Description
NFPA 70: National Electrical Code (NEC), 2020 Edition
NFPA 70 2020 edition is the National Electrical Code, the document that governs electrical design, installation and inspection across the United States. Electricians, contractors, electrical engineers and safety inspectors use it to check that wiring work meets code.
The 2020 edition expands protection requirements for modern residential and commercial settings and adds new articles for technologies not covered before.
This listing is the 2020 edition. NFPA now lists a 2026 edition of NFPA 70, so check which year your jurisdiction, contract or exam cites before you order.
Exterior emergency disconnects
New requirements apply to one- and two-family dwellings, giving first responders a way to disconnect power from outside the building during an emergency.
Expanded GFCI and surge protection
Ground Fault Circuit Interrupter (GFCI) protection now extends to non-dwelling unit locations and 250-volt receptacles. Surge protection devices (SPDs) are now mandatory for dwelling units.
What is new in the 2020 edition
- Four new articles, including Overvoltage Protection (Article 242), Medium Voltage Conductors and Cable (Article 311) and Ethernet Cables (Article 800).
- Article 310 is reorganized to make ampacity tables and conductor requirements easier to find.
Book details
- Title: NFPA 70: National Electrical Code (NEC)
- Edition: 2020
- Publisher: National Fire Protection Association (NFPA)
- ISBN-13: 9781455928620
- Format: Paperback
- Genre: Electrical Code & Standards
Questions buyers ask
Who uses the National Electrical Code?
Electricians, contractors, electrical engineers and safety inspectors who need their work to meet current wiring code, plus students studying for the master electrician exam.
What changed in the 2020 edition?
Exterior emergency disconnects for one- and two-family dwellings, expanded GFCI protection, mandatory surge protection for dwelling units, four new articles, and a reorganized Article 310.
What is an exterior emergency disconnect?
A new requirement for one- and two-family dwellings that lets first responders disconnect power from outside the building during an emergency.
Does this edition require surge protection?
Yes. Surge protection devices are now mandatory for dwelling units to protect sensitive electronics and appliances.
What format does it ship in?
Paperback, published by the National Fire Protection Association (NFPA), ISBN 9781455928620.
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