Union, Middlesex & Monmouth counties NJ Lic. 34EI 01904500 · Licensed, bonded & insured (908) 447-8680
Co. · Rahway, NJLic. 34EI 01904500 (908) 447-8680

Electrical answers

Straight answers to common problems.

35 questions we hear every week, answered plainly. Search, or jump to a topic.

Written by Covenant Electric Co. for homeowners and property owners in Union, Middlesex & Monmouth counties. General guidance only: every building is different, and when in doubt, turn the power off and call a licensed electrician.

Power problems

Why does my circuit breaker keep tripping?

Breakers trip to protect the wiring: either too much is running on the circuit (an overload), a hot wire is touching neutral or ground (a short or ground fault), or the breaker itself is failing.

Notice when it happens. Tripping when the microwave and toaster run together is an overload, and a dedicated circuit fixes it. Tripping the moment you flip it back on, with nothing plugged in, points to a short in the wiring or a device, so leave it off and call us. Never replace a breaker with a larger one to make it stop; the wire behind it is only rated for the original size.

Half of my house lost power but the other half works. What does that mean?

Most New Jersey homes are fed by two 120-volt legs. Losing half the house usually means one leg is down, either at the utility's connection, in the service wires, or at the main breaker.

First check your main breaker and any tripped breakers. If nothing is tripped, call PSE&G or JCP&L (whichever serves you) to check their side, because a damaged overhead drop or underground connection is theirs to fix. If lights are also unusually bright or dim, turn off electronics and call right away, since that can be a failing neutral connection that can damage appliances.

Why do my lights flicker or dim when appliances turn on?

A small, quick dip when a large motor starts, like central air or a sump pump, is normal. Flickering that is frequent, getting worse, or happening across several rooms is not.

Single-fixture flicker is usually a loose bulb, a failing LED, or a dimmer that isn't rated for LEDs. Whole-house flicker points to a loose connection in the panel, at the meter, or in the service wires, and loose connections generate heat. In older Rahway, Linden and Elizabeth homes, we also find overloaded shared circuits from decades of additions. Have persistent flicker checked before it becomes a burned connection.

An outlet stopped working but the breaker isn't tripped. What should I check?

Look for a tripped GFCI outlet first. One GFCI in a bathroom, kitchen, garage, basement or outside can shut off several other outlets, sometimes in a different room.

Press 'Reset' on every GFCI you can find. If that doesn't do it, the next most likely cause is a loose connection at the dead outlet or at the last working outlet on the same run, often at a push-in 'backstab' terminal. That's a small repair, but it involves opening boxes on a live circuit, so it's a job for an electrician.

My GFCI keeps tripping on its own. Is it bad?

Sometimes. GFCIs wear out after 10 to 15 years. But frequent tripping usually means it is catching a real problem: moisture in an outdoor box, a failing appliance, or damaged wiring downstream.

Unplug everything on that GFCI and see if it holds. If it does, add things back one at a time to find the culprit. If it trips with nothing connected, check for water in outdoor or basement outlets, which is common after heavy rain. A worn GFCI should be replaced, not bypassed, since it's there to prevent electrocution.

What should I do when the power goes out?

Check whether the neighbors have power. If they don't, report it to your utility: PSE&G at 1-800-436-7734 or JCP&L at 1-888-544-4877. If they do, check your main breaker and panel.

Unplug sensitive electronics so they aren't hit by a surge when power returns. Keep the fridge and freezer closed. Never run a generator indoors or in an attached garage, and never plug a generator into an outlet to backfeed the house. If only part of your home is out, or the panel smells hot, call an electrician.

Panels & service upgrades

How do I know my electrical panel needs replacing?

Plan on replacing a panel that is over 30 years old, out of breaker spaces, rusted, warm to the touch, showing scorch marks, or made by Federal Pacific (Stab-Lok), Zinsco or Challenger.

In Union County basements, rust is the most common problem we see: humidity and past flooding corrode bus bars and breakers. Other signals are breakers that won't reset, a crackling sound, a burning smell, or lots of double-tapped and tandem breakers. A new panel also makes room for the loads homeowners are adding now: EV chargers, heat pumps, and induction ranges.

Is 100-amp service enough, or do I need 200 amps?

For many older homes with gas heat and gas cooking, 100 amps is still enough. If you're adding central air, an EV charger, a heat pump, an electric range, a finished basement or an addition, plan on 200 amps.

The right answer comes from a load calculation, the method the National Electrical Code uses to size a service. We do that calculation before recommending an upgrade. Sometimes a smart load-management device or subpanel lets you add a big appliance without the cost of a full service change.

Are Federal Pacific and Zinsco panels actually dangerous?

Yes. Both have well-documented histories of breakers that fail to trip during overloads or short circuits, which is the one job a breaker has. Many New Jersey home inspectors and insurers flag them.

Because the failure only shows up at the moment of a fault, years without problems don't prove the panel is safe. Replacement is the permanent fix, and most panel swaps are completed in a day with a permit and township inspection.

What's involved in a service upgrade in New Jersey?

A service upgrade replaces the meter socket, service entrance cable and main panel, and requires a permit from your township's construction office plus coordination with PSE&G or JCP&L.

The sequence is: load calculation and quote, permit application, utility work order, install day (power is off for part of the day), electrical inspection, then the utility reconnects and sets the meter. We manage the permit, the inspection and the utility scheduling so you aren't coordinating three offices yourself.

Do I need a whole-house surge protector?

It's one of the best-value upgrades you can make. A surge protector at the panel protects the circuit boards in your furnace, air conditioner, appliances and electronics from spikes caused by lightning and utility switching.

The current National Electrical Code now requires surge protection when a service or panel is replaced in a home, which tells you how common surge damage has become. Pair it with plug-in surge strips for TVs and computers for layered protection.

What's the difference between a GFCI and an AFCI breaker?

GFCI protection stops electric shock by cutting power when current leaks to ground. AFCI protection prevents fires by detecting dangerous arcing in damaged cords and loose connections.

Code requires GFCI protection in wet and damp areas like kitchens, baths, basements, garages, laundry areas and outdoors, and AFCI protection on most living-area circuits in new work. Combination (dual-function) breakers give you both in one device and are common in panel replacements.

Older homes & wiring

My house has knob-and-tube wiring. Does it have to be replaced?

It isn't automatically illegal, but it's worth replacing. Knob-and-tube has no ground, was never designed for today's loads, and its insulation becomes brittle after nearly a century. Many insurers won't cover a home that still has active knob-and-tube.

Pre-war homes in Rahway, Cranford, Westfield and Elizabeth still turn up active runs, often buried in attic insulation, which is a fire risk because the wiring was designed to shed heat into open air. We can trace what's live and replace it room by room with minimal wall damage.

Are two-prong outlets safe?

Two-prong outlets aren't dangerous by themselves, but they have no ground. That removes a safety path and keeps surge protectors from working properly.

The right fixes are either running a new grounded circuit, or installing GFCI protection at the first outlet on the circuit, which the electrical code allows for ungrounded outlets as long as they're labeled. A cheap three-prong adapter or a three-prong outlet without a ground is not a fix; it just hides the problem.

Should an older home get a full rewire?

Not always. Many homes need targeted upgrades rather than a complete rewire. A full rewire makes sense when a house has widespread knob-and-tube, crumbling cloth-insulated wiring, or years of unsafe DIY work.

We start with an evaluation of the panel, the wiring type in each area, grounding, and the condition of connections. Then we give you options in priority order, so safety items come first and the rest can be planned around budget and renovation schedules.

Why are my outlets or switch plates warm?

Dimmers can run slightly warm. Regular outlets and switches should not. Warmth usually means a loose connection, an overloaded circuit, or a failing device.

Stop using the outlet, and if it is hot or discolored, turn off the breaker. Heat at a connection gets worse over time as the metal oxidizes, and it can melt the device and the wire insulation. It's an inexpensive fix when caught early.

Can you add outlets or circuits without tearing up my walls?

In most cases, yes. We fish wire through walls and ceilings from the basement, attic or closets, cutting only small, patchable openings.

Plaster-and-lath walls, common in older Union County homes, take more care than drywall, but they can be worked through cleanly. Adding outlets is one of the simplest ways to get rid of extension cords and overloaded power strips, which are a common cause of home fires.

What electrical issues come up when selling a home in New Jersey?

The big one is the Certificate of Smoke Alarm, Carbon Monoxide Alarm and Fire Extinguisher Compliance your town requires before closing. Buyers' inspectors also commonly flag old panels, missing GFCIs, double-tapped breakers, and ungrounded outlets.

New Jersey requires 10-year sealed-battery smoke alarms in homes being sold unless they are hardwired, along with CO alarms near sleeping areas where there are fuel-burning appliances or an attached garage. Fixing electrical items before listing usually costs less than negotiating credits after the inspection.

Storms, flooding & generators

My basement flooded. Is my electrical system safe?

Assume it isn't until it's checked. Keep the power to flooded areas off, don't touch panels, outlets or appliances that were under water, and have an electrician inspect before re-energizing.

After Ida, many Union County basements needed new panels, outlets, breakers and even service equipment, because water leaves corrosion and contamination inside devices that can fail later. Water-damaged breakers, GFCIs and panels are generally replaced, not dried out. If your utility disconnected service, the repairs usually need an inspection before they'll restore power.

Should I get a standby generator?

If outages are more than an inconvenience, for example if you have a sump pump, well pump, medical equipment, or work from home, a standby generator is worth it.

Standby units run on natural gas or propane, start automatically within seconds, and exercise themselves weekly. Sizing depends on what you want powered: a sump pump, furnace and fridge need far less than whole-home coverage with central air. We handle the load calculation, the transfer switch, the permit and inspection.

Can I connect my portable generator to my house?

Yes, but only through a transfer switch or an interlock kit with a proper inlet. Never backfeed the house through a dryer outlet or a 'suicide cord'.

Backfeeding sends power into utility lines, where transformers step it up to thousands of volts and can kill a lineworker. It also creates a fire risk when grid power returns. An inlet box and interlock is an affordable, code-approved way to run selected circuits from a portable generator.

What size generator do I need?

For essentials like a sump pump, fridge, furnace blower, lights and outlets, a 7 to 10 kW portable or small standby unit is often enough. Whole-house coverage with central air typically needs 20 to 26 kW.

Motor loads matter most: sump pumps and air-conditioner compressors pull a surge when they start. We size generators from your actual loads, not guesses, so the unit isn't too small to start the AC or bigger (and more expensive) than you need.

How should I prepare my electrical system for storm season?

Install whole-house surge protection, test your sump pump and its battery backup, make sure outdoor outlets have weatherproof covers and GFCI protection, and know how to shut off your main breaker.

Nor'easters and summer thunderstorms both cause long outages across central Jersey. Have a safe generator connection ready before you need it, and keep flashlights, not candles, near the panel. After a storm, stay far away from downed lines and treat every one as live.

EV chargers, lighting & upgrades

What do I need for a home EV charger?

A Level 2 charger needs a dedicated 240-volt circuit, typically 40 to 60 amps, and enough spare capacity in your panel to support it.

We check capacity with a load calculation, recommend a circuit size based on your vehicle and charger, and install either a 240-volt outlet or a hardwired wall unit. New Jersey and PSE&G have offered incentives for home charging in recent years; programs change, so check current rebates before you buy the charger and keep your paperwork.

Can my panel handle a heat pump or induction range?

Often, but not always. Heat pumps and induction ranges each need a large 240-volt circuit, and older 100-amp panels can run out of capacity quickly.

A load calculation tells us whether you can add the appliance as-is, need a subpanel or load management device, or should upgrade the service. It's worth doing before you order the equipment, since it can change the total project cost.

Are LED recessed lights worth it?

Yes. Modern LED wafer lights are thin enough to install in most ceilings without big cutouts, use a fraction of the power of old cans, and don't create the attic heat and air leaks older fixtures did.

Choose a color temperature (2700K to 3000K feels warm and residential), put them on an LED-compatible dimmer, and plan the layout so light lands where you use it, not just in a grid. We lay out lighting as part of kitchen, basement and whole-floor renovations.

Do I need an electrician to install a ceiling fan?

If there's already a fan-rated box and wiring in place, a handy homeowner can often swap a fixture. If the box isn't rated for a fan, or you want a new location or separate fan and light controls, hire an electrician.

Ceiling fans are heavy and vibrate, so they must hang from a box and brace rated for fans. A standard light box can loosen over time and let the fan fall. We install fan braces from below without opening the ceiling in most cases.

Safety & warning signs

When is an electrical problem an emergency?

Call immediately for a burning smell, smoke, sparks, a hot or buzzing panel, scorched outlets, water on electrical equipment, a shock from a fixture or appliance, or a partial power loss with lights getting brighter or dimmer.

If you see smoke or flames, leave and call 911. Otherwise, turn off the affected breaker, or the main if you can't tell which circuit, and call an electrician. A dead outlet or a single light that won't work can usually wait for a scheduled visit.

I smell something burning but can't find it. What should I do?

Treat it as serious. Check outlets, switches, fixtures, power strips and the panel for heat or discoloration, and turn off any suspect circuit. If you can't isolate it, shut off the main breaker and call.

Overheating wiring can smell like burning plastic or fish. It can start inside a wall well before any visible damage. Don't wait to see if it goes away.

Why did I get a shock from a switch, appliance or faucet?

Any shock means current is taking a path it shouldn't. Stop using the item, turn off its circuit, and have it checked.

Common causes are a damaged cord or appliance, a missing ground, a loose neutral, or a bonding problem with plumbing. A tingle in the shower or from a faucet deserves a prompt visit, since it can indicate a problem affecting the whole house.

How often should smoke and CO alarms be replaced?

Replace smoke alarms every 10 years and CO alarms every 7 to 10 years, per the date printed on the back. Test them monthly.

In New Jersey, battery-only smoke alarms should be 10-year sealed units. Hardwired, interconnected alarms are best, because when one sounds they all sound. Put smoke alarms in every bedroom, outside sleeping areas and on every level, and CO alarms on every level near sleeping areas.

Permits, pricing & working with us

Does electrical work in New Jersey need a permit?

Most does. Under New Jersey's Uniform Construction Code, new circuits, panel and service work, generators, EV chargers, renovation wiring and many fixture additions require an electrical permit and inspection from your municipality.

Minor repairs and like-for-like replacements of outlets, switches and fixtures are generally exempt. Permits protect you: the work is inspected, and it keeps your insurance and eventual sale clean. We file the permits and meet the inspector.

Can a homeowner do their own electrical work in New Jersey?

New Jersey lets homeowners do some electrical work on a single-family home they own and live in, but they still need permits and inspections, and the work must meet code.

Electrical contracting for others must be done by a licensed New Jersey electrical contractor. For panel, service and new-circuit work, the risk and the inspection hurdles usually make a licensed electrician the better choice.

How do you price jobs?

Clearly and in writing. Repairs are quoted after we diagnose the problem, and larger projects get a written proposal with the scope, the price and what's included before work begins.

Our tagline says it: in contract with man. You'll know what you're paying and what you're getting before we start, and if something unexpected turns up inside a wall, we stop and talk to you before doing extra work.

Do you work on commercial properties?

Yes. We handle electrical work for homes, multi-family buildings, offices, retail, and light commercial spaces.

Commercial work includes lighting retrofits, tenant fit-outs, new circuits for equipment, service upgrades, and code corrections. We schedule around your business hours when possible.

Put it in writing

Tell us what you need. We’ll quote it plainly.

Call (908) 447-8680