Ground-Fault Circuit Interrupters (GFCIs)

by Nick Gromicko and Ethan Ward What is a GFCI? A ground-fault circuit interrupter, or GFCI, is a device used in electrical wiring to disconnect a circuit when unbalanced current is detected between an energized conductor and a neutral return conductor.  Such an...

Inspecting Aluminum Wiring

Written by Nick Gromicko and Kenton Shepard Between approximately 1965 and 1973, single-strand (solid) aluminum wiring was sometimes substituted for copper branch-circuit wiring in residential electrical systems due to the sudden escalating price of copper. After a...

TPR Valves and Discharge Piping

Written by Nick Gromicko and Kenton Shepard Temperature/pressure-relief or TPR valves are safety devices installed on water heating appliances, such as boilers and domestic water supply heaters. TPRs are designed to automatically release water in the event that...

Ungrounded Electrical Receptacles

by Nick Gromicko (Copyright of InterNACHI) Grounding of electrical receptacles (which some laypeople refer to as outlets) is an important safety feature that has been required in new construction since 1962, as it minimizes the risk of electric shock and protects...