During the electrical component of a home inspection often reveals electrical defects or deficiencies the homeowner was unaware of. What type and how many differ greater in importance and safety.
To understand the electrical panel, service and service equipment such as  over current devices, ground fault protection, and branch circuits are dependent the home inspector, the tools & equipment he utilizes, and his/her understanding electrical systems and how they operate & function.
By testing/analyzing branch circuits at outlets can/may allow a home inspector to determine the condition of that branch circuit and make valuable recommendations.

Analyzing electrical service and equipment.

Outlet/receptacle branch circuit analyzers, such as the type we use during a typical home inspection, allow the condition of that branch circuit to be revealed.
Common yet defective conditions might be:
1: Open Hot. The "hot" wire (usually/typically black) not actually being hot.
2: Open neutral: The white, usually not so white in older home's, the(neutral) wire, is not connected well somewhere.
3: Open Ground: An open is likely often the case of someone never connected a ground wire to the receptacle, or there was no ground to connect.
4: Poor ground impedance.Grounding the electrical service, the electrical system, is to provide a low impedance path for fault or transient currents into the earth.
5: False grounds.
False ground are common during our electrical surveys. A home owner adding an outlet in a bed room mismanages the wire on the outlet.
6: Missing ground. 
Missing ground are suspect in older updated homes.
7: Missing ground fault protection.
In short, missing ground fault protection.
A (GFCI) outlet / receptacle is electronic equipment protection device. It protects the occupants from the effects of ground faults which are dangerous.
The National Electrical Code® (NEC® ) has specific ground fault equipment protection requirements in 215.10, 230.95, 240.13 and 517.17. Ground fault relays (or sensors) are used to sense low magnitude ground faults.
8: Low voltage availability under load.
A bad connection or a broken wire somewhere.
9: High ground-to-neutral voltage.
Mis-wired receptacles. 120V receptacles wired incorrectly...
home inspection circuit analyzing
reversed hot/neutral


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