Key takeaways:

• New Jersey, New York, and Pennsylvania use different versions of the National Electrical Code (NEC).
• It’s important to make sure your home or place of business is up to code, but you can go further and adopt safety measures from the 2023 version of the NEC.
• A local electrician can help you navigate NEC requirements for your state and recommend further upgrades.

The National Electrical Code is the go-to reference for electricians. It’s a comprehensive document outlining how to install and upgrade electrical systems for safety and efficiency.

The code is upgraded every three years, but not all states use the latest version. Here’s what you need to know about electrical code compliance in NY, NJ, and PA, and NEC 2023 code updates.

Which NEC Version Applies to You? State-by-State Adoption

New York, New Jersey, and Pennsylvania use different versions of the NEC:

• New York and Pennsylvania have adopted the 2020 edition of the NEC. New York is transitioning to the 2023 edition, starting in December 2025, while Pennsylvania recently switched to the 2020 edition this summer.
• New Jersey still uses the 2017 version of the NEC.

Local building departments in NJ, NY, and PA may have stricter rules that aren’t mentioned in the NEC. These added requirements can sometimes be more up-to-date than older versions of the NEC.

Are the 2017 or 2020 Versions of the NEC Enough?

The 2017 and 2020 versions of the National Electrical Code (NEC) are somewhat outdated. The NEC has published a 2023 version and is currently working on a 2026 update.

Homes that follow the 2017 or 2020 requirements might not meet growing power demands, especially for systems like electric vehicle chargers, solar panels, battery storage or high-powered appliances like induction ranges or heat pumps.

These earlier versions of the NEC also lack requirements for multiple high-draw devices to run simultaneously, which risks overloading traditional household wiring and panels that follow older standards. As a result, homes wired solely to the 2017 or 2020 NEC might lack sufficient safety, capacity, and flexibility for current and future power use.

Local Building Codes Considerations

Homeowners and contractors should always call their building department before starting an electrical upgrade or addition. Here’s why this matters in the tri-state area:

• Many local building codes incorporate parts of NEC 2023, even if your state hasn’t officially adopted the full code yet.
• Areas with older homes (common in NJ and PA) often update their requirements to protect against fires, overloaded circuits, and weather-related outages.

Regardless of the version of the NEC in effect in your state, you need to meet your local building code requirements or face fines.

Why You Should Consider Additional NEC 2023 Code Updates Ahead of the Winter

Most families use more power in winter for heating, lights, and electronics. That increased load means upgrades or repairs put off during warmer months can become urgent problems. Even if your state hasn’t adopted the NEC yet, several changes in this edition make sense to consider now:

• Wider use of GFCIs and AFCIs. The new code calls for greater protection against electrocution and fire, especially in kitchens, bathrooms, and outdoor areas.
• Surge protection for the whole electrical panel. The 2023 version of the NEC requires surge protection for new service panels in many cases, helping protect all appliances and sensitive electronics.
• Dedicated rules for renewable energy and EV chargers. If you plan to install solar, battery storage, or a car charging station, the 2023 code offers up-to-date advice.
• Stricter rules for outdoor, pool, and spa wiring. Homes with pools or hot tubs see major updates that help prevent shocks and accidents.

A licensed electrician in NY, NJ, or PA can evaluate your current wiring and electrical panel and suggest cost-effective upgrades that satisfy legal requirements and make your home safer.

Looking Ahead: Upgrading for Safety and Peace of Mind

Homeowners often wait until local or state inspectors force them to upgrade, but planning ahead brings real benefits:

• New York will officially adopt the 2023 version of the NEC at the end of the year. After this date, all projects must meet the 2023 requirements to qualify for a permit.
• This means simple electrical or building upgrades might need to include additional electrical updates to meet these new requirements.
• The 2020 NEC recently went into effect in PA, which means your next home improvement project could require additional electrical work.
• New Jersey and Pennsylvania will eventually adopt the 2023 NEC. If you update your electrical system now, you won’t have to scramble to make expensive changes on short notice later.
• Upgrading panels, wiring, and circuit protection now will improve reliability all winter and prepare your home for the future.
• Meeting or exceeding NEC 2023 requirements can improve resale value and make your property more attractive to buyers and insurers.

Licensed Electricians: Your Best Ally

Most upgrades require skill and knowledge of state and local regulations. A professional electrician stays up to date on all relevant codes, including city and township requirements. They can spot issues in older homes, recommend practical improvements, and guide you through the permitting process.

A local expert acts as your partner, making sure everything, whether it’s a new 200 amp panel in NJ or updated kitchen wiring in PA, passes inspection the first time.

Update Your Electrical System With JAXSL

At JAXSL, we help homeowners in New Jersey, New York, and Pennsylvania navigate NEC rules and local codes. Our skilled team of electricians reviews your electrical system, suggests upgrades, and handles all permits and inspections. From replacing old electrical panels to upgrading your home with solar panels, we offer a wide range of electrical services for all your needs.

Contact us today at 844-452-9538 for an assessment and find out how we can help keep your home safe and ready for the future.

FAQ

When is New York adopting the 2023 NEC?

New York is adopting the 2023 version of the National Electrical Code in December 2025. After that, all projects must meet these new requirements to obtain a permit.

Which version of the NEC is in effect in New Jersey?

New Jersey still uses the 2017 version of the NEC, but exceeding this standard is a great investment to make your home safer.

Which version of the NEC does Pennsylvania use?

Pennsylvania switched to the 2020 version of the NEC in July 2025. Many homes still need upgrades to meet these updated requirements.

What do I need to comply with the 2023 National Electrical Code?

Most homes need more GFCI outlets and a whole-home surge protection device added to their panel. A licensed electrician can inspect your home and give you a list of recommended upgrades to meet the 2023 NEC standard.

Can I do electrical upgrades myself?

For many improvements (new circuits, panel upgrades, EV chargers), you must use a licensed electrician. DIY work may not pass inspection and can void insurance or resale value.