Residential Electrical Services
Questions & Answers
When sizing electrical services, at what percentage is the first 3,000V A rated? -
ANSWERS100%
A service conductor without an overall jacket must have a clearance of not less
than___________above a window that can be opened. - ANSWERSthree feet
NEC Section 230.6 considers conductors installed under at least___________inch(es)
of concrete to be outside the building. - ANSWERStwo
Type NM Cable may not be used in____________. - ANSWERSShallow chases of
masonry, concrete, or adobe.
Type MC cable may not be used_____________. - ANSWERSWhere subject to
physical damage.
Type SE cable is available with___________for interior wiring systems. - ANSWERSAn
insulated grounded conductor.
Type Ser cable may be used____________. - ANSWERSAs a subfeed under certain
conditions.
When sizing the general lighting load for electric services, what percentage is the first
3,000VA rated at? - ANSWERS100%
The minimum service disconnecting means for one-family dwelling is_____________. -
ANSWERS100 A
The general lighting load in a residence is 3,600VA at 120V. What is the amperage? -
ANSWERSAmperage=Lighting Load/Voltage
A single-pole GFCI breaker is rated at______________. - ANSWERS120 VAC
