EEP Unit 6 TEST
A(An) _____ THHN conductor is required for a 19.70A noncontinuous load if the ambient temperature is 75°F and there are nine current-carrying conductors in the raceway in a dry location.
12 AWG
What size THHN conductors are required to feed a 20A noncontinuous load when the conductors are in an ambient temperature of 120°F in a dry location? The circuit is protected with a 20A overcurrent device.
12 AWG
The ampacity of six current-carrying 4/0 XHHW aluminum conductors installed in a ground floor slab (wet location) is _____.
144A
The ampacity of 15 current-carrying 10 RHW aluminum conductors in a raceway in an ambient temperature of 75°F is _____.
16A
What's the ampacity of three current-carrying 10 TW conductors run in a cable located in an attic space where the ambient temperature reaches 120°F?
17.4A
What's the ampacity of nine 10 THW current-carrying conductors with on equipment grounding conductor in a PVC raceway located in an ambient temperature of 46°C?
18.4A
A 1,200A feeder is tapped (over 10 ft but less than 25 ft long) to supply a 225A main breaker panelboard having a 180A continuous load. What's the minimum size THHN copper feeder tap conductor that can be used?
600 kcmil
What size overcurrent device is required for a 45A continuous load? The circuit is in a raceway with 14 current-carrying conductors.
60A
A raceway contains the following: One 4-wire, multiwire branch circuit that supplies a balanced incandescent 120V lighting load; one 4-wire, multiwire branch circuit that supplies a balanced 120V fluorescent lighting load; two conductors that supply a receptacle; and one equipment grounding conductor. The system is 120/208V, three-phase. Taking these factors into consideration, how many of these conductors are considered current carrying?
9 Conductors
What's the ampacity of five 10 THWN-2 current-carrying conductors with an equipment grounding conductor in a PVC raceway located ½ in. above a roof, where the ambient temperature is 94°F?
18.56A
The ampacity for each of 10 current-carrying 6 THHW conductors installed in an 18-in. long conduit in a dry location having an ambient temperature of 39°C is _____.
68 A
A 2 TW conductor is installed in a location where the ambient temperature is expected to be 102°F. The temperature correction factor for conductor ampacity in this location is _____.
0.82
A 1,200A feeder is tapped (maximum of 10 ft in length) to supply a 100A main breaker panelboard having a total calculated load of 100A. What's the minimum size THHN copper feeder tap conductor that can be used when the terminals are rated 75°C?
1 AWG
A raceway contains eight current-carrying conductors. What size conductor is required to feed a 20A noncontinuous lighting load in a dry location?
12 THHN
A continuous load of 27A requires the circuit overcurrent device to be sized at _____.
35A
What's the ampacity of three 4 THHN current-carrying conductors in EMT located ½ in. above a roof, where the ambient temperature is 94°F?
55.1A
There's a total of nine 10 THW conductors in a raceway. The system voltage is 120/208V, three-phase. One conductor is an equipment grounding conductor; four conductors supply a 4-wire, multiwire branch circuit for balanced electric-discharge luminaires; and the remaining conductors supply a 4-wire, multiwire branch circuit for balanced incandescent luminaires. Taking all these factors into consideration, how many of these conductors are considered current carrying?
7 Conductors
A 65A continuous load requires a _____ overcurrent device.
90A
If the ambient temperature is 71°C, the minimum insulation temperature rating a conductor must have and still have the capacity to carry current is _____.
90°C
What's the ampacity of three 4 THHN current-carrying conductors in EMT located 1½ in. above a roof, where the ambient temperature is 94°F?
91.2A