NLC Electrical Grid Test 2 Questions with Verified Answers

What is service? - also low voltage but runs pole to customer or pedestal to customer. What is a loop feed design? - allows any section of cable or transformer to be taken out of service without affecting the adjacent customers and obtain a normal open. If you have voltages of 7200/12470 which voltage is phase to neutral? - the smaller voltage number. Why do customers prefer underground systems? - they cannot be seen. Underground systems remain how many times more expensive than overhead? - 4 times. Many cities have passed what? - ordinances requiring all new lines to be underground. What kind of pole remains most popular? - wood poles. The majority of distribution poles range from ___ to ___ feet. - 35-55 feet. Why are fiberglass poles good? - lightweight and easy installation. Insulators are made of? - polymer or porcelain. The pole mounted distribution transformer is the key element used to? - reduce the voltage level that can be used by customers. What is a fuse cutout switch and what are they used for? - protect equipment such as transformers and main line from the faults that occur. When a fault occurs, the fuse burns and the fuse holder automatically falls open. What is a re-closer? - re-closer can re-close the line after a temporary fault which minimizes outage time. Can do kit up to 4 times to determine if it is temporary or permanent. In line device.