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NEC 2017 Code Changes in Wiring and Protection

Quiz Questions

1.A new exception was added for identifying each ungrounded conductor for existing installations where
A voltage system(s) already exists and a different voltage system is being added
No voltage system already existed
2. New language added to clarify how measurements are to be determined for GFCI receptacle
The clarification should also be shown in Spanish
210.8 Ground-Fault Circuit-Interrupter Protection for Personnel. Ground-fault circuit-interrupter protection for personnel shall be provided as required in 210.8(A) through (D) (E). The ground-fault circuit interrupter shall be installed in a readily accessible location.
3. The GFCI requirements for receptacles at commercial/industrial applications have been expanded to recognize ground faults other than
15 and 20A 125-volt applications only.
15 and 20A 110-volt applications only.
15 and 20A 220-volt applications only.
4. GFCI protection for receptacles in non-dwelling unit crawl spaces
Has been added.
Has been omitted.
5. New requirement added for minimum rated
120-volt, 20-ampere branch circuit for dwelling unit garage receptacle
220-volt, 20-ampere branch circuit for dwelling unit garage receptacle
6.New provisions added
Not requiring AFCI protection for guest rooms/guest suites of hotels/motels.
Requiring AFCI protection for guest rooms/guest suites of hotels/motels.
7. The requirement for an individual branch circuit for electric vehicle outlets has been changed. An outlet(s) Each outlet installed for the purpose of charging electric vehicles shall be supplied by a separate an individual branch circuit. This Each circuit shall have no other outlets.
8. Fixed cabinets "that do not have countertops or similar work surfaces" was added as an item that will constitute a break in a wall space for receptacle spacing requirements at dwelling units.

Receptacle requirements for dwelling unit garages, basements, and accessory buildings expanded to two-family dwellings (not just one-family dwellings). For the 2017 NEC, this same level of electrical safety has been extended to two-family dwellings as it has been for one-family dwellings for the past 10 Code cycles. The purpose of this rule is to:

help prevent the use of extension cords as a substitute for permanent wiring, which often occurs when receptacle outlets are not readily available. When extension cords are used as a substitute for permanent wiring, they are often stretched through doorways, windows, and similar openings. This frequently leads to damaged cords and the creation of an electrical hazard. The same potential for creating a hazard occurs at a two-family dwelling as it does for a one-family dwelling
save electricity in the long run for two-family dwelling.

At least ________ receptacle outlet is required to be installed "in each vehicle bay" and not more than 1.7 m (51/2 ft) above the floor in dwelling unit garages.

11. The required receptacle outlets at electrical service equipment must be installed in an accessible location within 7.5 m (25 ft) of indoor electrical service equipment.
12. A new exception allows a portion of a feeder that is not connected directly to load terminations to have an allowable ampacity not less than the sum of the continuous load plus the noncontinuous load (rather than the noncontinuous load plus 125 percent of the continuous load). It also clarifies when correction factors are to be applied.
13. New vertical clearance of ___________added for overhead service conductors installed over railroad tracks.
7.5 m (24.5 ft)
10 m (32.6 ft)
14. The use of metal water piping or building steel as the first options as a grounding electrode system for a separately derived system has been removed.