Grounded and Bonded
One or more metal in-ground support structure(s) in direct contact with the earth vertically for this distance or more, with or without concrete encasement is permitted to be a grounding electrode.
What is 10' ? 250.52(A)(2)
T/F Backfill used for underground wiring shall not damage raceways or prevent adequate compaction of fill or contribute to corrosion.
What is True? 300.5(F)
Boxes, conduit bodies, and fittings installed in wet locations shall be listed for use in wet locations.
What is 314.15?
Using the standard calculation method, the feeder demand factor for five household clothes dryers is this amount.
What is 85%? Table 220.54
Overhead service conductors installed over roofs shall have a vertical clearance of not less than this amount above the roof surface.
What is 8'? 230.24(A)
Metal raceways and enclosures for grounding electrode conductors shall be electrically continuous from the point of attachment to cabinets or equipment to the grounding electrode.
What is 250.64(E)(1)?
T/F Raceways may be supported by ceiling grids.
What is false? 300.11(B)
According to the NEC, the volume of a three inch by two inch by three and a half inch device box is this much.
What is eighteen cubic inches? Table 314.16(A)
Foyers with an area greater than this amount shall have a receptacle located in each wall space 3 ft or more in width unbroken by doorways, windows next to doors that extend to the floor, and similar openings.
What is 60 sq ft? 210.52(I)
Single-throw knife switches shall be installed so that this will not tend to close the switch.
What is gravity? 404.6(A)
A rebar-type concrete encased electrode installed in accordance with 250.52(A)(3) with an additional rebar section extended from its location within the concrete to an accessible location that is not subject to this shall be permitted for connection of grounding electrode conductors and bonding jumpers.
What is corrosion? 250.68(C)(3)
Where raceways are exposed to direct sunlight on or above rooftops, they shall be installed a minimum of this distance between the roof and the bottom of the raceway.
What is 7/8" ? 310.15(B)(2)
In installations within or behind noncombustible walls or ceilings, the front edge of a box, plaster ring, or extension ring shall be set back not more than this amount from the finished surface.
What is 1/4"? 314.20
In a dwelling unit, a receptacle is required in any space of this much or more in width (including space measured around corners) and unbroken along the floor line by doorways and similar openings, fireplaces, and fixed cabinets that do not have countertops or similar work surfaces.
What is 2' ? 210.52(A)(2)(1)
The standard ampere rating for fuses includes:
1A, 6A, 10A, 15A,
All of these, None of these.
What is All of these? 240.6(A)
A service is supplied by three metal raceways, each containing 600 kcmil ungrounded conductors. Determine the copper supply-side bonding jumper size for each service raceway.
What is 1/0 AWG? Table 250.102(C)(1)
Raceways and cables installed into the bottom of open bottom equipment shall/shall not be required to be mechanically secured to the equipment.
What is shall not? 300.12 Ex. 2
Ceiling boxes used for lighting shall be required to support a luminaire weighing a minimum of this amount.
What is 50 lbs.? 314.27(A)(2)
In addition to the number of branch circuits required by other parts of the Code, at least this many 120V, 20A branch circuit(s) shall be provided to supply the bathroom(s) receptacle outlet(s). Such circuits shall have no other outlets.
What is one? 210.11(C)(3)
The phase converter disconnecting means shall be readily accessible and located here from the phase converter.
What is in sight? 455.8(A)
A building or structure shall have the interior metal water piping system bonded with an equipment grounding conductor sized in accordance with this Table.
What is Table 250.102(C)(1)? 250.104(A)(3)
Where portions of a cable raceway or sleeve are subjected to different temperatures and condensation is known to be a problem, the raceway or sleeve shall be filled with this to prevent the circulation of warm air to a colder section of the raceway or sleeve.
What are sealants identified for use? 300.7(A)
The minimum size of a junction box with one 4" RMC entering one end and one 4" RMC leaving the opposite end, with the conductors spliced in the center, is this size.
What is 24" x 24"? 314.28(A)(2)
There shall be a minimum of this many receptacle(s) installed outdoors at a one-family dwelling and each unit of a two-family dwelling unit that is at grade level.
What is two? (one in the front and one in the back) 210.52(E)(1)
T/F An instantaneous trip is a function that causes a circuit breaker to trip with no intentional delay when currents exceed the instantaneous trip setting or current level. if arcing currents are above the instantaneous trip level, the circuit breaker will trip in the minimum possible time.
What is True? 240.87(B) Note 3