Article 230 Services Flashcards
True or False
A building or other structure served shall be supplied by only one service, no exceptions.
False
Article 230.2
Additional services shall be permitted to supply the following special conditions:
(1) Fire pumps
(2) Emergency systems
(3) legally required standby systems
(4) optional standby systems
(5) parallel power production systems
(6) systems designed for connection to multiple sources of supply for the purpose of enhanced reliability
Article 230.2 (A)
Additional services shall be permitted to supply the following special occupancies:
(1) multiple occupancy buildings where there is no available space for service equipment accessible to all occupants
(2) a single building or other structure sufficiently large to make two or more
Article 230.2 (B)
Additional services shall be permitted to supply the following special capacity requirements:
(1) where the capacity requirements are in excess of 2000A at a supply voltagr of 1000V or less
(2) where the load requirements are of a single-phase installation are greater than the serving agency normally supplies through one device
(3) by special permission
Article 230.2 (C)
True or False
Additional services shall be permitted for different voltages, frequencies, or phases.
True
Article 230.2 (D)
Conductors shall be considered outside of a building or other structure where;
(1) installed under not less than ____ of concrete beneath a building or other structure.
(2) installed in a building in a raceway encased in concrete or brick not less than ____ thick
(3) installed in conduit and under not less than ____ of earth beneath a building
(4) installed in RMC or IMC routed directly through an eave but not a wall of a building.
(1) 2”
(2) 2”
(3) 18”
Article 230.6
Conductors other than service conductors shall not be installed in the same service raceway or service cable in which the service conductors are installed except for:
Grounding electrode conductors, supply side bonding jumpers, and load management control conductors having overcurrent protection.
Article 230.7
Where a service raceway enters a building from an underground distribution system, it shall be ____
Sealed in accordance with 300.5(G)
Article 230.8
What is the minimum size for overhead service conductors?
8 AWG copper or 6 AWG aluminum or copper clad aluminum.
Article 230.23 (B)
Overhead service conductors shall have a vertical clearance above a roof of ____ and shall be maintained for not less then ____ in all directions from the edge of the roof.
8’ 3’
Article 230.24 (A)
Overhead service conductors shall have the following minimum clearances from final grade:
(1) ____ at the electrical service entrance to buildings and pedestrian walkways cabled together with a grounded bare messenger where voltage does not exceed 150V to ground
(2) ____ over residential property and commercial areas not subject to truck traffic where voltage does not exceed 300V to ground
(3) ____ over residential property and commercial areas not subject to truck traffic where voltage does exceed 300V to ground
(4) ____ over public streets, alleys, roads, parking areas subject to truck traffic on non-residential property, and cultivated lands
(5) ____ over railroad tracks
(1) 10’
(2) 12’
(3) 15’
(4) 18’
(5) 24’ 6”
Article 230.24 (B)
Service-entrance cables shall be supported by straps or other approved means within ____ of every service head, gooseneck or connection to raceway or enclosure and at intervals not exceeding ____
12” 30”
Article 230.51 (A)
What methods are used to prevent the entrance of moisture on on overhead service entrance conductors?
The use of service heads or goosenecks at the point of service-entrance connections and providing a drip loop on individual conductors located below the service head.
Article 230.54
