210 Branch Circuits
Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect all __ conductors at the point where the branch circuit originates.
ungrounded--NEC 210.4 B
Unless otherwise specified, for purposes of calculating branch-circuit and feeder loads, __ system voltages of 120V,120/240V,208Y/120V,240V,347V,480Y/277V,480V, 600Y/347V, and 600V shall be used.
nominal---NEC 220.5A
If necessary to meet capacity requirements, additional services are permitted for a single building or other structure by __ .
special permission---NEC 230.2 C 3
Circuit breakers and switches containing fuses shall be readily accessible and installed so the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than __ above the floor or working platform.
6ft7in.--NEC 240.24 A
For grounded systems, the earth __ considered an effective ground-fault current path.
shall not be-NEC 250.4 A 5
Where a different nominal voltage system is added to a premises wiring system that has branch circuits supplied from more than one nominal voltage system to a(an} __ installation, branch-circuit identification is only required for the new one.
existing ----NEC 210.5 C 1 EX
When calculations in Article 220 result in a fraction of an ampere that is less than __ , such fractions can be dropped.
0.5---NEC 220.5B
Vegetation such as __ shall not be used for support of overhead service conductors or service equipment.
trees---NEC 230.10
Overcurrent protection shall be provided in each ungrounded circuit conductor and shall be located at the point where the conductors receive their __ except as specified in 240.21 (A) through (H).
supply---NEC 240.21
__ on equipment to be grounded shall be removed from contact surfaces to ensure electrical continuity.
Paint or Lacquer or Enamel any of these.- NEC 250.12
If two or more branch circuits supply devices or equipment on the same yoke or mounting strap, a means to simultaneously disconnect the ungrounded supply conductors shall be provided __ .
at the point where the branch circuits originate ---NEC 210.7
For dwelling unit load calculations in accordance Article 220, the branch-circuit load for one 10-kW range is __ .
8kW---NEC 220.55 note 4
Overhead service conductors installed over roofs shall have a vertical clearance of not less than above the roof surface.
8ft 6in.---NEC 230.24 A
When feeder taps not over 10 ft long leave the enclosure in which the tap is made, the ampacity of the tap conductors cannot be less than __ of the rating of the device protecting
the feeder.
one-tenth---NEC 240.21 B 1, 4
Ungrounded alternating-current systems from 50V to 1 OOOV or less that are not required to be grounded in accordance with 250.21 (B) shall have _ _ .
ground detectors installed for ac system operating at not less than 120V and at 1 OOOV or less, and have the ground detection sensing equipment connected as close as practicable to where the system receives its supply--NEC 250.21 B 1 & 2
A receptacle supplying only a permanently installed
premises __ shall be permitted to omit ground-fault circuit interrupter protection.
security system or fire alarm system --- NEC 210.8 A EX2
For dwelling units, the calculated floor area for the general lighting load shall not include __ .
open porches or Unfinished area not adaptable for future use or unoccupiable space. --NEC 220.5C
The requirement to maintain a 3-foot vertical clearance from the edge of a roof does not apply to the final conductor span where the service drop is attached to __ .
the side of a building---NEC 230.24 A Ex 4
Ground-fault protection of equipment shall be provided for solidly grounded wye electrical systems of more than 150 volts-to-ground, but not exceeding 1 000V phase-to-phase for each individual device used as a building or structure main disconnecting means rated __ or more, unless specifically
exempted.
1000A---NEC 240.13
Where the supply conductors are larger than 1100 kcmil copper or 1750 kcmil aluminum, the main bonding jumper shall have an area that is __ the area of the largest phase conductor when of the same material.
not less than 12½ percent of--NEC 250.28 D1 & Table 250.102 C 1 Note 1
. In dwelling units, GFCI protection shall be provided for 125V through 250V receptacles installed in areas with sinks and permanent provisions for __ .
food preparation or beverage preparation or cooking ---- NEC 210.8 A 7
Applying a demand factor of 75 percent to the nameplate rating load of four or more appliances rated ¼ hp or greater, or 500 watts or greater, that are fastened in place, and that are served by the same feeder or service in a one-family, two-family, or multifamily dwelling shall be permitted. This demand factor shall not apply to __ .
1-House hold cooking equip, fastened in place, or 2-Cloths dryers or 3- Space heating equipment or 4-Air conditioning equipment or 5- Electric Vehicle Supply Equipment
NEC-220.53, 1-5
The minimum size service-drop conductor permitted is __ copper or _ _ aluminum or copper-clad aluminum.
8 AWG, 6 AWG--NEC 230.23 B
The next higher standard rating overcurrent device above the ampacity of the ungrounded conductors being protected is permitted to be used, provided the __ .
conductors being protected are not part of a branch circuit supplying more than one receptacle for cord-and-plug connected portable loads and ampacity of the conductors does not correspond with the standard ampere rating of a fuse or circuit breaker and next higher standard rating selected does not exceed 800A---NEC 240.4 B 1,2 & 3
If a building or structure is supplied by a feeder from an outdoor separately derived system, a system bonding jumper at both the same point as the
source and the first disconnecting means shall be permitted if doing so does not establish a(an) __ path for the grounded
conductor.
parallel--- NEC 250.30 A1 Ex 2--