Grounding and Bonding
Which of the following is the minimum size of a single supply-side bonding jumper for three metal raceways with 300 kcmil service conductors each?
What is 2 AWG
250.102(C)(1)
Overhead service-drop conductors must not be smaller than _____ in general.
What is 8 AWG copper, or 6 AWG AL
230.23(A)
The NEC is..
What is For the practical safeguarding of persons and properties
90.1(A)
______ is the conductors between the service equipment, a separately derived system, or other power supply and the final branch circuit overcurrent device:
What is a Feeder
Working space distances for enclosed live parts shall be measured from the _____ of equipment or apparatus, if the live parts are enclosed.
What is enclosure or opening.
What is the needed conductor size for GEC if a service is fed by three parallel sets of 400 kcmil conductors?
What is 3/0 AWG
250.66
The NEC specifies that a galvanized eye-bolt be installed NOT less than _____ above finished grade when used as a point of attachment for electrical service.
What is 10ft
230.26
Conductors are considered outside of a building when they are installed under not less than ——— of concrete beneath the building;
What is 2 in.
______ is the Overhead conductors between the utility electrical supply and the service point:
What is a service drop
For equipment rated 800 A or more, personal doors located less than _____ from the nearest edge of the working space must open in the direction of egress and have listed panic hardware:
What is 25ft.
110.26(C)(3)
If ground-fault protection is not provided, it is permitted to ground the meter enclosure to the ____________ conductor on the load side of the service disconnect for a building or structure when the meter enclosure is adjacent to the service disconnecting.
What is grounded
250.142(B)Exc 2
______ disconnects shall be permitted for each service permitted..
What is 4 to 6
230.71(B)
If the rock bottom is encountered, the grounding rod must be driven at an angle not less than ______ degrees from the vertical:
What is 45
What is an Outlet
What is a point on the wiring system at which current is taken to supply utilization equipment
The minimum acceptable space width of working space is ______:
What is 30 in
110.26(A)(2)
Underground metal water pipe is direct contact with the earth for ______ or more can serve as a grounding electrode:
What is 10ft
250.52
The disconnect can consists of upto ______ switches or circuit breakers mounted in a single enclosures, or in a group of separate enclosures:
What is 6
What is an inverter
What is equipment that changes dc to ac
Height of Working space
What is 6'7"
110.26(A)(3)
Insulated equipment grounding conductors _____ and larger can be permanently reidentified at the time of installation at every point where the conductor is accessible:
What is 4 AWG
250.119(A)
Given: The local utility company provides a 120/240 volt, single-phase electrical system to a one-family dwelling unit with a demand load of 200 amperes. What is the MINIMUM size of aluminum THW conductors required for this residence's service-entrance conductors?
What is 4/0 AWG
Section 310.15(B)(7)(1) permits one-family dwelling 120/240 volt, single-phase, service-entrance conductors to be sized at an ampacity of not less than 83% of the service rating. Therefore, 200 amperes x 83% = 166 amperes Table 310.15(B)(16) indicates size 4/0 AWG THW aluminum conductors with an allowable ampacity of 180 amperes should be selected for this dwelling.
Where the box opening is less than 8 in., length of free conductors must extend atleast _____ outside the box opening:
What is 3 in
300.14
What is Ground
What is the Earth
In specifying depth of workspace, condition 1 means...
What is Exposed live parts on one side of the working space and no live or grounded parts on the other side.
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110.26(A)(1)