Lesson 10 quiz

Which one of these is the correct way to figure 3 phase voltage for calculation purposes? (This example is the last step before figuring a service calculation.)

What is the voltage across an open switch when the voltage supplying the switch is 120v?

How many amps would a 100W light bulb draw on a 120v circuit?

Means shall be provided to disconnect _____ current carrying conductors of a wind electric power source.

Conductors and overcurrent protection for wind electric systems shall be calculated at no less than_____%.

Receptacles and temporary installations of the 15, 20, and 30 amp types that are not a part of the permanent wiring of the building shall have _____ protection.

What is the approximate area of a 2/0 XHHW Conductor?

What is the minimum burial depth for rigid metal conduit ran under a commercial parking lot that is subject to truck traffic?

What size copper equipment grounding conductor (EGC) would you select for a service with a 200 amp main breaker with 4/0 copper conductors?

What size copper grounding electrode conductor would you select when using a cold water pipe as the grounding electrode on a 200 amp main breaker with  2/0 copper service conductors?

What size copper supply bonding jumper would select for a 200 amp service with 2/0 ungrounded copper service conductors?

What size copper GEC would you select for a service with 200 amp over current protection and 3/0 copper service conductors?

What size copper grounding electrode conductor is required for a 200 amp service with 2/0 copper service conductors?

What size copper conductor would you select for 4 motors with FLC’s of 22 amps, 20 amps, 14 amps, and 10 amps terminating to 75 C terminals?

What size copper conductors would you select for 5 motors with FLC’s of 24 amps, 13 amps, 13 amps, 10 amps, 9 amps terminating to 60° C terminals?

What size copper conductors would you select for a 2 HP 230v AC single phase motor terminating to 75°C terminals?

What size copper conductors would you select for a 2HP 115v AC single phase motor terminating to 75°C terminals?

What size copper conductors would you select for a single phase motor with a nameplate rating of 26 amps that will run a draw bridge for only 5 mins at a time and terminating to 60 C lugs?

What is the full load current “FLC” of a 3 HP 230v AC single phase terminating to 75­ C terminals?

What is the voltage across a closed switch when the voltage supplying the switch is 120v?