These are not-so-easy, but also not-too-hard questions for you to try to answer and test your electrician skills. Whether you are a novice in a field of electrical engineering or a professional electrician, these questions will move your brain cells for sure! To check your results, take a peek for answers at the bottom of article.
Let’s start.
Question #1
Building “A” is supplied with 120/240 volt single-phase power from building “B” on the same property. “B” is supplied from a three-wire with two ungrounded conductors and one neutral without any metallic water pipe or other metal equipment connections to the building or equipment ground fault protection installed.
The neutral conductor must:
A. Not be connected to a grounding electrode in the second building
B. Not be connected to a grounding electrode in either building
C. Be bonded to the disconnect enclosure in the second building and connected to a grounding electrode
D. Tie into the ungrounded conductor of one of the buildings with a grounding jumper
Question #2
A feeder runs from one part of a building to another under the floor in two parallel sets of rigid non-metallic conduits with type RHW copper conductors size AWG #500 and is protected by 800 ampere fuses. It must have a minimum size copper equipment grounding conductor in each conduit run of no less than which of the following:
A. 1/0 AWG
B. 20 AWG
C. 10 amps
D. 5 AWG
These are not-so-easy, but also not-too-hard questions for you to try to answer and test your electrician skills. Whether you are a novice in a field of electrical engineering or a professional electrician, these questions will move your brain cells for sure! To check your results, take a peek for answers at the bottom of article.
Let’s start.
Question #1
Building “A” is supplied with 120/240 volt single-phase power from building “B” on the same property. “B” is supplied from a three-wire with two ungrounded conductors and one neutral without any metallic water pipe or other metal equipment connections to the building or equipment ground fault protection installed.
The neutral conductor must:
A. Not be connected to a grounding electrode in the second building
B. Not be connected to a grounding electrode in either building
C. Be bonded to the disconnect enclosure in the second building and connected to a grounding electrode
D. Tie into the ungrounded conductor of one of the buildings with a grounding jumper
Question #2
A feeder runs from one part of a building to another under the floor in two parallel sets of rigid non-metallic conduits with type RHW copper conductors size AWG #500 and is protected by 800 ampere fuses. It must have a minimum size copper equipment grounding conductor in each conduit run of no less than which of the following:
A. 1/0 AWG
B. 20 AWG
C. 10 amps
D. 5 AWG
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