ET 26209

In a separately derived system supplied by a transformer, what does the supply-side bonding jumper connect?

• neutral bar to panel enclosure

• transformer housing to the panel ground bar

• neutral on the primary side to the equipment housing

• transformer neutral to the grounding electrode conductor

Which NEC Table is used to size service-entrance conductors in other than dwelling unit?

• NEC Table 225.3

• NEC Table 310.16

• NEC Table 490.24

• NEC Table 310.12(A)

Which of the following describes bonding?

• securing a system bonding conductor to an outlet box

• connecting to establish electric continuity and conductivity

• connecting to the ground or to a conductive body that extends the ground connection

• connecting the normally noncurrent-carrying metal parts of equipment together and to the system grounded conductor

Equipment grounding refers to connecting the normally noncurrent-carrying metal parts of equipment to the system grounded conductor and/or which of the following?

• each other

• the neutral conductor

• each subpanel

• the grounding electrical conductor

A ground fault is described as an unintentional: witch of the following?

• open connection between an electrical circuit or equipment and the earth

• electrical connection between any of the ungrounded conductors of an electrical system

• electrical connection between two or more of the equipment grounding conductors

• electrical connection between an ungrounded conductor in a circuit and the normally noncurrent - carrying metal parts

A system supplied by a transformer operating at less than 50v must be grounded if the supply voltage to the transformer EXCEEDS which of the following?

• 24v to ground

• 50v to ground

• 120v to ground

• 150v to ground

What is ensured by bonding together the metallic parts of an electrical system?

• the proper operation of motors and other circuit equipment

• there is no interruption of service in the event of a ground fault

• the electrical energy is not wasted by leaving the raceway system

• the proper operation of overcurrent devices in the event of a ground fault

Which of the following is true regarding when two or more equipment grounding conductors (EGC) enter an outlet box?

• both EGC's are directly connected to the grounding terminal on the receptacle

• the EGC's are connected using an approved method and pass through the box without connecting to the receptacle

• one EGC is attached to the box using a grounding clip and the other is connected to the grounding terminal on the receptacle

• the EGC's are first connected using an approved method, then one wire is connected to the grounding terminal on the receptacle

The size of which of the following determines the size of the equipment grounding conductor?

• largest conductor

• neutral conductor

• overcurrent device

• main bonding jumper

How many UNGROUNDED conductors must be taken from the first structure to where the service is located in the second structure when running 120V?

• 1

• 2

• 3