Checked against primary sources 2026-09-04

Where Michigan differs

Michigan Part 8 Electrical Code Amendments: What Differs

Part 8 adopts the National Electrical Code and then changes it. Most of the change is administrative, and four amendments are technical enough to decide an answer on the exam or a callback on the job. Here is each one, by rule number, with the code section it touches.

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How Part 8 works

The rule set runs R 408.30801 through R 408.30880 on the state's administrative rules system. R 408.30801 adopts the National Electrical Code 2023 second printing by reference, and the rules after it add to, amend or rescind pieces of it.

R 408.30807 amends the code's title section and designates these rules as the Michigan Electrical Code. So the Michigan code is the national code plus this rule set, and reading one without the other gives you the wrong answer in a few specific places.

A lot of the rule numbers in the set are marked rescinded. Michigan keeps the numbering and empties out rules it no longer uses rather than renumbering everything behind them, which is why the set reads as a list with gaps in it.

The administrative front of the book, replaced

R 408.30801 excludes ten sections from the code as adopted: 80.2, 80.5, 80.15, 80.23, 80.27, 80.29, 80.31, 80.33, 80.35 and 90.6. Those are administration and enforcement, and Michigan writes its own in their place.

What goes back in, rule by rule:

• R 408.30808 amends 80.1 and sets the scope, covering inspections, plan reviews, design and the electrical controls for special events.
• R 408.30810 adds 80.13 and defines the authority having jurisdiction, including the power to order equipment disconnected where it is dangerous.
• R 408.30811 adds 80.14 and gives the code official the duty to enforce the provisions and to adopt policies that clarify them.
• R 408.30815 adds 80.18 and puts the duty to maintain the electrical system in good repair on the property owner.
• R 408.30818 adds 80.19 for permits, including a 180 day expiration and the procedure for notifying the inspector.
• R 408.30819 adds 80.21 and its subsections for plans and specifications, required where a system exceeds 400 amperes at 1,000 volts or less in a building over 3,500 square feet.
• R 408.30820 adds 80.20 and reserves the right to require the permit holder's representative on site during an inspection.
• R 408.30823 amends 80.25 and bars connection to electricity without a permit, with a narrow route for a utility emergency reconnection where a permit is filed the next day.
• R 408.30827 adds 80.26 and requires the enforcing agency's approval before service equipment on the load side of the meter is energized.

If you learned the code somewhere else, this is the part that will not match. The administrative sections at the front of your book are not the administration that applies in Michigan.

The four technical amendments

Emergency and standby systems, R 408.30838

Amends 700.9 and 701.9 to require compliance with NFPA 110 and NFPA 111, in the 2019 editions R 408.30801 adopts. So the installation requirements for emergency and legally required standby systems reach outside the code book.

The dwelling emergency disconnect, R 408.30870

Adds 230.85 and requires an outdoor emergency disconnecting means at one and two family dwellings, with specific marking.

One thing worth knowing if you own a 2026 book. We searched the 2026 text on 4 September 2026 and it has no section numbered 230.85, with Article 230 running from 230.82 to 230.90. The requirement did not disappear, it changed address: the 2026 edition carries the emergency disconnect for one and two family dwelling units at 225.41. That is a reason to read this rule closely when the 2026 draft files, and a reason to work from the 2023 book while it is the adopted one.

Gas piping and corrugated stainless steel tubing, R 408.30871

Amends 250.104(B) and requires gas piping systems, including listed corrugated stainless steel tubing, to be bonded to the electrical service grounding electrode system.

This is the Michigan amendment most likely to turn up as an exam item, because 250.104(B) in the plain code and 250.104(B) in Michigan do not say the same thing.

Type NM and NMC cable, R 408.30873

Amends 334.10 and 334.12(A), the permitted and prohibited uses of nonmetallic sheathed cable, and sets thermal barrier conditions on where it may run.

Uses of NM cable is a question with a different answer in Michigan than in the plain book, which is exactly why the rules are on the reference list you carry in.

What the open draft would change

Draft rule set 2026-17 LR, dated 19 August 2026, keeps the same structure and moves the adoption to the 2026 National Electrical Code second printing with technical interim amendments 70-26-1 through 70-26-8. NFPA 110 and NFPA 111 move to their 2025 editions.

Three of the four technical amendments change with it. R 408.30870 carries a requirement for a readily accessible disconnecting means on or within 6 feet of air conditioning or refrigerating equipment at a one or two family dwelling, marked as an emergency disconnect and service disconnect. R 408.30871 requires a bonding jumper of not less than 6 AWG copper. R 408.30873 permits type NM and NMC cable in multifamily dwellings and their detached garages, and restricts it in structures more than one floor above grade unless it is concealed behind a 15 minute fire rated finish.

R 408.30838 would also add rules on where emergency and standby equipment may be installed and on the placement of surge protective devices.

None of it is in force. The draft rule page covers the timing and how to follow it.

Why this is on the exam

The Michigan Electrical Code Rules Part 8 are on PSI's reference list, and every content outline names the electrical code rules as something the paper tests.

They are free to download and free to print, and PSI lets you carry them in provided each document is stapled three times down the left edge and carries no marks of any type.

Most candidates never open them. That is a straightforward place to pick up items, because the questions that turn on a Michigan amendment cannot be answered from the code book alone.

Questions people ask

What are the Michigan Part 8 electrical code amendments?

They are the rules R 408.30801 through R 408.30880 that adopt the National Electrical Code for Michigan and then change it. Most of the change is administrative, and four are technical: emergency and standby systems, the dwelling emergency disconnect, gas piping and corrugated stainless steel tubing bonding, and type NM cable.

Does Michigan require CSST to be bonded?

Yes. R 408.30871 amends 250.104(B) and requires gas piping systems, including listed corrugated stainless steel tubing, to be bonded to the electrical service grounding electrode system. The open 2026 draft adds a bonding jumper of not less than 6 AWG copper.

Does Michigan change the NM cable rules?

Yes. R 408.30873 amends 334.10 and 334.12(A), the permitted and prohibited uses of nonmetallic sheathed cable, with thermal barrier conditions. The open draft would permit it in multifamily dwellings and detached garages, and restrict it more than one floor above grade unless concealed behind a 15 minute fire rated finish.

Why does Michigan exclude parts of Article 80 from the code?

Because it writes its own administration. R 408.30801 excludes 80.2, 80.5, 80.15, 80.23, 80.27, 80.29, 80.31, 80.33, 80.35 and 90.6, and the rules that follow put back scope, authority, code official duties, maintenance, permits, plan review, on site representation, connection to electricity and service equipment approval.

How long is a Michigan electrical permit valid?

R 408.30818 sets a 180 day expiration for a permit, and the open draft describes a possible 180 day extension. The same rule carries the notification procedure for inspections.

When does a Michigan electrical job need plans submitted?

R 408.30819 requires plans and specifications where the system exceeds 400 amperes at 1,000 volts or less and the building floor area is over 3,500 square feet. The open draft adds provisions on plan revisions and construction documents.

Are the Part 8 rules tested on the Michigan electrician exam?

Yes. They are on PSI's reference list alongside the code book, 2016 PA 407 and 1972 PA 230, and every content outline names the electrical code rules. You may carry them in if each document is bound with three staples down the left edge and carries no marks.

What this page cites

• Michigan Electrical Code Rules Part 8, R 408.30801 to R 408.30880 The rule set that adopts the National Electrical Code for Michigan and amends it. Read 4 September 2026 on the Michigan administrative rules site. source
• Draft rule set 2026-17 LR, Part 8 Electrical Code The strike and bold draft dated 19 August 2026 that would move Michigan to the 2026 National Electrical Code. Not filed as of 4 September 2026. source
• PSI candidate information bulletin, Michigan Bureau of Construction Codes Effective 20 August 2026, read 4 September 2026. Source for every item count, time limit, the 75 percent standard, the $100 fee, the reference list, the book and conduct rules, the attempt limit, the score report and the test center list. source
• Michigan administrative rules, Bureau of Construction Codes code sets The index that holds every current Bureau of Construction Codes rule set, including Part 8. Read 4 September 2026. source