Week 4 Definitions

Question 1

Disconnecting means

Answer 1

A device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply

Question 2

Feeder

Answer 2

All circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device

Question 3

Separately derived system

Answer 3

An electrical power supply output, other than a service, having no direct connection(s) to circuit conductors of any other electrical source other than those established by grounding and bonding connections

Question 4

Service

Answer 4

The conductors and equipment connecting the serving utility to the wiring system of the premises served

Question 5

Service conductors

Answer 5

The conductors from the service point to the service disconnecting means

Question 6

Service conductors, overhead system

Answer 6

The overhead conductors between the service point and the first point of connection to the service-entrance conductors at the building or other structure

Question 7

Service conductors, underground system

Answer 7

The underground conductors between the service point and the first point of connection to the service-entrance conductors in a terminal box, meter, or other enclosure, inside or outside the building wall

Question 8

Service drop

Answer 8

The overhead conductors between the serving utility and the service point

Question 9

Service entrance conductors

Answer 9

The service conductors between the terminals of the service equipment to the service drop, overhead service conductors, service lateral, or underground service conductors

Question 10

Service equipment

Answer 10

The necessary equipment, consisting of a circuit breaker(s) or switch(es) and fuse(s) and their accessories, connected to the serving utility and intended to constitute the main control and disconnect of the serving utility

Question 11

Service lateral

Answer 11

The underground conductors between the utility electric supply system and the service point

Question 12

Service point

Answer 12

The point of connection between the facilities of the serving utility and the premises wiring

Question 13

Transfer switch

Answer 13

An automatic or non-automatic device for transferring one or more load conductor connections from one power source to another

Question 14

Watertight

Answer 14

Constructed so that moisture will not enter the enclosure under specified test conditions

Question 15

Weatherproof

Answer 15

Constructed or protected so that exposure to the weather will not interfere with successful operation

Question 16

Wet location

Answer 16

A location that is one or more of the following:

(1) Unprotected and exposed to weather
(2) Subject to saturation with water and other liquids
(3) Underground
(4) In concrete slabs or masonry on direct contact with the earth

Question 17

Damp location

Answer 17

Locations protected from weather and not subject to saturation with water or other liquids but subject to moderate degrees of moisture

Question 18

Tap conductor

Answer 18

A conductor, other than a service conductor, that has overcurrent protection ahead of its point of supply that exceeds the value permitted for similar conductors that are protected as described elsewhere in 240.4 (240)

Question 19

Cutout box

Answer 19

An enclosure designed for surface mounting that has swinging doors or covers secured directly to and telescoping with the walls of the enclosure