Electrical Repair FAQ

A breaker that trips repeatedly has one of these underlying causes, in order of likelihood:

1. Overloaded circuit — Too many devices drawing power on one circuit. Common in kitchens, bathrooms, and home offices. Unplug some devices and redistribute the load across different circuits. 2. Short circuit — A hot wire touching a neutral or ground wire creates a sudden surge of current. This can be caused by damaged wiring, a faulty appliance, or a loose connection. Unplug everything on the circuit and reset. If it trips with nothing plugged in, you have a wiring short. 3. Ground fault — Similar to a short circuit but involves current leaking to ground through water, metal, or damaged insulation. Common in damp areas. 4. Faulty breaker — Breakers wear out over time and can trip at lower-than-rated current. If the breaker feels loose or will not stay reset, it may need replacement. 5. Arc fault — Damaged wiring inside walls can arc intermittently, tripping AFCI breakers. This requires professional diagnosis.

Important: Never replace a breaker with a higher-amperage one to stop tripping. The breaker is sized to protect the wire. A 15-amp breaker on 14-gauge wire is correct — putting a 20-amp breaker on that circuit removes the protection and creates a fire hazard.

A dead outlet has several possible causes. Check these in order:

1. Tripped breaker — Check your electrical panel for a breaker in the middle position. Flip it fully OFF, wait 30 seconds, then flip ON. 2. Tripped GFCI — A GFCI outlet upstream on the same circuit may have tripped, cutting power to downstream outlets. Check all GFCI outlets in the room and nearby rooms (especially kitchens, bathrooms, and garages). Press RESET on any that have tripped. 3. Loose plug — Some outlets lose grip over time and plugs fall partially out. Try a different device in the outlet. 4. Tripped AFCI breaker — If the circuit has an arc-fault breaker, it may have tripped due to a detected arc. Reset at the panel. 5. Loose wire connection — A wire may have come loose behind the outlet, especially if the outlet uses backstab connections (wires pushed into holes rather than wrapped around screws). This requires turning off the breaker and checking the connections. 6. Failed outlet — Outlets can fail internally, especially backstabbed outlets. Replace the outlet ($2-5 for the part).

If only the top or bottom half of a duplex outlet is dead, it may be a switched outlet — check nearby light switches.

Flickering lights range from harmless to dangerous depending on the cause:

- Single bulb flickers: Usually a loose bulb or a failing bulb. Tighten the bulb or replace it. If the fixture itself has a loose socket, the fixture may need replacement. - Flickers when appliance turns on: Large motors (AC compressor, refrigerator, washing machine) draw a momentary surge when starting. A brief dim is normal. If the dimming is severe or lasts more than a second, the circuit may be overloaded or the main panel connection may be loose. - All lights in one room flicker: Loose connection at the circuit breaker, a loose neutral wire, or a failing breaker. Turn off the circuit and call an electrician. - All lights in the house flicker: This indicates a problem at the main service entrance — the utility connection, the meter, or the main panel connections. Contact your utility company first (they will check their side for free), then call an electrician if the utility side is fine. - Flickering with a burning smell: Shut off the circuit immediately. This indicates arcing at a connection point — a fire hazard.

LED bulbs on dimmer switches may flicker if the dimmer is not LED-compatible. Replace the dimmer with one rated for LED loads.

A GFCI that will not reset has one of these issues:

1. No power to the GFCI — Check the breaker. If the breaker has tripped, reset it first, then try the GFCI. 2. Active ground fault — There is an actual fault somewhere on the circuit. Unplug everything connected to that GFCI (including downstream outlets), then try to reset. If it resets with everything unplugged, plug items back in one at a time to find the faulty device. 3. Moisture — Water in the outlet box or on the wiring can cause a persistent ground fault. Common after rain in outdoor outlets or after a bathroom gets very steamy. Let the area dry completely and try again. 4. Miswired GFCI — If the LINE and LOAD terminals are reversed, the GFCI will not reset or will not function correctly. This is a wiring error that needs to be corrected. 5. Failed GFCI — GFCI outlets have a lifespan of 10-15 years. After that, the internal sensing circuit can fail, preventing the outlet from resetting. Replace the GFCI.

If a new GFCI will not reset immediately after installation, the wiring is incorrect — double-check the LINE and LOAD connections.

A burning smell from an electrical outlet, switch, or panel is an emergency. Follow these steps:

1. Do not ignore it — A burning smell means something is overheating. This is either a fire in progress or one about to start. 2. Turn off the circuit — Go to your electrical panel and turn off the breaker for that circuit. If you are unsure which breaker, turn off the main breaker. 3. Do not use the outlet or switch — Even after turning off the breaker, do not plug anything into the outlet or use the switch until it has been inspected by an electrician. 4. Check for visible damage — Look (but do not touch) for scorch marks, melted plastic, or discoloration on the outlet, switch plate, or surrounding wall. 5. Call an electrician — This is an urgent call. If you see smoke or flames, call 911 first.

Common causes of burning smells: loose wire connections causing arcing, overloaded circuits, backstabbed connections that have worked loose, failing outlets or switches, and aluminum wiring connections overheating.

Never cover up or paint over a discolored outlet cover plate — the discoloration is evidence of overheating and the underlying problem must be fixed.

Buzzing from an electrical outlet or switch indicates an issue that should be addressed:

- Buzzing outlet: Usually caused by a loose wire connection inside the outlet box. The loose connection creates a small arc that produces the buzzing sound. Turn off the breaker and tighten the wire connections, or replace the outlet. Loose connections generate heat and are a fire risk. - Buzzing switch: Dimmer switches produce a slight hum during normal operation — this is the electronic circuit controlling the light level. A loud buzz often means the dimmer is incompatible with the bulb type (especially with LED bulbs). Replace the dimmer with one rated for your bulb type. A standard (non-dimmer) switch that buzzes has a loose connection or is failing — replace it. - Buzzing from the panel: A slight hum from a breaker panel is normal. Loud buzzing indicates a loose breaker, a loose bus bar connection, or an overloaded breaker. This requires professional attention. - Buzzing from a light fixture: Usually a failing ballast (fluorescent lights) or an incompatible LED driver. Replace the ballast or switch to LED-compatible fixtures.

Any buzzing accompanied by warmth, a burning smell, or flickering is a higher-priority issue that should be addressed immediately.

Aluminum branch circuit wiring, used in homes built between approximately 1965 and 1973, presents an elevated fire risk compared to copper wiring. The Consumer Product Safety Commission (CPSC) found that homes with aluminum wiring are 55 times more likely to have fire-hazard conditions at connections.

The problem is not the wire itself but the connections. Aluminum expands and contracts more than copper when heated by electrical current. Over years of heating and cooling cycles, connections at outlets, switches, and fixtures loosen. Loose connections create resistance, resistance creates heat, and heat can ignite surrounding materials.

Signs of aluminum wiring problems: - Outlets or switch plates that are warm to the touch - Discolored or melted outlet covers - Flickering lights - Intermittent power to outlets - Burning smell near outlets

The fix: Have a licensed electrician install COPALUM or AlumiConn connectors at every connection point. This costs $50-75 per connection, or $2,000-5,000 for a whole house. Do NOT use standard wire nuts to connect aluminum to copper — they are not rated for this and will fail.

Aluminum wiring in the main service cable (from the meter to the panel) is different from branch circuit wiring and is standard and safe when properly installed.

Electrical panel upgrade costs depend on the scope of work:

Panel replacement (same amperage): - 100-amp panel swap: $1,000-2,000 - 200-amp panel swap: $1,200-2,500

Service upgrade (increasing amperage): - 100A to 200A upgrade: $1,500-4,000 - 200A to 400A upgrade: $3,000-6,000 - Includes new panel, meter base, service cable, and utility coordination

Fuse box to breaker panel: - Same amperage conversion: $1,500-3,000 - With service upgrade to 200A: $2,500-4,500

Sub-panel addition: - 60A sub-panel: $500-1,000 - 100A sub-panel: $800-1,500

Factors that increase cost: Utility requires underground service upgrade, panel is in a difficult location, asbestos is present in the existing installation, additional circuits need to be added during the upgrade, or code corrections are required on existing wiring.

All panel work requires a permit ($50-200) and an inspection. The permit and inspection protect you — they ensure the work meets code and is safe. Never let an electrician skip the permit to save money.

DIY-safe electrical work (with the breaker OFF and verified with a voltage tester): - Replace light switches (single-pole and three-way) - Replace standard outlets - Replace light fixtures and ceiling fans (on existing boxes) - Install GFCI outlets (follow LINE/LOAD markings carefully) - Replace a thermostat - Replace smoke detector batteries and units - Reset tripped breakers - Install low-voltage items (doorbells, landscape lighting, smart home sensors)

Always hire a licensed electrician for: - Any work inside the electrical panel - Adding new circuits or outlets - Running new wire through walls, ceilings, or floors - Panel upgrades or replacements - Aluminum wiring remediation - Knob-and-tube replacement - Any work requiring a permit - 240V circuits (dryers, ranges, EV chargers, AC units) - Outdoor wiring and underground conduit - Any situation where you are unsure

The golden rule: if it involves the panel, new wiring, or anything you are not 100% confident about, hire a professional. A $150 service call is far cheaper than a house fire or electrocution.

Two-prong outlets lack a ground wire, which means there is no path for fault current to safely return to the panel. You have several options:

1. Install a GFCI outlet (best DIY option): You can legally replace a two-prong outlet with a GFCI outlet even without a ground wire. The GFCI provides shock protection by detecting current imbalances. Label it "No Equipment Ground" as required by code. Cost: $15-25 per outlet.

2. Install a GFCI breaker: A GFCI breaker at the panel protects all outlets on that circuit. This is more economical if the circuit has many two-prong outlets. Cost: $40-60 per breaker plus electrician labor.

3. Run a ground wire (most complete fix): An electrician runs a new ground wire from each outlet back to the panel. This provides true grounding and allows standard three-prong outlets. Cost: $100-300 per outlet depending on accessibility.

4. Rewire the circuit (most thorough): Replace the entire circuit with modern NM cable that includes a ground wire. Best done during a renovation. Cost: $200-500 per circuit.

What NOT to do: Never install a three-prong outlet on a circuit with no ground wire and no GFCI protection. The third prong implies grounding that does not exist, creating a false sense of security. Also never use a cheater plug (three-to-two adapter) as a permanent solution.

Dimmer switch problems are usually caused by compatibility issues:

- Buzzing or humming: The dimmer is incompatible with the bulb type. LED bulbs require LED-rated dimmers. Incandescent dimmers used with LEDs will buzz, flicker, or fail to dim smoothly. Replace the dimmer with one specifically rated for LED use. - Flickering at low levels: The dimmer's minimum load is higher than what the LED bulb draws. Look for dimmers with adjustable low-end trim that lets you set the minimum dim level. - Not dimming fully: Some LED bulbs are not dimmable at all — check the bulb packaging. If the bulb is dimmable, the dimmer may not be compatible with that specific LED driver. - Dimmer feels warm: All dimmers generate some heat during normal operation — this is expected. However, if the dimmer is hot to the touch, the load may exceed the dimmer's wattage rating. Check the dimmer's maximum wattage (typically 600W for incandescent, 150W for LED) and compare it to the total wattage of the bulbs it controls. - Dimmer controls multiple fixtures unevenly: Some fixtures dim while others do not. This usually means the fixtures use different types or brands of bulbs. Use identical bulbs in all fixtures on the same dimmer.

When buying a new dimmer, check the manufacturer's compatibility list for your specific LED bulbs. Lutron and Leviton publish online lists showing which bulbs work with which dimmers.

A chirping smoke detector (short beep every 30-60 seconds) is different from an alarm (continuous loud beeping). Here is what each pattern means:

- Single chirp every 30-60 seconds: Low battery. Replace with a fresh battery (usually 9V or AA). Even hardwired smoke detectors have backup batteries that need replacing. - Chirping after battery replacement: The detector may need to be reset. Remove the battery, hold the test button for 15-20 seconds to drain residual charge, install the new battery, and test. - Chirping with new battery: The detector itself has reached end of life. All smoke detectors expire after 10 years (the manufacture date is printed on the back). Replace the entire unit. - Intermittent chirping: Could be caused by temperature fluctuations, humidity, dust, or insects in the detector. Clean the detector with compressed air and see if the chirping stops. - Three beeps in a pattern: Many detectors use specific beep patterns for different alerts (smoke, CO, malfunction). Check the manufacturer's documentation for your specific model.

Smoke detector placement: Install on every level of the home, inside each bedroom, and outside each sleeping area. Mount on the ceiling or high on the wall (smoke rises). Keep at least 10 feet from cooking appliances to reduce false alarms.

Replace ALL smoke detectors when one expires — they were likely all installed at the same time and will fail around the same time.

No. Extension cords are designed for temporary use only. Using them as permanent wiring is a leading cause of residential electrical fires. Here is why and what to do instead:

Why extension cords are dangerous long-term: - They are not designed for sustained loads and can overheat - They create trip hazards - Connections loosen over time, creating arc points - They are often run under rugs, through walls, or around furniture where heat cannot dissipate - Damage from foot traffic, furniture, pets, and vacuum cleaners goes unnoticed

The NFPA and CPSC recommend: - Use extension cords for 30 days or less - Never use them as a substitute for permanent wiring - Never daisy-chain extension cords or power strips - Never run them through walls, ceilings, doors, or windows - Never use indoor extension cords outdoors - Match the cord gauge to the load (12 or 14 gauge for appliances, 16 gauge for light-duty electronics only)

The permanent solution: If you need power where there is no outlet, have an electrician install one. A new outlet on an existing circuit costs $100-250 — far less than the cost of an electrical fire. If your home consistently needs extension cords, it does not have enough outlets and an electrician can add circuits.

A full rewire is a major investment ($8,000-20,000 for an average home), so you want to be sure it is necessary. Here are the indicators:

Definitely rewire if: - Your home has knob-and-tube wiring (pre-1950s) — it lacks grounding, insulation deteriorates, and it cannot safely handle modern loads - Your home has cloth-insulated wiring (pre-1960s) that is crumbling — exposed conductors are a fire hazard - You have had an electrical fire or near-miss - Multiple circuits have persistent problems despite individual repairs

Strongly consider rewiring if: - Your home has aluminum branch circuit wiring and you prefer a permanent solution over pigtailing - You are doing a major renovation that opens walls — rewiring during construction is 50-70% cheaper than doing it later - Your insurance company requires it or charges significantly higher premiums - You have 60-amp service with a fuse box and plan to stay in the home long-term

Probably not necessary if: - Your home has copper wiring in good condition - You have a modern breaker panel with adequate capacity - Issues are limited to one or two circuits (targeted repair is more appropriate) - Your home was built after 1990 and has had no significant electrical problems

A licensed electrician can perform a whole-house evaluation ($150-300) to assess the condition of your wiring and provide a recommendation.

The recommended inspection frequency depends on your home and its electrical system:

Every 3-5 years: - Homes built after 1990 with copper wiring and a modern breaker panel - Homes with no history of electrical problems - Condos and townhouses with recently updated electrical

Annually: - Homes over 40 years old - Homes with aluminum wiring (even with remediation) - Homes with a fuse box - Homes with knob-and-tube wiring (even partial) - Rental properties (landlord obligation for tenant safety)

Also inspect after: - Purchasing a home (separate from the home inspection — hire a licensed electrician for a dedicated electrical inspection) - A major storm, lightning strike, or flooding - Any renovation that adds electrical loads - Recurring electrical problems (flickering, tripping, warm outlets) - Insurance company request

What an inspection covers: Service entrance, panel condition, grounding and bonding, GFCI and AFCI protection, visible wiring condition, outlet and switch testing, load analysis, and code compliance review.

Cost: $150-300 for a whole-house electrical inspection. Some electricians offer this as part of a maintenance plan. The inspection cost can save you thousands by catching problems early.