Question 1

Why was 352.44(B) removed in the 2026 NEC?

Accepted Answer

The authoritative answer is the committee statement. Look up the First and Second Draft reports for the 2026 cycle on NFPA's site and search the Article 352 committee actions. A likely reason is that the general raceway expansion rule in 300.7 already covers the same ground for every raceway type, making a PVC-only copy redundant, but read the committee statement before relying on that.

Question 2

I installed a meter/main combo but kept the old 3-wire feeder to the house. Is that a problem?

Accepted Answer

Yes. You now have a neutral-to-ground bond in two places, so some normal neutral current rides back on the grounding path: equipment grounding conductors, metal water pipe, gas piping, CATV shields, anything bonded. If that neutral ever opens, those metal parts carry the full imbalance current. Run a 4-wire feeder and remove the bond in the downstream panel.

Question 3

Will 16 AWG on the new 10 A circuits catch on?

Accepted Answer

Right now it's mostly a paper allowance. The 2026 NEC allows 16 AWG copper for specific 10 A branch circuits, but you still need listed cable, a 10 A overcurrent device and AFCI/GFCI protection where required. Expect it first in prefab, modular and low-load LED lighting work. For the exam, know that it exists and know its limits, including no receptacles on it.

Question 4

Which NEC sections show up constantly on the journeyman exam?

Accepted Answer

Beyond the usual load calc, box fill, conduit fill and grounding sections, add 240.4(D), because people do the derating perfectly and then forget the small-conductor cap. Add Chapter 9 Table 8 for voltage drop and Chapter 9 Table 1 with Annex C for conduit fill. And tab the index. On an open-book exam, finding the answer in under a minute matters more than knowing it cold.

Question 5

Where do I start when the code book feels overwhelming?

Accepted Answer

Don't read it front to back. Learn how it's built first: Chapters 1 through 4 apply generally, 5 through 7 modify them, 8 stands alone and 9 is tables. Then do 20 practice questions a night and look up every one, even the ones you got right, using the index. After two weeks you'll know where things live, and that's what the test really grades.

Question 6

Is my inspector stuck on the 2020 NEC if the 2026 edition is out?

Accepted Answer

The AHJ enforces what is legally adopted. If you want to use a newer allowance, such as the lighter 2026 dwelling load calc, ask for it in writing under 90.4, and expect that using the new edition for one thing may mean using it for everything. The same goes for exams: you're tested on what your state adopted, not on what's newest.

Question 7

When will Massachusetts adopt the 2026 NEC rules, like the EV receptacle listing in 625.44?

Accepted Answer

Massachusetts amends the NEC through 527 CMR 12. Watch the Board of State Examiners of Electricians and the Division of Occupational Licensure for the effective date, and don't assume 2026 rules apply until it's published. Until then, ask your inspector before relying on anything new, and get any interpretation in writing.

Question 8

For a panel schedule, do I use 3 VA per square foot or actual fixture watts?

Accepted Answer

They're two different calculations. A branch-circuit panel schedule shows what's actually connected: fixture watts, plus 180 VA per general-use receptacle strap on non-dwelling work. The dwelling service or feeder calc uses the per-square-foot method, which in the 2026 NEC moved to Article 120 with a lower dwelling value. Adding up a panel schedule and calling it a service calc oversizes everything.

Question 9

How does the 2026 existing-dwelling optional calculation (120.83) work?

Accepted Answer

Treat 120.83 as its own method. Existing loads go into the first-block-at-100%, remainder-at-reduced-percentage bucket, including existing EV and HVAC (drop the smaller of heating or cooling). New EVSE and new resistance heat go in at the higher percentage the section assigns, and other new loads at the lower one. A new range or dryer counts as an 'other new' load. Write it out in a table for the inspector.

Question 10

I have a 100 A condo service and want to add a 30 A range. Why won't anyone do a load calc?

Accepted Answer

A good electrician should, and it takes about 15 minutes. For an existing home the NEC has an optional method meant for exactly this, and if the utility can give you 12 months of peak demand data, the Code allows using that too. With gas heat and hot water and no air conditioning, a 100 A service often handles a range and dryer. Ask the next bidder to put the calc in writing.

NEC Exam Questions Answered