Knoxville Home Inspection: Electrical Terms Explained

Electrical items show up in almost every home inspection report, and the terms can sound alarming. Here's what the common ones usually mean in Knoxville-area homes, many of which have wiring from several eras. Your inspector saw the house and is the best guide to your report; a licensed electrician can confirm and price repairs.

At the panel

Double tap — Two wires under one breaker screw that's only rated for one. A common, usually inexpensive fix.

Undersized service — A 60- or 100-amp service that may struggle with modern loads. See panel upgrades.

Missing knockouts / open slots — Openings in the panel cover that should be closed for safety.

Panel at end of life — An old or problematic panel the inspector recommends having evaluated.

Outlets and protection

Open ground — A three-prong outlet with no ground connected. See outlets and GFCI protection.

Reversed polarity — Hot and neutral wires swapped at an outlet. Simple to correct.

No GFCI protection — Missing ground-fault protection in kitchens, baths, garages, basements or outdoors.

No AFCI protection — Missing arc-fault protection, common in older homes built before it was required.

Wiring types

Knob-and-tube — Very old, ungrounded wiring. Insurers often ask about it. See rewiring older homes.

Aluminum branch wiring — Found in some 1960s and 70s homes; needs compatible devices or special connectors.

Amateur wiring — Splices outside boxes, loose cables or extension cords used as permanent wiring.

How serious is it?

• Monitor: older but functioning devices, labeling missing from the panel.
• Fix soon: missing GFCIs, open grounds, double taps, reversed polarity.
• Before closing: scorching, overheating, knob-and-tube in use, a failing panel.

For inspectors and agents

You're welcome to link this page for clients. Related: older home wiring in Knoxville · warning signs of electrical trouble · electrical inspections