Home Wiring Audit

Start your home wiring audit with a walk-through inspection. Check every outlet and switch: are faceplates cracked or missing? Does the outlet feel loose in the wall? Are there signs of arcing (black marks or melting around plug slots)? Insert a plug and check for a snug fit. Test every GFCI outlet by pressing TEST and confirming the RESET button pops out. Examine visible wiring in the basement, attic, and crawlspace—look for rodent damage, frayed insulation, or wires resting on sharp edges. Check light fixtures: are bulbs rated for the maximum wattage of the fixture? Note any extension cords used as permanent wiring (a code violation). Document everything with photos. This visual inspection catches obvious hazards that an electrician can then investigate further.

The breaker panel tells the story of your home electrical system. With the panel cover removed (best done by a pro), check for: corrosion or rust on breakers or bus bars, signs of overheating (brown or melted insulation), any breaker that does not sit firmly in the panel. Check that breakers are properly matched to wire gauge (15A for #14 wire, 20A for #12 wire, 30A for #10 wire). Verify that all circuits are labeled. Count the number of circuits—if every slot is full or there are double-tapped breakers (two wires under one screw), you need a subpanel or upgrade. Look for manufacturer labels—Federal Pacific and Zinsco panels are known hazards and should be replaced regardless of apparent condition.

A simple plug-in outlet tester ($10–$15 from any hardware store) checks for common wiring problems. Plug it into every outlet and note the indicator pattern. The correct pattern shows two amber lights (correct wiring). Common problems: open ground (no ground wire connected), open neutral (disconnected neutral wire), reversed polarity (hot and neutral swapped), and hot-ground reversed (a dangerous condition). Open ground means outlets are not grounded, posing shock risk for electronics. Reversed polarity can energize the screw shell of a lamp socket. Any fault found on the tester should be corrected by an electrician. Test all outlets, not just a sample—problems can be isolated to individual outlets.

The age of your wiring determines its safety and reliability. Knob-and-tube wiring (pre-1940s) lacks grounding, insulation degrades, and it cannot handle modern loads. Cloth-covered wiring (1940s–1960s) has fabric insulation that dries and cracks, creating short circuit risk. Aluminum wiring (1965–1973) requires special connections and CO-ALR devices. Modern Romex (NM-B cable) with PVC insulation is safer and more durable. Check the wire jacket for markings—NM-B means modern Romex. If the wire has no markings or is covered in cloth, the wiring is old and needs evaluation. Also check your service cable from the utility connection to the panel—old service cables can be undersized for modern 200-amp service.

A professional electrical audit goes deeper than a visual check. The electrician will: remove the panel cover and torque all breaker and bus connections to spec, test all GFCI and AFCI devices, check for shared neutrals (which cause nuisance GFCI tripping), inspect grounding electrode system (ground rods, water pipe bonds), test ground resistance, check for code violations (buried junction boxes, improper splices, unprotected Romex), and verify AFCI protection on required circuits. They will provide a written report with prioritized recommendations. Most audits find 2–5 issues in an average home. Budget $500–$2,000 for common fixes. The audit report is a valuable document for home insurance and future renovations.