Inspecting Aluminum Wiring - InterNACHI
Aluminum wires are the color of aluminum and are easily discernible from copper and other metals. Since the early 1970s, wiring-device binding terminals for use with aluminum wire have been marked CO/ALR, which stands for “copper/aluminum revised." Look for the word "aluminum" or the initials "AL" on the plastic wire jacket.
Advanced Electrical Inspection Guide | The House of Horrors
A 30-amp (120-volt), single-pole breaker wired with #14 copper conductor is feeding a 2-pole (240-volt) switch for a swimming pool light. The #14 conductor is undersized for this application. The #14 conductor is rated for 15-amps maximum.
more circuits with #12 copper wire, which should have 20-amp protection. Large appliances, such as electric water heaters and central air conditioners, may require 30-amp service, which is normally supplied by #10 copper wire. If there were an electric range, it would require a 40-amp or 50-amp service with #6 copper wire. Identification. Each ...
Garage | The House of Horrors - InterNACHI
The bonding jumper shall be not smaller than 6 AWG copper wire or equivalent. The length of the bonding jumper between the connection to a has piping system and the connection to a grounding electrode system shall not exceed 75 feet (22,860 mm). NFPA 70 …
Plumbing Inspection Guide | The House of Horrors - InterNACHI
The bonding jumper shall be not smaller than 6 AWG copper wire or equivalent. The length of the bonding jumper between the connection to a has piping system and the connection to a grounding electrode system shall not exceed 75 feet (22,860 mm). NFPA 70 is the standard for bonding connections. OBSERVATION
Electrical Terms - InterNACHI
They used this knowledge to create the incandescent bulb, in which a current is applied to a highly resistant, ultra-thin filament, causing it to glow. Standard copper wires, unlike light bulb filament, have little electrical resistance. Yet, even copper wire can glow and start a fire when it is too resistant for the current running through it.
Inspecting Oversized "AC" Breakers on Small-Gauge Wires
a minimum 10-gauge wire (based on the minimum circuit ampacity), and; a maximum fuse or circuit breaker size of 50 amps (based on the nameplate data). If the inspector sees a 10-gauge wire connected to a 50-amp breaker at the panelboard, that seems to be an overfusing defect. The maximum OCPD on a 10-gauge wire should be 30 amps.
Plumbing Inspection Guide - InterNACHI House of Horrors
The bonding jumper shall be not smaller than 6 AWG copper wire or equivalent. The length of the bonding jumper between the connection to a has piping system and the connection to a grounding electrode system shall not exceed 75 feet (22,860 mm). NFPA 70 …
Common Electrical Conductor Types - InterNACHI
Romex™ is a common type of residential wiring that is categorized by the National Electrical Code (NEC) as underground feeder (UF) or non-metallic sheathed cable (NM and NMC).
Glossary of Home Inspection Terms - InterNACHI
ampacity: Refers to how much current a wire can safely carry. For example, a 12-gauge electrical copper wire can safely carry up to 20 amps. amperage: The rate of flow of electricity through wire measured in terms of amperes. anchor bolts: In residential construction, the bolts used to secure a wooden sill plate to a concrete or masonry floor ...