26209 2.1 to 5.0 Review

NCCER 2020 figure 23 how many grounding wires can be terminated to a metallic box ? 15

1

Where a main bonding jumper is required , the jumper must be at least what percentage of the largest phase conductor

12.5 %

Supply - side bonding jumper

A conductor in stalled on the supply side of a service or within a service equipment enclosure ( s ) , or for a sepa rately derived system , that ensures the required electrical conductivity between metal parts re quired to be electrically connected .

Grounding conductor

A conductor used to a wiring system to a grounding electrode or connect equipment or the grounded circuit of electrodes

Grounding clip

A listed spring clip used to secure a bonding conductor to an outlet box

Supplemental electrode

An additional elec trode ( commonly a driven rod or pipe ) required where the primary electrode is an underground metal water pipe in direct contact with the earth

Effective ground fault path

An intentionally constructed permanent , low - impedance electri cally conductive path designed and intended to carry current under ground - fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent pro tective device or ground - fault detectors on a high impedance grounded system

The main bonding jumper that is provided with the equipment is rated for the size of what ?

Conductor

What does E.G.C. stand for

Equipment Grounding Conductor

The G.E.C. is the sole connection between the grounding electrode & the grounded system conductor . What is full name ?

Growding Electrode Conductor

What are the 2 main purposes of the grounded or neutral conductor

It permits utilization of power at line - to - neutral voltage . This will allow the current - carrying conductor to carry any unbalanced current .

What are the 2 main purposes of the grounded or neutral conductor

It provides a low - impedance return path for the flow of fault current to the source to facili tate the operation of the overcurrent devices in the circuit .

Equipment grounding covers what

Metallic non current Carrying parts of an electrical System

They are bonded together to ensure what

Operation of Overcurrent devices in case Of ground faults

What determines the size of the ( EGC)

Over current devices that is protecting that particular system

This continuity between______ ____ __________ must be maintained by bonding

Service equipment and enclosures

Where is bonding jumper for a multiple service located ?

Supply Side of the Service disconnect

Where in the main panel does the grounding electrode conductor get connected ?

System Neutral conductor

What NEC table is used to determine the size of the EGC

T250-122

Where do you find the sizes for service conductors NEC2017 ______ NEC 2020_______

T310.15 ( B ) & 310.16

Main bonding jumper

The connection between the grounded circuit conductor and the equip ment grounding conductor at the service

What kind of a connection should be made to a non-metallic nail on device box?

Wire nut with only one wire going to ground terminal

If 2 or more cables enter a non - metallic box each of the equipment grounding wires must be

connected together with an approved Connector (wire nut) One wire must be attached to the grounding terminal on the receptacle

What is the key to clearing successful ground - fault currents

electrical continuity

What is used to secure the equipment grounding conductor to a metallic outlet box ?

granding Clip or grounding Screw

If the neutral is not needed for voltage requirements, but should be done

it still must be run to the service and connected to the grounded electrode conduc tor and equipment grounding conductor at the service