Top Electrical & Network Code Changes in Maryland & Virginia in 2025: What You Should Know

Maryland: Key Code Updates for 2025

1. Maryland Adopts the 2023 National Electrical Code (NEC)

Maryland officially adopts NEC 2023 effective March 1, 2025.
This code cycle introduces several important requirements affecting both electrical and low-voltage/network installations, especially during renovations or panel upgrades.

Key points homeowners should know:

• Stricter surge protection requirements

• Expanded AFCI and GFCI protection

• Updated rules for service equipment, grounding, and bonding

• Higher standards for new electrical circuits added during remodels

For homes in areas like Bethesda, Chevy Chase, and Potomac, this matters because many properties still rely on older service panels and wiring systems. Any upgrades or new installations now must follow NEC 2023.

2. Stronger Surge & Fault Protection Requirements

NEC 2023 increases requirements for:

• SPDs (Surge Protective Devices)

• AFCIs (Arc-Fault Circuit Interrupters)

• GFCIs (Ground-Fault Circuit Interrupters)

With more homeowners using sensitive electronics, server racks, and smart systems, surge protection is no longer optional — it’s required for most service upgrades or replacements.

3. Network & Low-Voltage Wiring Improvements

While low-voltage wiring isn’t fully governed by the main NEC, many electrical upgrades automatically trigger requirements for:

• Proper grounding and bonding for network closets

• Labeling and accessibility standards

• Dedicated circuitry for smart hubs or server equipment

• Improved support for PoE (Power over Ethernet) systems

This means that if you’re upgrading panels or rewiring your home, your network infrastructure also needs to meet modern safety and installation standards.

Virginia: Key Code Updates for 2025

1. Mandatory Use of 2021 Uniform Statewide Building Code (USBC)

Starting January 18, 2025, all new permits in Virginia must follow the 2021 USBC, which references the 2020 National Electrical Code (NEC-2020).

If you plan to remodel, expand, or upgrade electrical service in Northern Virginia, these rules will apply to your project.

2. Key Electrical Changes in the 2020 NEC (Adopted in VA)

Outdoor Emergency Disconnects

All new dwellings must include an exterior emergency disconnect, improving first-responder safety.

Whole-Home Surge Protection

Any new or replaced service panel must include a Type 1 or Type 2 surge protector to protect the entire home.

Expanded AFCI/GFCI Coverage

More rooms and receptacle types now require arc-fault and ground-fault protection, including:

• Unfinished basements

• Updated kitchen spacing rules

• Outdoor circuits

• Specific appliance circuits

Dedicated Circuits for High-Load Equipment

Homes with EV chargers, large HVAC systems, network racks, or home offices may require additional dedicated circuits for compliance.

3. Remodel & Upgrade Implications

For homeowners planning renovations in Northern Virginia:

• Code compliance may require upgraded breakers or new circuits

• Electrical panel replacements must follow stricter standards

• Network closets may require labeling, grounding, and surge protection

• Older homes may need major updates to pass inspections

What This Means for Homeowners in the DMV

Plan Ahead for Renovations

Both Maryland and Virginia now follow more demanding code requirements.
If your home is older — which is common in Bethesda, Chevy Chase, Potomac, Arlington, and Alexandria — upgrades may be required before new installations are approved.

Electrical Panel & Network Systems Must Work Together

With growing demand from:

• Smart home devices

• Home offices

• EV chargers

• Network servers & Wi-Fi systems

• Backup power setups

…it’s now crucial to ensure that both electrical and network systems meet 2025 standards.

Budget for Modern Compliance

Electrical work has become more complex due to:

• Required surge protection

• Exterior disconnect mandates

• Stricter wiring requirements

• Higher-capacity circuits

This is important to communicate with homeowners before beginning any project.

Safer, Cleaner Installations

The new codes emphasize:

• Better grounding

• Reliable surge protection

• Improved labeling

• Safer access to panels and disconnects

• Reduced fire and electrocution risks

These changes make homes safer and modern-ready.

Quick Reference Table

StateUpdated CodeEffective in 2025Key ChangesMarylandNEC 2023March 1, 2025Surge protection, expanded AFCI/GFCI, grounding updates, network room complianceVirginiaUSBC 2021 referencing NEC 2020New permits after Jan 18, 2025Outdoor disconnects, SPDs required, expanded protection, remodel requirements

Need Help Navigating 2025 Electrical & Network Codes?

We provide code-compliant electrical and network upgrades across the DMV area, ensuring your home or business meets all Maryland and Virginia’s 2025 regulations.

Whether you’re planning:

• An electrical panel upgrade

• A remodel

• Network/IT room updates

• EV charger installation

• Smart home expansion

• Backup power integration

…we make sure your project passes inspection and is ready for the future.

Contact us to schedule a code compliance assessment or ask questions about upgrades in your area.