NEC 230

The minimum point of attachment of the service-drop conductors to a building shall not be less than ____ above the finished grade.

10 ft.

Service lateral conductors that supply power to limited loads of a single branch circuit shall not be smaller than ____ AWG copper or ___ AWG aluminum.

10AWG copper or 8AWG aluminum

Service entrance conductors shall be sized not less than ____ percent of the continuous load, plus 100 percent of the noncontinuous load.

125 percent

Overhead service conductors to a building shall maintain a vertical clearance of final spans above, or within, ____ measured horizontally from the platforms, projection, or surfaces from which they might be reached.

3 ft.

Service conductors installed as unjacketed multi-conductor cable shall have a minimum clearance of _____ from windows that are designed to be opened, doors, porches, stairs, fire escapes, or similar locations.

3 ft.

Service cables mounted in contact with a building shall be supported at intervals not exceeding ___

30 in.

Underground copper service-lateral conductors shall not be smaller than ___ AWG copper.

4 AWG

Service drops installed over roofs shall have a vertical clearance of ___ above the roof surface, unless a lesser distance is permitted by an exception.

8 ft.

The minimum size service-drop conductor permitted is ___ AWG copper OR ___ AWG aluminum or copper-clad aluminum.

8AWG / 6AWG

Service-lateral conductors shall have _____

Adequate mechanical strength and sufficient ampacity for the loads calculated.

Addition services shall be permitted for different voltages, frequencies, or phases, or for different uses such as for

Different Rate Schedules

Overhead service conductor spans can be supported to hardwood trees. T/F

False

Where a raceway-type service mast are used, all raceway fittings shall be ____ for use with service mast.

Identified

A building or structure shall be supplied by a maximum of _____ service(s), unless specifically permitted otherwise.

ONE

Service conductors supplying a building or other structure shall not _____ of another building or other structure.

Pass through the interior.

Conductors other than service conductors shall not be installed in the same ___ in which the service conductors are installed.

Service raceway or Service cable

Additional services shall be permitted for a single building or other structure sufficiently large to make two or more services necessary if permitted by

Special Permission

Service conductors shall not be installed beneath openings through which materials may be moved and shall not be installed where they will obstruct entrance to these buildings' openings. T/F

TRUE

Where a building or structure is supplied by more than one service, a permanent plaque or directory shall be installed at each service disconnect location denoting all other services supplying that building or structure and the area served by each. T/F

True

wiring methods permitted for service-entrance conductors include ____

Type IGS, Rigid metal conduit, Electrical metallic tubing, Metallic wireways, Busways, Metallic auxiliary gutters, Rigid nonmetallic conduit (underground). Mineral insulated (metal sheathed cable), Flexible metal conduit (not over 6') see 230.43 amendments.

Conductors are considered outside a building when they are installed

Under not less than 2 in. of concrete beneath a building or structure, installed in a vault that meets the construction requirements of article 450, Within a building or structure in a raceway encased in not less than a 2 in thickness of concrete or brick.

Service-Drop conductors shall have ____

sufficient ampacity to carry the load AND adequate mechanical strength.

Where a service raceway enters a building or structure from a(n)______it shall be sealed in accordance with 300.5(G).

underground distribution system