Electrical Safety and Motor Starters Quiz

Minimum Distance for Communication Cables

• Communication wires and cables should be separated from service drops of electric light and power conductors by a minimum distance of 300 mm (1 foot).

WYE-DELTA Starter Wires

• A WYE-DELTA starter for a single voltage three-phase squirrel cage induction motor requires a total of 9 wires: 3 for the WYE connection, 3 for the DELTA connection, and 3 control wires for the starting sequence.

Disadvantage of Stranded Wires

• A disadvantage of stranded wires compared to solid wires of the same cross-sectional area is lower electrical conductivity. Stranded wires can also be less robust against physical stress and deformation over time.

Minimum Insulation Level for Neutral Conductors

• According to the Philippine Electrical Code (PEC), the minimum insulation level for neutral conductors in residential installations with solidly grounded systems is rated for at least 600 volts.

Test your knowledge of electrical safety and motor starters with this quiz. Answer questions about minimum distances for separating communication wires from electric conductors and the connection requirements for a WYE-DELTA starter for a three-phase induction motor.