Massachusetts Electrician Exam: How 527 CMR and the NEC Fit Together
Massachusetts doesn't use the NEC as printed. The state adopts the NEC with amendments in 527 CMR 12.00, and Massachusetts currently enforces the 2023 NEC as amended. Where the amendment differs from the national text, the amendment wins, on the job and on a state test.
How to study both
- Use the NEC edition your exam lists (confirm with the Massachusetts Board of State Examiners of Electricians).
- Get the 527 CMR 12.00 amendments.
- Mark every amended article in your code book with one dedicated tab color.
- On every lookup, check for a state amendment before you answer.
Common mistakes
- Studying from a national prep book and forgetting the amendments
- Bringing or studying the wrong edition
- Running out of time on lookups. Practice navigation, not memorization
From a Massachusetts contractor
Learn to Navigate the NEC was written by Tim Hodnicki, an electrical contractor in Easthampton, MA. The guide is built on the 2026 NEC, and its lookup method and marking system work in any edition. It includes a Massachusetts amendment marking system.
Learn to Navigate the NEC (2026 NEC edition, 28 pages, PDF). The lookup method, a crosswalk for moved articles, drills, marking system and Massachusetts notes. Written by Tim Hodnicki, Easthampton, MA electrical contractor.
Get the guide for $39 See what's inside
Get the guide for $39 See what's inside
More guides: How to navigate the NEC · 2026 NEC changes for exam takers · Massachusetts exam: 527 CMR and the NEC