Installation Techniques Flashcards
7 cards from real AEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Installation Techniques flashcards as text
When installing overhead ground wires (OGWs) on a transmission line, what is the primary function they serve?
Answer: Provide a low-impedance path to intercept lightning and shield phase conductors
Overhead ground wires intercept lightning strokes before they hit phase conductors and provide a return path for the surge current to ground.
What type of connector is used to make a mid-span tap connection from a distribution primary conductor to a transformer without cutting the main conductor?
Answer: Parallel groove (PG) clamp
A parallel groove (PG) clamp grips onto the main conductor without cutting it, allowing a branch conductor to be tapped off for the transformer.
When stringing conductors across a highway or railroad right-of-way during transmission line construction, what temporary structure is typically used to maintain required clearances?
Answer: Wooden H-frame structure with conductor rollers
Temporary H-frame structures with conductor rollers elevate conductors to maintain required crossing clearances while stringing operations proceed.
When bonding metallic conduit to an equipment grounding conductor, what is the required characteristic of the bond?
Answer: It must be permanent and have sufficient ampacity to safely carry fault current
Equipment grounding bonds must be permanent, secure, and sized to carry the maximum available fault current until the overcurrent device operates.
What is the correct torque specification practice when installing high-voltage bolted bus connections in a substation?
Answer: Use a calibrated torque wrench to the manufacturer's specified foot-pound value
Manufacturer-specified torque values ensure proper contact pressure without crushing bus material or under-clamping, which would increase resistance.
When installing a new underground residential distribution (URD) cable, what is done at the cable ends before pulling to prevent moisture ingress during installation?
Answer: Cable ends are sealed with end caps until termination is made
End caps seal the cut cable ends against moisture wicking into the conductor strands and insulation during storage and pulling.
When installing distribution transformers on a three-phase bank in a delta-wye configuration, what must be verified about each transformer's polarity markings before energizing?
Answer: The H1 and X1 polarity marks must be connected consistently to achieve the correct phase relationship and avoid circulating currents
Incorrect polarity connections in a three-phase bank create voltage mismatches that drive large circulating currents and can destroy the transformers.