Services
A service disconnecting means is made up of six disconnects in separate enclosures grouped in the same location, it will have ____ number of main bonding jumpers required for the service.
What is 6?
A grounding electrode conductor connects a system grounded conductor, equipment, or both to a _________ or to a point on the grounding electrode system.
What is a grounding electrode?
This was the year Henry Miller died.
What is 1896?
The ____ provides the essential function of connecting the electrical system, equipment, or both to the earth.
What is grounding electrode?
The practical safeguarding of persons and property from hazards arising from the use of electricity is the purpose of this.
What is the NEC?
Where the utility transformer supplying a service is located outside the building, a ______ is required to be made outside a building or structure served by a grounded electrical service.
What is a grounding connection?
The amount of current present in a grounding electrode conductor during normal system operation is this way because the earth is a poor conductor and a high-impedance path for current.
What is low?
This was the year Local 68 was chartered in the IBEW.
What is 1898?
This is an unintentional, electrically-conducting connection between the ungrounded conductor of an electrical circuit and the normally non–current-carrying conductors, metal enclosures, metal raceways, metal equipment, or earth.
What is a ground fault?
Electricity is always trying to get back and return to this.
The main bonding jumper that is a wire type uses this NEC reference to size it.
What is 250.102(c)(1)?
This is the largest size required for a copper grounding electrode conductor that is connected only to a concrete-encased electrode.
What is 4 AWG?
This was the year Local 111 was chartered in the IBEW.
What is 1907?
This minimizes potential differences between conductive parts that are bonded together. It also safeguards against shock hazards, and, in many cases, ensures an effective path for ground-fault current.
What is bonding?
Electrons move on this part of a wire creating what we call electricity.
What is the outer edge?
The main bonding jumper in a service disconnecting means enclosure can be any of these.
What is a wire, green screw, or bus style connection?
These methods are permitted when a splice is made in a grounding electrode conductor.
What is exothermic welding, irreversible compression connections, or splices on busbars?
This term came from union members hiding this IBEW symbol on pins as small as a fly under their lapels to keep from being attacked by government union busters and company hired police officers.
What is the Bug?
This is the minimum length of contact that must be made with the earth in order for a metal in-ground support structure to qualify as a grounding electrode.
What is 10'?
This is the difference of electromotive force between two points, substances, or items.
What is voltage potential?
The sizing of grounding electrode conductors for alternating current (AC) systems is generally addressed in 250.66, and the sizing of equipment grounding conductors is generally addressed in 250.122. The sizing of grounded conductors, such as those covered by 250.24(D) where sized for a single raceway or cable, are generally addressed in this reference.
What is 250.102?
Where a grounding electrode conductor for a 4,000-ampere service is connected only to two ground rod electrodes, the grounding electrode conductor is not required to be larger than this.
What is 6 AWG copper?
This was the government commission from the state of Colorado tasked with the duty of stopping people from being able to quit an employer without government authorization and enforce this law with imprisonment and fines if caught quitting without permission.
What is Revised Industrial Commission of the 1920's?
A concrete-encased electrode can be created using 20 feet or more of bare copper not smaller than this.
What is 4 AWG?
This is used to verify the ABSENCE of voltage only, not to verify the presence of voltage.
What is a tik tracer, widow stick, or wiggy?