Residential Electrical Services
In a noncumbustible wall, the outlet box may be recessed________________.
1/4 inch
The general lighting load in a residence is 3,600VA at 120V. What is the amperage?
Amperage=Lighting Load/Voltage
The minimum number of small appliance circuits required by the NEC in a kitchen area is______________.
two
Three-way switches are used to control lamps from______________different locations.
two
Electric ranges, clothes dryers, and water heaters that operate at 240V require a________________circuit breaker.
two pole
A duplex receptacle outlet must be installed in all hallways longer than______________feet.
10
Service drop conductors must be at least____________________feet above the ground or other accessible surface at all times.
10
The minimum service disconnecting means for one-family dwelling is_____________.
100 A
When sizing electrical services, at what percentage is the first 3,000V A rated?
100%
When sizing the general lighting load for electric services, what percentage is the first 3,000VA rated at?
100%
A single-pole GFCI breaker is rated at______________.
120 VAC
Type SE cable is available with___________for interior wiring systems.
An insulated grounded conductor.
Type Ser cable may be used____________.
As a subfeed under certain conditions.
In a residential electric service, the service can be grounded to the underground gas piping system.
False
Type NM Cable may not be used in____________.
Shallow chases of masonry, concrete, or adobe.
In general, there are two basic methods used in the majority of modern residential Electrical systems. What are they?
Sheathed Cables of two or more conductors; raceway conduit systems
Type MC cable may not be used_____________.
Where subject to physical damage.
In a standard 125V receptacle, which wire is connected to the brass terminal?
the Ungrounded conductor
A service conductor without an overall jacket must have a clearance of not less than___________above a window that can be opened.
three feet
NEC Section 230.6 considers conductors installed under at least___________inch(es) of concrete to be outside the building.
two