Busbar Study guides, Class notes & Summaries

Electrician NCCER Questions and Answers Already Passed Which article of the NEC covers grounding? Article 250 What is a dropout plate? Metal plate with a curve surface for cable to follow as it passes from the tray All of the following are common service voltages in the United States Except: 372/575 3-Phase, 4-wire What does a GFCI breaker do? Opens a circuit to prevent operation of an electrical device What will happen when one or more coils in a winding are grounded? The motor will automat...

The electrical NCCER test Questions and Answers 100% Accurate Which Article of the NEC covers grounding? article 250 Which of the following is a 90 degree, explosion proof fitting? GUAL What is a dropout plate? Metal plate with a curved surface for cable to follow as it passes from the tray All of the following are common service voltages in the United States EXCEPT: 372/575 3-PHASE, 4-WIRE What does a GFCI breaker do? Opens a circuit to prevent operation of an ...

Master Electrician Q%A VERIFIED TEST | ALREADY PASSED Where a 90 ampere, 240-volt, single-phase load is located 225 feet from a panelboard and is supplied with size 3 AWG copper conductors, determine the approximate voltage drop on the conductors. (K = 12.9) - ANSWER 10 volts Wiring methods associated with solar photovoltaic (PV) systems shall not be installed within _____ of the roof decking or sheathing except where directly below the roof surface covered by PV modules and associ...

Professionalism - ANSWER-the competence or skill expected of a professional (How you look, sound, and feel) Actions of a professional - ANSWER-Refrain from acts that cause background checks, time management, avoid arguments, park appropriot, do not steal time Principle of transmission - ANSWER-The movement of information in either analog or digital form through copper conductors and fiber strands AC - ANSWER-Alternating current Analog signal - ANSWER-A signal in the form of a wave us...

AHIT Electrical, Unit 5 Exam Questions and Answers adapter -Correct Answer-A device with a 3-slot receptacle for an appliance plug and a 2-prong plug for inserting into a 2-slot outlet. AL -Correct Answer-A rating indicating that breakers are approved for use with aluminum branch circuit wiring. alternating current -Correct Answer-an electrical current, used in homes, in which electrons move back and forth at a frequency of 60 cycles per second. ampacity -Correct Answer-The number of amps...

A 150 kVA service transformer has a 480Y/277 volt 3-phase primary and a 208Y/120 volt, 3-phase secondary. What is the approximate full-load ampere rating of the primary of the transformer? - ANSWER-180 amperes Where a conductor is marked RHW-2 on the insulation what does the "-2" represent? - ANSWER-The conductor has a maximum operating temperate of 90 degrees C. For a grounded electrical system supplied by a feeder or branch circuit, the equipment grounding conductor shall be sized in a...

cwea Grade 4 Test Part 2 Questions And Answers Acid: - ANSWER- A substance which releases hydrogen ions when dissolved in water. Most acids will dissolve the common metals and will react with a base to form a neutral salt and water. An acid is the opposite of an alkali, has a pH rating lower than 7.0, will turn litmus paper red, and has a sour taste. Acidity: - ANSWER- The quantitative capacity of water or a water solution to neutralize an alkali or base. It is usually measured by t...

Master Electrician Q%A VERIFIED TEST | ALREADY PASSED Where a 90 ampere, 240-volt, single-phase load is located 225 feet from a panelboard and is supplied with size 3 AWG copper conductors, determine the approximate voltage drop on the conductors. (K = 12.9) - ANSWER 10 volts Wiring methods associated with solar photovoltaic (PV) systems shall not be installed within _____ of the roof decking or sheathing except where directly below the roof surface covered by PV modules and associ...

A 150 kVA service transformer has a 480Y/277 volt 3-phase primary and a 208Y/120 volt, 3-phase secondary. What is the approximate full-load ampere rating of the primary of the transformer? - ANSWER-180 amperes Where a conductor is marked RHW-2 on the insulation what does the "-2" represent? - ANSWER-The conductor has a maximum operating temperate of 90 degrees C. For a grounded electrical system supplied by a feeder or branch circuit, the equipment grounding conductor shall be sized in a...

The minimum size equipment grounding conductor for a 100 ampere, 120/240 volt single phase underground dwelling feeder whose ungrounded conductors have been increased in size from 3 AWG copper to 1 AWG copper is __ AWG copper Ampacities, Grounding 250.122(B) Table 250.122 Table 8 Ch 9 - ANSWERS4 The continuity of the grounded conductor shall depend on a busbar or __ only. Continuity, Grounded conductors 200.12 - ANSWERSwire. Each multi-wire branch circuit shall be provided with...