6.A. How many grounded neutral conductors are in a 208Y/120 volt, 3-phase, 4-wire system? A. Three B. Two C. Four D. One 6.B. A separate building that's supplied with a feeder or branch service will also need a A. separate EGC from the supply EGC. B. transformer for isolation. C. neutral conductor bonded to ground. D. grounding electrode system.

6.A. How many grounded neutral conductors are in a 208Y/120 volt, 3-phase, 4-wire system? A. Three B. Two C. Four D. One 6.B. A separate building that's supplied with a feeder or branch service will also need a A. separate EGC from the supply EGC. B. transformer for isolation. C. neutral conductor bonded to ground. D. grounding electrode system.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter28: Overcurrent Protection–fuses And Circuit Breakers

Section: Chapter Questions

Problem 10R: Using the method shown in this unit, what is the approximate short-circuit current available at the...

See similar textbooks

Similar questions

If required, what type of diagram must indicate the calculated load, demand factors, conductor type and size, and area served? A. A transformer configuration B. A branch circuit mapC. An installation planD. A feeder diagram
Using the method shown in this unit, what is the approximate short-circuit current available at the terminals of a 50-kVA single-phase transformer rated 120/240 volts? The transformer impedance is 1%. a. Line-to-line b. Line-to-neutral
Referring to the transformer connection in Question 9, if the center tap of the primary is connected to a neutral conductor on the incoming power, will it permit the secondary voltages to be balanced when single-phase loads are added?
a. Where is the transformer in the residence mounted? _____ b. To which circuit is the transformer connected? _____
6.A three-phase transformer bank has the secondary connected in a wye configuration. The center tap is used as a neutral conductor. If the voltage across any phase conductor and neutral is 120 volts, how much voltage would be applied to a three-phase load connected to the secondary of this transformer bank?
Two different transformers details are tabulated below. Calculate the missed values in the table. Secondary terminal voltage of the second transformer is 487.5V when loaded. Determine the regulation of the transformer.?
3. Which transformer shown below is one that is enclosed in a metal cover?
Can you use the supply transformer size or information to determine the size of a standby generator to be used or install during load sheeding?
A 300-kilovolt-ampere transformer bank consisting of three 100-kilovolt-ampere transformers has a 3-phase, 480-volt delta primary and a 120/240-volt, 3-phase, 4-wire delta-connected secondary.For problems 1 through 4 show calculations and/or source of information. 3. What is the proper rating of the fuses to install for overcurrent protection of the secondary?
A transformer rated 1-kVA, 240/120, 50 Hz. Because of an emergency, the transformer has to be used on a 60 Hz system. If the flux density in the transformer core is to be kept the same at 50 Hz and 240 volts, what is the volt-ampere rating at 60 Hz?
The no-load and full-load secondary voltages of a transformer were found to be 117 and 113 volts, respectively. Calculate the per cent regulation. Ans.: 3.54%
Which transformer is used for welding application? Explain the operation in detail with diagram.