Holt Publication - Marinas and Boatyards, Article 555 - 2014 NEC [ September 24^th 2015 ]
GFCIs and AFCIs - Based on the 2014 NEC [ September 10^th 2015 ]
New UL GFCI Standard [ August 26^th 2015 ]
Flexible Cords - Based on the 2014 NEC [ August 7^th 2015 ]
Attention NEC Book Collectors! [ July 28^th 2015 ]
NEC Questions and Answers - July 2015 - Based on the 2014 NEC [ July 22^nd 2015 ]
Transformer Calculations - Based on the 2014 NEC [ July 14^th 2015 ]
2017 NEC Changes - Top 16 [ July 8^th 2015 ]
Commercial Load Calculations, Part 2 - Based on the 2014 NEC [ June 17^th 2015 ]
Free Mike Holt Publication - Fire Alarm Systems, Article 760 - 2014 NEC [ May 28^th 2015 ]
NEC Questions and Answers - May 2015 - Based on the 2014 NEC [ May 25^th 2015 ]
Commercial Load Calculations, Part 1 - Based on the 2014 NEC [ May 8^th 2015 ]
Multifamily Dwelling Unit Load Calculations - Based on the 2014 NEC [ April 20^th 2015 ]
NEC Questions and Answers - April 2015 - Based on the 2014 NEC [ April 14^th 2015 ]
NEC Charts Compiled Over Years of Research [ March 27^th 2015 ]
One-Family Dwelling Unit Load Calculations - Based on the 2014 NEC [ March 20^th 2015 ]
Free Resource - 2014 NEC Index [ March 12^th 2015 ]
NEC Questions and Answers - March 2015 - Based on the 2014 NEC [ March 6^th 2015 ]
Motor Calculations, Part 2 - Based on the 2014 NEC [ February 9^th 2015 ]
NEC Questions and Answers - January 2014 - Based on the 2014 NEC [ January 16^th 2015 ]
Motor Calculations, Part 1 - based on the 2014 NEC [ January 5^th 2015 ]
NEC Questions and Answers - December 2014 - Based on the 2014 NEC [ December 29^th 2014 ]
Conductor Sizing, Part 2 - based on the 2014 NEC [ December 12^th 2014 ]
Conductor Sizing, Part 1 - based on the 2014 NEC [ November 17^th 2014 ]
2014 NEC Questions and Answers - November 2014 [ November 14^th 2014 ]
Box Sizing — based on the 2014 NEC® [ October 13^th 2014 ]
Section 680.26 Equipotential Bonding [ October 10^th 2014 ]
Raceway Sizing — based on the 2014 NEC® [ September 11^th 2014 ]
Article 400 — Flexible Cords and Flexible Cables, based on the 2014 NEC® [ August 28^th 2014 ]
Health Care Facilities — Article 517, based on the 2014 NEC [ August 18^th 2014 ]
Transformers — Article 450, based on the 2014 NEC® [ July 16^th 2014 ]
Switches, Receptacles, Cord Connectors, and Caps - Based on the 2014 NEC [ June 27^th 2014 ]
Articles 310, 312, 314 - The Four Pillars of Chapter Three, based on the 2014 NEC [ June 16^th 2014 ]
Article 300 - Branch-Circuit, Feeder, and Service Calculations [ May 29^th 2014 ]
Article 250 - Grounding and Bonding Part 2, Based on the 2014 NEC [ May 7^th 2014 ]
Article 250 - Grounding and Bonding Part 1, Based on the 2014 NEC [ April 15^th 2014 ]
Article 230 - Services, based on the 2014 NEC [ March 18^th 2014 ]
Article 210 - Branch Circuits, based on the 2014 NEC® [ February 18^th 2014 ]
2014 NEC Questions and Answers - January 2014 [ January 22^nd 2014 ]
Article 110 - Requirements for Electrical Installations - Based on the 2014 NEC [ January 14^th 2014 ]

[ View More NEC on Our Technical Page ]

From what I have observed in my 35 year young life is that Mike Holt wants to teach you to be an electrician and has available information to do so, not just to get you to pass licensing tests.
D. Steele