Code Articles

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
The most important Article is 100. I would follow that by 240 and 250. However, the most important ones, other than 100, are the ones that apply to the installation you are doing.
 

jaggedben

Senior Member
Location
Northern California
Occupation
Solar and Energy Storage Installer
You pretty much start at the beginning of the book. It's arranged from the most general to the more specialized.

If I had to pick an essential top 10, then in a pretty rough order:
90
100
110
250
310
240
230
210
215
300

Here are the two I wish residential electricians in my area knew better.
220
705
 

CoolWill

Senior Member
Location
Alabama
Occupation
Electrical Contractor
90.1 Purpose

(A) Practical Safeguarding
The purpose of this Code is the practical safeguarding of persons and property from hazards arising from the use of electricity. This Code is not intended as a design specification or an instruction manual for untrained persons.
The NEC itself doesn't adhere to that article in some cases.
 

JoeStillman

Senior Member
Location
West Chester, PA
I always recommend memorizing the 75°C column of table 310.15. It helps to be able to spot at a glance any mismatch between wires and breakers. Just copy it down on a piece of paper. Fill up the page with copies of that one column. Then throw it away and do it again.
 
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