Symptoms
- Considering an offer on an older home
- General home inspection mentioned electrical items you don't understand
- Panel brand, wiring type, or amperage are unclear from the listing
Likely causes
- CommonOutdated panel brands with known reliability issuesCertain older panel brands have documented histories of breakers failing to trip properly.
- CommonInsufficient service capacity for modern usageHomes with 60–100 amp service may struggle with modern appliances, EV charging, or additions.
- PossibleOutdated wiring types like knob-and-tube or aluminum branch wiringThese affect both safety and insurability and were common in specific eras.
- PossibleDIY electrical work done without permitsUnpermitted work is more likely to have code violations or safety issues.
What to do
- Ask for the electrical panel's brand and amperage rating from the listing agent or inspection report.
- Ask specifically whether the home has knob-and-tube or aluminum branch wiring.
- Check the general inspection report for any mention of double-tapped breakers, missing grounds, or an outdated panel.
- Consider hiring a licensed electrician for a dedicated electrical inspection, especially on homes over 40–50 years old.
- Ask about permit history for any past electrical work, especially additions or panel upgrades.
- Factor potential panel upgrade or rewiring costs into your offer or negotiation if issues are found.
- Confirm smoke detectors, GFCIs, and AFCIs meet current expectations even if not strictly required for an existing home.
When to call a pro
Hire a licensed electrician for a dedicated electrical inspection on any older home, separate from the general home inspector, especially if red flags come up.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.