Electrical Panel & Service Upgrades

An electrical panel is the one piece of equipment in your house that every single circuit depends on, and it is also the piece most likely to be forty years old. Across Sevier County and greater Knoxville, the typical home we walk into has a 100-amp service installed when the house was built and a load profile that has roughly doubled since. Central air replaced window units. Electric ranges and dryers became standard. Hot tubs went on decks. And now electric vehicles are showing up in driveways in real numbers.

The result is that panel and service work has become the most common upgrade we quote. Sometimes the panel is genuinely unsafe — Federal Pacific Stab-Lok and Zinsco equipment with documented failure-to-trip histories, or a fuse box that predates modern grounding practice. More often the panel is mechanically sound but simply out of capacity or out of physical slots, and the homeowner has been living with tripping breakers for years assuming that's just how the house is.

East Tennessee housing spans a century, and so does the equipment. In older Knoxville neighborhoods we still find genuine fuse boxes and 60-amp services. Homes updated between roughly 1960 and 1985 across the whole region frequently have Federal Pacific or Zinsco panels. Mid-century ranches typically have a 100-amp panel that is fine mechanically and completely full. Subdivisions built since the mid-1990s usually have 150- or 200-amp service, where the work is adding capacity rather than replacing the service.

Cabins and rural properties add their own set of issues: long service runs with measurable voltage drop, sub-panels added over time without load calculations, outbuilding feeders that were undersized or never properly grounded, and exterior-mounted equipment that has taken years of weather. Each of those needs a different fix, which is why we evaluate before we quote.

A panel rarely fails without warning. It gives you signals for months or years first, and most homeowners either don't recognize them or assume they're normal. They are not normal, and a few of them are genuinely dangerous.

If you notice any of the following, get the panel looked at. An evaluation costs far less than the damage a failing service can do, and in many cases the outcome is simply confirmation that your panel is fine and the problem is a single circuit.

A service upgrade is more than swapping a box on the wall. The work includes a load calculation to determine the correct service size, replacing the meter base and service entrance conductors where required, installing the new panel and breakers, re-landing and labeling every branch circuit, bringing the grounding electrode system up to current code with ground rods and bonding to the water and gas systems as applicable, and adding AFCI and GFCI protection where code now requires it.

It also involves coordination we handle for you: pulling the permit, scheduling the utility disconnect and reconnect, and meeting the inspector on site. From your side, the day looks like power off in the morning and power back on in the afternoon in the large majority of standard residential jobs.

One thing we will never do is quote a panel upgrade over the phone sight-unseen. Meter base condition, service entrance cable, mast height, grounding, and existing branch circuit quality all move the number. We look first, then give you a flat written price.

For most homes the honest answer is 200 amps. The material cost difference between 150 and 200 amps at the time of installation is modest, and 200-amp service comfortably carries a heat pump, an electric range, a dryer, a water heater, a hot tub, and a Level 2 EV charger with capacity left over. If there is any chance you add an EV, a shop, or a second HVAC system in the next decade, 200 amps is the cheaper decision.

There are exceptions. A small home with gas heat, gas water heating, and no EV plans may be perfectly served by 150 amps. Some properties have utility or physical constraints that make 200 amps impractical. And occasionally the right answer is no upgrade at all — a sub-panel, a load management device, or simply repairing one bad circuit solves the problem for a fraction of the cost. We would rather tell you that than sell you a panel you don't need.

Not every capacity problem needs a service upgrade. When your main service has headroom but the panel is out of physical slots, a properly sized sub-panel is often the cleaner and less expensive fix — especially for a finished basement, a garage conversion, an addition, or a detached shop.

Sub-panels have their own rules that get broken constantly by non-electricians: neutrals and grounds must be separated in a sub-panel, detached structures need their own grounding electrode, feeders must be sized for the load and the distance, and the disconnect requirements differ from a main panel. We see improperly wired sub-panels regularly, and they are one of the more common findings on home inspections in this area.

These are the calls that repeat in Sevier County & Knoxville. If yours is on this list, it's a job we've done many times.

We cover Sevierville, Pigeon Forge, Gatlinburg, Seymour, Dandridge, and greater Knoxville — including Chalet Village, Wears Valley, Boyds Creek, Chapman Highway, Douglas Lake, and the West Knoxville subdivisions. If you're in 37876, 37862, 37863, 37738, 37865, 37725, and the Knoxville zips, we're a short drive away.

Let There Be Light Electric is owner-operated by Jaylon Harmon out of Sevierville. The person who quotes your panel is the person who does the work — no dispatcher, no rotating crews, no commission-based sales visit.

Call or text 865-255-6770 with a photo of the inside of your panel cover (the label with the amperage and manufacturer) and a photo of the meter base outside. That's usually enough for us to tell you on the phone whether you're looking at a repair, a sub-panel, or a full service upgrade, and give you a realistic range.

From there we schedule an on-site evaluation, run the load calculation, and give you a flat written price. If the answer turns out to be that your panel is fine, we'll tell you that and charge you nothing for the good news.