Electrical
Every page in this system is reviewed by a US-licensed electrician before publication. Outlets, switches, GFCI, breakers, and lighting are DIY-capable with correct precautions. Panel work is always pro-hire.
Overview
Residential electrical divides into: service (from the utility to your panel), distribution (breakers and branch circuits), and use (outlets, switches, fixtures, appliances). We publish DIY-capable content for the use side — replacing outlets, swapping switches, installing fixtures — after contractor review. We do NOT publish DIY content for the service or distribution side. That's licensed electrician territory permanently.
Every page in this section carries a reviewer credit: "Reviewed by [Name], licensed [role] in [state]." See Contractor Reviewer Credentials for the full roster and scope.
Most common fixes
The highest-search-volume issues in this system, each fully documented with safety-first framing, ranked causes, and cost estimates.
Sub-categories
Every corner of this system, organized by function. Click into any sub-category for the full fix and project inventory.
Outlets
Standard, GFCI, USB-integrated, tamper-resistant. Diagnostic sequences and safe replacement.
Switches
Single-pole, 3-way, 4-way, dimmers, smart switches. Safe replacement with power off.
Lighting
Ceiling lights, fixtures, ceiling fans, LED conversions, low-voltage.
Circuits & breakers
Diagnostic sequences for tripping breakers. Panel content is READ-only; replacement is pro-hire.
Safety devices
Smoke detectors, CO detectors, GFCI, AFCI. Testing, replacement, code requirements.
Wiring & code
Wire gauge, box fill, code overview. We do NOT teach wire pulling or new circuit installation.
Materials used in this system
Tools you'll need
Project cost guides
What we do NOT teach as DIY
Electrical topics that are always licensed-electrician-only:
- Panel work of any kind — breaker replacement, panel upgrades, sub-panel installation
- Service entrance work (from the meter to the main breaker)
- New circuit installation requiring wire pulling
- Generator transfer switch installation
- EV charger installation (unless replacing an existing 240V dryer or range outlet exactly)
- Any work on knob-and-tube or aluminum wiring beyond identifying it
- Work requiring a permit in your jurisdiction (most electrical does)
Frequently asked questions
Electrical work is high-consequence — the wrong instruction can kill someone or start a fire. Our review process ensures every DIY guide is technically correct and includes appropriate safety warnings. Reviewer name and license state visible on each page.
Yes, in most US jurisdictions, homeowners can do electrical work in their own primary residence — subject to permits and inspections. But 'legal' isn't 'safe' — DIY electrical work causes home fires when done incorrectly. If you're uncertain about any step, call an electrician.
Assuming a wire is dead based on the breaker label alone. Labels are often wrong or outdated. ALWAYS verify with a non-contact voltage tester at the specific wire you're about to touch. This one tool has saved countless lives — $15 well spent.
Knob-and-tube (pre-1950s wiring) works safely when undisturbed but degrades over time and doesn't accept modern loads. Insurance companies are increasingly refusing to cover homes with it. See our K&T identification page and plan for gradual replacement.