electrical
問題一覧
1
Where more than one rod, pipe or plate electrode is used in one grounding system, each electrode shall be located a minimum of ___ from any other electrode of another grounding system.
6 ft
2
A plate electrode installed as a part of a grounding electrode system shall be located a minimum of ___ inches below the surface of the earth.
30
3
Where external to a building or equipment enclosure, an aluminum or copper-clad aluminum grounding electrode conductor shall be installed a minimum of __ from the earth.
18 inch
4
Unless the outlet box is identified and marked to indicate the maximum weight permitted to be supported, an outlet box in a wall may support a luminarie having a maximum weight of __ pounds.
50
5
Unless installed parallel to framing members, NM wiring run in an attic accessed by a portable ladder shall be protected from damage where located within __ of the nearest edge of the attic entrance.
6 ft
6
Cord_connecred luminaries, lighting track and pendants shall be located a minimum of __ horizontally and ___ vertically from the top of a bathtub rim or shower stall threshold.
3 ft, 8 ft
7
Direct burial conductors and cables emerging from the ground shall be protected by enclosures or raceways extending to a minimum height of ___ above finished grade or the point of entrance to the building.
8 ft
8
What is the maximum number of NO. 12 AWG conductors permitted for a 4 inch by 1 1/2 inch standard round metal box not marked with a cubic inch capacity.
6
9
Noncombustible surfaces that are broken or incomplete shall be repaired so that gaps or open spaces at the edge of a panel board employing a flush-type cover are a maximum of __ inch in size.
1/8
10
A grounding ring can be used as a grounding electrode if located a minimum ___ inches below the earth and at least ___ feet of bare copper wire no smaller than ___ AWG is used.
30, 20, 2
11
A trash compactor appliance listed to be connected with a flexible cord shall have a minimum length of ___ inches and a maximum length of ___ inches.
36, 48
12
In general, which of the following colors must the insulation be on ungrounded conductors.
none of the listed
13
Boxes installed in openings of noncombustible surfaces with a flush-type cover or faceplate shall have no gap greater than ___ inch around the edge of the box.
1/8
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11問 • 1年前問題一覧
1
Where more than one rod, pipe or plate electrode is used in one grounding system, each electrode shall be located a minimum of ___ from any other electrode of another grounding system.
6 ft
2
A plate electrode installed as a part of a grounding electrode system shall be located a minimum of ___ inches below the surface of the earth.
30
3
Where external to a building or equipment enclosure, an aluminum or copper-clad aluminum grounding electrode conductor shall be installed a minimum of __ from the earth.
18 inch
4
Unless the outlet box is identified and marked to indicate the maximum weight permitted to be supported, an outlet box in a wall may support a luminarie having a maximum weight of __ pounds.
50
5
Unless installed parallel to framing members, NM wiring run in an attic accessed by a portable ladder shall be protected from damage where located within __ of the nearest edge of the attic entrance.
6 ft
6
Cord_connecred luminaries, lighting track and pendants shall be located a minimum of __ horizontally and ___ vertically from the top of a bathtub rim or shower stall threshold.
3 ft, 8 ft
7
Direct burial conductors and cables emerging from the ground shall be protected by enclosures or raceways extending to a minimum height of ___ above finished grade or the point of entrance to the building.
8 ft
8
What is the maximum number of NO. 12 AWG conductors permitted for a 4 inch by 1 1/2 inch standard round metal box not marked with a cubic inch capacity.
6
9
Noncombustible surfaces that are broken or incomplete shall be repaired so that gaps or open spaces at the edge of a panel board employing a flush-type cover are a maximum of __ inch in size.
1/8
10
A grounding ring can be used as a grounding electrode if located a minimum ___ inches below the earth and at least ___ feet of bare copper wire no smaller than ___ AWG is used.
30, 20, 2
11
A trash compactor appliance listed to be connected with a flexible cord shall have a minimum length of ___ inches and a maximum length of ___ inches.
36, 48
12
In general, which of the following colors must the insulation be on ungrounded conductors.
none of the listed
13
Boxes installed in openings of noncombustible surfaces with a flush-type cover or faceplate shall have no gap greater than ___ inch around the edge of the box.
1/8