A working compendium.

01Panel sizing & service

The panel is the heart. Everything else is plumbing for electrons.

The number you actually need

For most single-family homes in Cincinnati, 200-amp service is the modern standard. 100-amp service is fine for a small all-gas home with no central AC and no EV. The minute you add an EV charger, a heat pump, induction cooking, or a hot tub, you're usually looking at 200-amp.

Signs your panel is at end of life

• Federal Pacific Stab-Lok or Zinsco branding. These have well-documented failure modes; insurance companies often flag them. Replacement is the right call regardless of current behavior.
• Rust on the bottom of the cabinet. Means water got in. Even if it's dry now, the bus bars may be compromised.
• Breakers warm to the touch under normal load.
• A burnt smell, ever. Once is enough.
• Two wires under one breaker terminal that wasn't designed for tandem.
• Aluminum branch wiring (not service entrance, branch). Different beast than knob-and-tube; needs special handling at every connection.

02EV chargers at home

Probably the most-asked question of the last three years. Short version:

Will my panel handle it?

The honest answer is "do the math, don't guess." A proper load calculation looks at your panel size, your existing load (heat, AC, water heater, range, dryer), and adds the new charger. If you're already running heat pump plus electric range plus dryer on a 100-amp panel, an EV charger probably wants either a panel upgrade or a smart load-management device that pauses the car when the dryer kicks on.

Hardwired vs. plug-in (NEMA 14-50)

Hardwired chargers are slightly more efficient and don't depend on a $40 outlet's contact integrity over ten years. Plug-in chargers are portable if you move and easier to swap if the charger itself fails. Either is fine. Don't use a plain dryer cord on a charger meant to be hardwired \u2014 the duty cycle is different.

03Why breakers trip

Three reasons in order of likelihood:

1. Too much on one circuit. A 15-amp kitchen circuit with the toaster, the microwave, and the air fryer is going to trip. Not a problem with the wiring \u2014 the breaker did its job.
2. A failing device. Old motors, damaged extension cords, a fridge whose compressor is on its last legs. Unplug everything on the circuit. If it stops tripping, plug back in one at a time.
3. A failing breaker. Breakers wear out, especially the ones that trip often. They become more sensitive over time and eventually trip with no real fault. Replacement is cheap.

Nuisance trips from AFCI/GFCI

Arc-fault and ground-fault breakers (AFCI/GFCI) trip on things a regular breaker would ignore \u2014 a slightly leaky neutral, a worn brush in a motor, a hair dryer that's about to die. That's a feature, not a bug. It means the breaker caught something before it became a fire. But it does mean older appliances on a newly-AFCI-protected circuit will sometimes trip. The fix is usually the appliance, not the breaker.

04Knob-and-tube reality

Cincinnati has a lot of pre-1940 houses, and a lot of them still have knob-and-tube somewhere. Here's the honest picture:

What it is

Two separate conductors (hot and neutral) run through porcelain knobs and tubes, with cloth and rubber insulation. No ground wire. When installed correctly in open air, it stays cool because it can dissipate heat in all directions.

Why it's actually a problem

• Insulation buried it. 1980s blown-in attic insulation packed against the wires traps heat. That's the single biggest fire risk.
• The cloth is brittle. Anyone bumping a junction in the attic can crumble decades-old insulation off the conductor.
• Three-prong outlets on it are lying. The ground pin isn't connected to anything. Surge protectors plug in but don't actually protect.
• Insurance. Many companies won't write a new policy on a house with active knob-and-tube. Some will, with conditions and a higher premium.
• Splices. Decades of homeowners cutting in new outlets created untold numbers of in-wall splices that are no longer code-compliant.

Options, cheapest to most thorough

1. Targeted abandonment. Identify the specific circuits still on K&T, kill them at the panel, run new replacement circuits to the rooms they served. Doable in stages.
2. Full attic and second floor rewire. The high-risk zones. Often what insurance asks for.
3. Whole-house rewire. The durable answer. Disruptive but final.

05GFCI & AFCI in plain English

GFCI \u2014 Ground Fault Circuit Interrupter

Compares the current going out the hot wire with the current coming back on the neutral. If they differ by more than ~5 milliamps, it trips, because that current is leaking to ground \u2014 possibly through a person. Required in bathrooms, kitchens, garages, outdoors, basements, and anywhere near water.

AFCI \u2014 Arc Fault Circuit Interrupter

Listens for the electrical signature of an arc \u2014 the rapid on-off-on of a loose connection or damaged wire. Arcing is the proximate cause of a huge percentage of residential fires. Required in most living-space circuits in modern installs.

Combination AFCI/GFCI breakers (CAFI/DFCI)

A single breaker that does both. More expensive, takes one slot in the panel, common in newer kitchen and laundry circuits where both protections are required.

06What photos help us quote

If you can safely take these, we can usually quote without a site visit:

• The panel with the door closed (so we can read the sticker).
• The panel with the door open (so we can read the breakers).
• The panel with the cover off, only if you're comfortable. Flashlight, no contact with anything inside.
• The meter outside (so we can see service size and condition of the entrance cable).
• The room or area where the new work is going \u2014 wide shot.
• A close-up of any specific outlet, switch, or fixture in question.

07Buying a house: what to check

The inspector's report covers a lot, but rarely in enough detail to know what you're really buying. Things we look at on a pre-purchase walkthrough:

• Panel make and age. Federal Pacific or Zinsco changes the math on the offer.
• Service entrance cable. Frayed or sun-cracked insulation outside is a near-term replacement.
• Grounding system. Two ground rods, bonded water pipe, bonded gas line. Often missing in older homes.
• Knob-and-tube presence and extent. Attic and basement reveal most of it.
• GFCI/AFCI coverage. Bathrooms, kitchens, outdoor outlets at minimum.
• Smoke and CO detectors. Hardwired and interconnected vs. battery-only.
• Outdoor lighting and outlets. Often the most weather-damaged and most overlooked.
• Any visible DIY work. Backstabbed outlets, missing junction box covers, unprotected splices, switches that don't switch what they're labeled to switch.

A walkthrough takes about an hour and gives you a written summary you can bring to negotiation.

08Price ranges to expect

This page used to have rough tiers ($, $$, $$$) because most electricians won't put real numbers in public. We decided that wasn't enough.

Short version: we quote real numbers up front, in writing. Flat rate for defined work, capped time-and-materials for diagnostics. No memberships, no trip charges, no surprise add-ons after the fact. Permit fees included. Materials at cost on jobs over $1,500.

09Questions to ask anyone you hire

Whether it's us or someone else, these are worth asking before you sign anything:

• "What's included in the price, and what would change it?"
• "Who's actually doing the work \u2014 the person I'm talking to, or a sub I haven't met?"
• "What happens if something goes wrong six months from now?"
• "Do you pull permits when permits are needed?"
• "Can you walk me through the change once it's done?"
• "What's the soonest you can start, and how long will it take?"

An honest contractor answers all of these without hedging. A red flag is the answer "depends" to the first question with no follow-up about what specifically depends on what.

10Safety: when to flip the main

You're not overreacting. Flip the main breaker, then call:

• Burnt or melted-plastic smell coming from any outlet, switch, or the panel itself.
• Sparking from an outlet, switch, or fixture.
• Visible smoke from anywhere electrical.
• Buzzing or crackling from the panel, even faint.
• Water actively entering the panel or running down service entrance cable.
• Lights pulsing in sync with each other (often a loose neutral at the service \u2014 utility-side problem).