May 2020 – SkippityWhistles.com

When to Replace an Extension Cord (And What Those Numbers on the Label Mean)

A damaged extension cord is a fire hazard that most people keep using anyway. Here’s how to tell when a cord is done, what the numbers on the label actually mean, and what to replace it with.

Ron Screwstrip has an extension cord in his garage that has been there since the previous owner. It is orange. It has a crack in the insulation near the plug end that he has been meaning to look at for about two years. The crack is not getting smaller.

Extension cords are one of those household items that live in a drawer or a pile until they’re needed, get used without inspection, and get put back the same way. Most of the time nothing happens. Occasionally something does, and “occasionally” is not a reassuring statistic when the thing that happens involves electricity and a fire.

Here’s how to tell when a cord is done, what the numbers on the label actually mean, and what to buy when the old one finally goes in the trash where it belongs.

🔍 The Seven Signs a Cord Needs to Go

Cracked, cut, or frayed insulation anywhere along the cord — especially near the plugs, where cords bend most often. The insulation is what stands between the live wire inside and everything around it. A crack is not a cosmetic issue. It’s a reason to stop using the cord today.

Exposed wire. If bare copper is visible anywhere, the cord is done. Full stop. Don’t tape it. Don’t wrap it in electrical tape and consider the problem solved. Electrical tape is not a repair; it’s a delay. Replace the cord.

Bent, corroded, or missing prongs on the plug. The prongs make the electrical connection. A bent prong makes a poor connection, which generates heat at the connection point. Heat at a connection point is how cords start fires.

The cord feels warm or hot during normal use. Extension cords should be at room temperature while in use. A cord that’s warm to the touch is carrying more current than it’s rated for, or has internal damage that’s increasing resistance. A hot cord is an urgent problem.

Sparking or buzzing when you plug something in. These are signs of a failing internal connection. Unplug everything, set the cord aside, and replace it.

A plug that fits loosely in the outlet or in the device. A loose connection generates heat. See above.

Age without inspection. Extension cords don’t last forever even without visible damage. If a cord has been in the garage for a decade without anyone looking closely at it, it has earned a close look. If it passes inspection, fine. If it doesn’t, now you know.

📊 What the Numbers on the Label Actually Mean

Extension cord labels have numbers on them that most people ignore entirely. The two that matter are the gauge and the amperage rating.

The gauge — usually written as something like 12/3 or 16/3 — describes the thickness of the wire inside the cord. This is counterintuitive: a lower gauge number means a thicker wire. A 12-gauge cord has thicker wire than a 16-gauge cord, which means it can carry more current over a longer distance without overheating.

For outdoor use and power tools — drills, saws, lawnmowers, anything with a motor — you want a 12-gauge cord. For indoor use with lamps, phone chargers, and small appliances, a 14 or 16-gauge cord is fine. Using a thin cord with a high-draw tool is how cords overheat, and overheating is how fires start.

The amperage rating tells you the maximum current the cord can safely carry. Most household circuits run on 15 amps. Your extension cord should be rated for at least as much as the device you’re plugging into it. If you’re running a circular saw that draws 12 amps through a cord rated for 10 amps, you’re asking for trouble.

The UL or ETL certification label on the cord means an independent testing organization has verified that the cord meets established safety standards. Buy cords with one of these certifications. It’s not a guarantee of immortality, but it means someone other than the manufacturer checked the cord’s safety claims.

🚫 The Things That Shorten a Cord’s Life Fast

Running a cord under a rug or carpet. Cords generate a small amount of heat in normal use. Under a rug, that heat has nowhere to go. Over time this degrades the insulation and can ignite the rug. Cords are not meant to be hidden — route them along baseboards if you need to manage them, but never under floor coverings.

Daisy-chaining — plugging one extension cord into another. Each cord adds resistance. More resistance means more heat. Two extension cords plugged together are carrying the load of the second cord through the first cord’s entire length, which means the first cord is working harder than it was designed to. If you need more length, buy one longer cord.

Coiling a cord tightly while it’s in use. A tightly coiled cord under load acts like a coil of wire in an electrical circuit, which is exactly what it is — and coils build up heat. Unroll the cord fully before use. Leaving it coiled is fine for storage; it’s not fine when the cord is carrying current.

Yanking a cord out of the outlet by the cord instead of the plug. This stresses the connection between the wire and the plug, which is where most cord failures begin. Pull the plug, not the cord. Every time.

🛒 Gear Worth Having

Iron Forge Cable 25ft Outdoor Extension Cord — 12/3 SJTW, 15 Amp, UL Certified — 12-gauge wire handles serious tool loads: circular saws, drills, lawnmowers, power washers. Stays flexible in cold weather so it doesn’t crack when you uncoil it on a winter morning. Lighted end confirms the cord is live. UL certified. Veteran-owned American business. This is the cord for the garage and the yard.

Belkin 12-Outlet Power Strip Surge Protector — 8ft Cord, 4,320 Joules — For the home office, entertainment center, or workshop bench where multiple devices need a single managed source. Surge protection at 4,320 joules guards against voltage spikes that can damage electronics. Rotating plug fits in tight wall outlet configurations. The right indoor solution when a single outlet isn’t enough.

Maximm Cable Flat Extension Cord — 6ft, 16 AWG, UL Listed — For furniture, behind appliances, and anywhere a standard round cord creates a bump under a rug or won’t fit behind a cabinet. The flat profile slides neatly along baseboards and behind furniture without creating a tripping hazard or a lump under flooring. 16-gauge for lamps and small appliances; not for high-draw tools.

As an Amazon affiliate, I earn from qualifying purchases. Thank you for supporting SkippityWhistles.

📖 Related Reads

How to Use Wire Nuts

GFCI Outlets: What They Are and Why They Matter

The DIYer’s Toolbox

Ron Screwstrip threw out the orange cord. He replaced it with a 12-gauge outdoor cord that lives on a reel in the garage and a surge-protected strip on the workbench. The crack near the plug is not his problem anymore. He feels significantly better about the whole situation, and slightly embarrassed it took two years.

SkippityWhistles is part of the John D Reinhart content family. Writer, illustrator, videographer, and accidental filmmaker — find the whole story at JohnDReinhart.com.

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How to Strip a Wire Safely and Correctly

Stripping a wire means removing a section of the insulating plastic cover to expose the electrical conductor underneath. Here’s how to do it.

Ron lined up a wire clearly marked 12-gauge with the 12-gauge notch on his strippers, and the wire flatly refused to fit. He tried the 10-gauge slot instead, which was obviously too big and did nothing useful. For a solid minute, Ron was ready to declare the tool mislabeled, defective, or possibly both. It was neither. The gauge stamped on the wire refers to the bare copper hiding inside — the notch was never going to accept the wire with its insulation jacket still on, and that’s not a flaw, that’s just what stripping a wire actually means.

Stripping a wire — removing a section of insulation to expose the bare conductor underneath — is one of the most basic skills in home electrical work, and also one where a little bit of understanding prevents a surprising number of “wait, why won’t this fit” moments.

🦺 Power Off, Every Single Time

Before any wire gets anywhere near a stripper, turn off the breaker for that circuit, then confirm with a non-contact voltage tester (a tool that detects live current without needing direct contact with the wire) rather than trusting the breaker label alone.

This step never gets skipped, not for a wire that looks disconnected, not for one you’re “pretty sure” is dead. Confirm it every time.

📏 The Gauge Mismatch Ron Didn’t See Coming

Wire gauge is the number describing the thickness of the copper conductor — lower numbers mean thicker wire. It is measured on the bare copper, not the insulated jacket surrounding it. A stripper’s gauge notches are sized for that bare copper too, which means the insulated wire genuinely will not slide into its matching slot — it’s supposed to look like it doesn’t fit.

Of course the wire won’t fit in the slot, Ron. That’s the whole point of the wire stripper. It will cut through the insulation, no matter how thick, but won’t nick the copper underneath.

✂️ Stripping Solid vs. Stranded Wire

Solid wire has a single, unbroken copper core and is standard in most household wiring — straightforward to strip, since there’s only one strand to protect from nicks.

Stranded wire is made of many thin copper strands bundled together, common in cords and fixtures, and needs gentler pressure from the wire stripper since they can shear off individual strands if squeezed too hard.

After stripping stranded wire, twisting the exposed strands together keeps them neat and prevents stray ones from wandering outside a connection.

📐 How Much Insulation to Remove

Outlets and switches: about 1/2 inch is standard

Wire nuts: about 3/4 inch. Stripping too little leaves too little bare copper for a solid connection. Stripping too much leaves exposed copper sitting outside the connector once everything’s assembled, which is a real safety issue, not just an untidy one.

🔍 Reading a Good Strip vs. a Bad One

A properly stripped wire shows bright, clean copper with no nicks, gouges, or thinned spots, and for stranded wire, no loose or cut strands sticking out.

Any of those signs means cutting the damaged section off and stripping again — a nicked or weakened wire is a genuine point of failure, not a cosmetic flaw to live with.

🚫 The Mistakes Worth Avoiding

Using a utility knife instead of proper strippers is how copper gets nicked or partially sliced through.
Stripping too much insulation leaves bare wire exposed outside a connector.
A dull or damaged stripper crushes and weakens wire instead of cleanly cutting the jacket.
And guessing the gauge instead of checking it, printed right on the jacket, is exactly how Ron ended up fighting the wrong notch in the first place.

🛒 Gear Worth Having

Self-Adjusting Automatic Wire Strippers — Senses the gauge automatically and strips in one squeeze, which sidesteps the whole notch-matching guesswork entirely.

Gauge-Marked Manual Wire Strippers — Clear gauge labeling and built-in cutters, for anyone who prefers manual control over an automatic tool.

Klein Tools NCVT-3 Non-Contact Voltage Tester — Confirms a wire is actually dead before anything gets stripped, cut, or connected — the step that never gets skipped.

As an Amazon affiliate, I earn from qualifying purchases. Thank you for supporting SkippityWhistles.

📖 Related Reads

SkippityWhistles is part of the John D Reinhart content family. Writer, illustrator, videographer, and accidental filmmaker — find the whole story at JohnDReinhart.com.

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How to Use Wire Nuts (And Why the Size Actually Matters)

Wire nuts are the smallest, most important connector in residential wiring. Here’s what they actually do, how to install them correctly, and the one mistake that makes them fail.

Ron Screwstrip once connected two wires with a wire nut that was too small, gave it a firm tug to confirm it held, declared victory, and closed up the junction box. The connection failed six weeks later at eleven o’clock on a Sunday night – the sparks made a glorious sight.

Wire nuts are the smallest, least glamorous connector in residential electrical work — and one of the most important. A correct wire nut connection is invisible, reliable, and lasts for decades. An incorrect one is a loose connection looking for a moment to express itself.

Here’s what they actually do, how to install them correctly, and the one thing that makes the difference between a connection that holds and one that doesn’t.

⚡ What a Wire Nut Actually Does

A wire nut is a plastic cone with a metal spring coiled inside. When you twist it clockwise onto two or more stripped wire ends, the spring compresses around the bare copper and cinches the wires firmly together. The plastic shell insulates the connection so no bare metal is exposed.

That’s the whole mechanism. No solder. No adhesive. Just a spring gripping copper under tension. When installed correctly, the connection is as reliable as anything in your walls. When installed incorrectly — wrong size, too few twists, wires not stripped to the same length — the spring doesn’t grip properly and the connection is a problem waiting to happen.

Wire nuts are standard in residential electrical work everywhere: light fixtures (including that broken ceramic ceiling fixture), switches, outlets, and anywhere wires need to be joined inside a box. They are code-approved and have been for decades. They work — when you use the right size and install them properly.

📦 A Quick Word About the Junction Box

If you’ve heard the term “junction box” and weren’t quite sure what it referred to — you’re not alone. A junction box is simply the plastic or metal box that lives inside your walls, ceiling, or wherever two or more wires meet. It protects the wire connections from the surrounding material and gives you a safe, contained place to work.

When you take down a ceiling fixture, you’ll see the junction box up in the ceiling — it’s what the fixture was mounted to. The wires coming out of it are the ones you’ll be connecting with wire nuts. Every wire connection in your house lives inside one of these boxes. They’re required by code, and they’re your workspace.

🔴 Safety First: Power Off and Verified

Before you touch any electrical wires, go to your electrical panel — the metal box, usually in a utility room, garage, or hallway, with rows of switches called breakers — and flip the breaker that controls the room or fixture you’re working on. If you’re not sure which breaker is the right one, flip on the light switch for the fixture and flip breakers one at a time until the light goes out.

Once the breaker is off, confirm the power is actually off using a non-contact voltage tester. This is a small pen-shaped tool that beeps and lights up when it detects electricity nearby — you just hold it close to the wires without touching them. Green light means the tester is working; red light and a beep means electricity is present and you need to find the correct breaker.

This step is not optional. A non-contact voltage tester costs less than fifteen dollars and the alternative is a conversation you don’t want to have. If you don’t own one, pick one up before you open anything up.

📏 The Size Question — This Is the Important Part

Wire nuts come in different sizes, and each size is designed for a specific range of wire thicknesses and a specific number of wires. The packaging always says what wire gauges the nut is rated for — look for that before you buy.

The color coding on wire nuts changes by manufacturer, which is genuinely unhelpful, but the colors are a rough guide: orange nuts are for smaller, thinner wires; yellow nuts handle the standard household wiring gauge (14 AWG) that you’ll find in most lighting circuits; red nuts handle the slightly heavier gauge (12 AWG) used on outlets and kitchen circuits. If you’re not certain which you have, an assortment kit removes the guesswork entirely — you have every size on hand and you pick the right one for the job.

The right wire nut feels snug when you begin threading it on, grips with increasing resistance as you twist, and sits firmly when fully seated. If it spins freely and never tightens, it’s too large. If it won’t start threading at all, it’s too small. Try the next size.

🧵 A Quick Word About Wire Types

The wires in your walls are almost certainly solid wire — a single thick copper conductor wrapped in colored plastic insulation. Solid wire is what wire nuts were designed for, and it’s what you’ll encounter in virtually every ceiling fixture, switch, and outlet in a residential home.

Stranded wire — which looks like a bundle of thin copper threads inside the insulation rather than one solid piece — shows up in lamp cords, extension cords, and appliances. Wire nuts can be used with stranded wire, but the nut needs to be specifically rated for it. For a ceiling fixture replacement, you’re almost certainly working with solid wire.

🔧 How to Install a Wire Nut Correctly

Start by stripping about half an inch to three-quarters of an inch of the colored plastic insulation off the end of each wire you’re connecting. Use wire strippers for this — they have numbered slots that match wire gauges so you get a clean strip without nicking the copper underneath. The exposed copper should be shiny and undamaged. Strip each wire to the same length so the copper ends line up evenly when you hold them together.

Hold the stripped wire ends alongside each other so the copper tips are even. Now, which wire connects to which? In a standard ceiling fixture, the color tells you everything you need to know: the black wire (called the “hot” wire, the one carrying current) connects to the black wire from the fixture. The white wire (called the “neutral”) connects to the white wire from the fixture. The bare copper wire, or green wire, is the ground — it connects to the ground wire from the fixture. Same color to same color, every time.

If you’re working in a junction box where multiple wires come together — for instance, a box that feeds more than one fixture — all wires of the same color connect together under one nut. Three black wires all get twisted together under one wire nut. Three white wires under another. The ground wires under a third. It looks like more wires than you expected, but the principle is the same: same color, same nut.

Before putting the nut on, give the wires a gentle clockwise pre-twist using needle-nose pliers. This isn’t required, but it gives the spring inside the nut more to grip and produces a tighter, more reliable connection — especially worth doing if you’re new to this.

Place the wire nut over the exposed copper ends and twist it clockwise with firm, steady pressure. You’ll feel resistance build as the spring engages. Keep twisting until the nut is snug, no bare copper is visible below the bottom edge of the nut, and the nut doesn’t wobble when you wiggle it.

Now test it: grip each wire individually and give it a firm tug. A correctly installed wire nut does not release any wire. If a wire pulls free, unscrew the nut, check that the wires are stripped evenly and aligned properly, and do it again. Wire nuts cost almost nothing. A connection that fails inside a closed ceiling costs significantly more.

One optional finishing touch: wrap a single layer of electrical tape around the base of the nut and the wires just below it. This isn’t required by code, but it adds peace of mind — particularly when you’re folding the wires back into a ceiling box and pushing the fixture up against it.

🚫 The Mistakes That Make Connections Fail

Wrong size nut is the most common problem. Too large and the spring can’t grip the wires; too small and it won’t thread on properly. Match the nut to the wire gauge listed on the package.

Uneven strip lengths cause one wire to be gripped firmly and the other barely at all. The shorter wire is the one that pulls free during the tug test. Strip them to the same length before you start.

Leaving bare copper visible below the nut after installation means the strip was too long or the nut is too small. Trim the wires slightly or move up a size.

Reusing cracked or old wire nuts is never worth it. Wire nuts are inexpensive. A fresh nut on every connection is the right call.

🛒 Gear Worth Having

Secmity 122-Piece Wire Connector Assortment Kit — 5 Sizes, Color-Coded — Five sizes covering the full range of residential wire gauges, organized in a labeled storage box. This is the kit that ends the size guessing game permanently. Buy it once, have the right nut for every job.

Klein Tools NCVT1P Non-Contact Voltage Tester — The tool you hold near the wires before you touch anything. Green light means it’s working; red light and a beep means the power is still on and you need to find the right breaker. Klein has been making professional electrical tools for over 160 years. This one costs less than fifteen dollars and earns its place in every toolbox.

WAGO 221 Lever-Nut Assortment Kit (78-Piece, with Case) — The modern alternative to twist wire nuts. Flip the orange lever up, insert the stripped wire, push the lever down. No twisting required, works with both solid and stranded wire, and fully reusable — flip the lever back up and the wire pulls free cleanly. Professional electricians reach for these. Worth knowing they exist.

VCELINK Automatic Wire Stripper and Cutter — Self-Adjusting, 28-10 AWG — The self-adjusting jaw finds the right strip depth on its own, so you get a clean, even strip every time without nicking the copper. Even strip lengths are the foundation of a wire nut connection that actually holds.

As an Amazon affiliate, I earn from qualifying purchases. Thank you for supporting SkippityWhistles.

📖 Related Reads

Ron Screwstrip now owns an assortment kit, a voltage tester, and a firm policy about the tug test. The ceiling fixture went up on a Saturday afternoon and has been working quietly ever since. He doesn’t think about it anymore. That’s exactly how it’s supposed to go.

SkippityWhistles is part of the John D Reinhart content family. Writer, illustrator, videographer, and accidental filmmaker — find the whole story at JohnDReinhart.com.

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How to Use a Power Drill (And Why the Settings Actually Matter)

A power drill is the first real tool most people buy — and the one they use forever. Here’s what the controls actually do, and why it matters before you touch the trigger.

Ron Screwstrip bought his first power drill on a Tuesday. By Wednesday he had stripped three screw heads, cracked a piece of pine he was particularly fond of, and drilled a pilot hole at an angle that could only be described as “optimistic.” By Thursday he had read the manual.

This post is the manual, translated into English.

A power drill is the first real tool most people buy — and the one they use forever. The difference between a drill that fights you and a drill that works is almost never the drill itself. It’s knowing what the three controls actually do before you squeeze the trigger.

🔧 The Three Controls You Need to Understand

Most beginners find the trigger and the direction switch and call it a day. The third control — the torque clutch — is the one that prevents stripped screws, cracked wood, and the particular frustration of a screw that goes in sideways.

The torque clutch is the numbered ring around the chuck. It controls how much rotational force the drill applies before it clicks and stops. A low number means the drill stops driving early — gentle, precise, for small screws and soft materials. A high number means more force before it stops — for longer screws, harder materials, and situations where you need the screw firmly seated.

If the drill clicks and stops before the screw is flush, increase the torque setting. If the screw is going in crooked or stripping, lower the torque and slow down. Most jobs land somewhere in the middle of the numbered range.

The gear selector (usually marked 1/2 or L/H) controls speed. Low gear is for driving screws — more torque, more control, less likely to strip. High gear is for drilling holes — faster rotation, less torque. Switch between them based on what the drill is doing, not what feels faster.

The direction switch controls forward and reverse. Forward for driving and drilling. Reverse for backing out stuck screws or extracting a bit that’s bound up in the material. Find it before you need it — the moment a bit jams is a bad time to go looking.

📐 Bit Basics: What Goes In and Why

Drill bits make holes. Driver bits drive screws. They are not interchangeable, and the reason most screws get stripped is a driver bit that doesn’t fit the screw head properly.

For screws: the bit should fit snugly into the screw head with no wobble. A loose fit is how you round off a Phillips head in three seconds flat. If the bit skips and chatters when you apply pressure, it doesn’t match the screw — find the right bit before you drive it, not after.

For pilot holes: use a drill bit slightly smaller than the screw’s shaft. The pilot hole gives the screw a path to follow so it doesn’t split the wood or wander. For hardwood, drywall, or anything where you’re driving near an edge, pilot holes are not optional.

Insert the bit fully into the chuck — centered between the jaws — and tighten until firm. A bit that wobbles in the chuck will wobble in the material. Tighten more.

✅ How to Actually Use It

Hold the drill straight. This is the instruction most people acknowledge and then ignore. A drill that tilts off-axis drives the screw at an angle, which means the screw head ends up proud (sticking above) of the surface, which means you’re backing it out and starting over. Some drills have a small bubble level in the body — use it.

Squeeze the trigger gently and let the tool build speed before applying pressure to the material. Don’t push — the weight of the drill provides enough force for most jobs. Forcing it is how bits snap and screws strip.

For drilling holes: back the bit out occasionally to clear debris. For longer holes, do this every inch or so. A clogged flute (the channels in the drill bit ) is the reason holes burn instead of cut.

For driving screws: stop when the clutch clicks or when the screw head is flush with the surface — whichever comes first. Going past flush means going into the material, which weakens the hold and looks wrong. Once is usually enough to learn this lesson.

⚠️ Safety Basics

Eye protection, every time. Drill bits generate chips and the occasional fragment that travels faster than you’d like. Safety glasses cost less than an eye.

Secure the workpiece with clamps whenever possible. A board that shifts mid-drill shifts the hole location with it. Clamps are cheaper than restarting.

Remove the battery when changing bits. The trigger is easy to bump accidentally when your other hand is inside the chuck. Remove the battery first. Do it every time until it’s a habit.

If a bit jams, reverse direction and back it out gently. Don’t force a jammed bit forward. The bit is cheaper than the wrist.

🛒 Gear Worth Having

DEWALT 20V MAX Cordless Drill Driver Set (DCD771C2) — Two batteries, charger, contractor bag. The benchmark for beginner to intermediate home DIY. Consistent power, reliable clutch, built to last a decade of weekend projects.

RYOBI ONE+ 18V Cordless 1/2 in. Drill/Driver Kit (PCL206K1) — The honest entry-level pick. Compatible with the entire RYOBI ONE+ battery ecosystem, which matters when you eventually add a circular saw or reciprocating saw. Solid performance for the price.

AVID POWER 20V Cordless Drill Set — Battery, charger, and 22 bits included. The budget option that doesn’t feel like one. Good torque range, solid chuck, comfortable grip. The right first drill for someone who isn’t sure yet how much they’ll use it.

As an Amazon affiliate, I earn from qualifying purchases. Thank you for supporting SkippityWhistles.

📖 Related Reads

Power Drivers vs Impact Drivers

The DIYer’s Toolbox

How to Choose the Right Screwdriver

Ron Screwstrip now reads the manual first. His pilot holes are straight. His screws sit flush. He still occasionally drives one in at an angle, but he no longer blames the drill.

SkippityWhistles is part of the John D Reinhart content family. Writer, illustrator, videographer, and accidental filmmaker — find the whole story at JohnDReinhart.com.

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