200A Subpanel Installation & Breaker Upgrades in York, SC

Touchstone Electric’s Charlotte team, operating out of our Matthews branch, completed a permitted subpanel installation for John Fralic in York, SC on January 14, 2025. This project expanded available circuit capacity and provided a clean, code-focused pathway for present and future electrical needs.

For this home, we installed a 200A-rated indoor subpanel and fed it with a dedicated 100A feeder. This approach delivers robust headroom for circuits while maintaining protection and balance from the main service.

What We Installed

200A-rated indoor subpanel (permitted and inspected)
100A two-pole breaker at the main panel to feed the new subpanel
Approx. 15 ft of SER #2 (4-wire) Service Entrance Cable from the main panel to the subpanel
Nineteen (19) 20A standard breakers to support general small-appliance and branch circuits
Four (4) 20A tandem breakers to add circuit capacity where panel space is limited
One (1) 30A double‑pole breaker to support typical 240V equipment needs

Together, these upgrades provide organized circuit expansion, improved distribution, and flexibility for new devices and future renovations—ideal for homes needing more circuits without replacing the main service.

Safe, Code‑Conscious Power Expansion

Our Panels & Service Upgrades work emphasizes safety, clarity, and code compliance. The 4‑wire feeder to the subpanel supports modern best practices for subpanel installations in accordance with current electrical codes. By dedicating a 100A feeder to a 200A‑rated enclosure, homeowners gain durable capacity for multiple circuits while maintaining appropriate overcurrent protection.

As part of our process, permits and inspections are coordinated through the local authority having jurisdiction. For transparency, our standard subpanel line item includes permitting, while components such as feeders, trenching, breakers, surge protection, or separate grounding for detached structures are specified as separate items when needed—just as they were for this project.

NEC 2020 and AFCI Expectations

Inspectors are increasingly implementing NEC 2020 requirements, which may call for upgrading certain branch circuits to AFCI breakers. Installing AFCI protection can sometimes reveal preexisting wiring conditions—such as shared neutrals—that may cause immediate tripping. In those cases, diagnosing and correcting the issue can involve tracing circuits and may require additional time to locate and resolve the shared neutral or other underlying issues. Our team communicates these possibilities up front so you know what to expect.

Your York, SC Electricians — From Our Matthews/Charlotte Branch

Lead technician Josh Key performed this Subpanel Installation under our Charlotte business unit. We’re proud to support homeowners throughout York, SC with dependable subpanel work, breaker upgrades, and service improvements that keep homes safe and powered for modern living.

Local, permitted subpanel installations
Clear scope and component-by-component documentation
Attention to current code requirements and inspection readiness

Customer Feedback

We appreciate the opportunity to serve John Fralic in York, SC. The customer praised our work with a review. You can view it here: Read the Google review.

Planning a Subpanel or Breaker Upgrade in York, SC?

If you’re adding circuits, remodeling, or preparing for new 240V equipment, a professionally installed subpanel can be the right solution. Touchstone Electric’s Matthews/Charlotte team delivers permitted, code‑focused Subpanel Installation and Panels & Service Upgrades throughout York, SC. Contact us to discuss your project and we’ll help you choose the right feeder size, breaker layout, and future‑ready capacity for your home.