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Electrical Level 3 Module 1 Exam 2025 Load Calculations and
Branch Feeder Circuits GRADED A+
For resistance welders, the rating for the overcurrent protection device should not exceed what percentage of the primary current rating of the welder?
300%
Show window lighting is calculated at 200VA per linear foot plus
125%
The allowable ampacity for eleven No. 12 THHN copper conductors in a cable must be adjusted by
50%
The load for 10' of multi-outlet assembly used to supply several loads simultaneously is
1,800VA
The maximum size dual-element fuse for a 40hp, 3Ø, 460V motor with a Design Letter D is
100A
What is the demand load for one household range with a nameplate rating of 11.75kW, 240V, 1Ø?
8kW
What is the current-carrying capacity for No. 6 THWN aluminum conductors in conduit run through an ambient temperature of 38°C?
44 Amps
What is the lighting load on a 120V circuit for six 100W incandescent lights and four fluorescent fixtures with a ballast rating of 1.5A, all operating continuously for 8 hours per day? 13.75A
13.75A
What is the load center distance for a 208V, four-wire, three-phase branch circuit with fixed noncontinuous loads from the source of 60A at 45', 40A at 60', 30A at 75', and 25A at 100'
63.55'
What is the load center length for a branch circuit consisting of noncontinuous loads of 125A at 80', 75A at 110', and 50A at 100'?
93'
According to the NEC®, the ampacity of branch circuit conductors must be derated when there are more than how many current-carrying conductors in a raceway?
3
13,750VA
What is the motor full-load current for a motor with a nameplate rating of 50hp, 460V, 3Ø?
65A
What is the required circuit ampacity of a noncontinuous, single-phase load of 8.5kW at 277V?
30.69A
What is the required circuit ampacity for a noncontinuous, three-phase load of 6kW at 208V?
16.65A
What is the total ampacity for a 120V branch circuit consisting of four duplex receptacles rated noncontinuous duty and six duplex receptacles rated continuous duty?
17.25A
What is the total load required by the NEC® for two appliance branch circuits plus a laundry branch circuit?
4,500VA
What is the voltage drop for a 120V, single-phase, two-wire branch circuit, 100' long, using copper conductors of 6,530 circular mils with a noncontinuous load of 13A? 5.14V
5.14V
What size copper conductor would be required for a 240V, 1Ø circuit supplying a noncontinuous load of 27.5A at a distance of 145', and a maximum voltage drop of 3%?
No. 10
When connected to 15A or 20A multi-outlet general-purpose branch circuits, which of the following shall not exceed 50% of the branch circuit ampere rating?
Fastened-in-place utilization equipment
What is the demand load for one household range with a nameplate rating of 11.75kW, 240V, 1Ø?
8kW
What is the lighting load on a 120V circuit for six 100W incandescent lights and four fluorescent fixtures with a ballast rating of 1.5A, all operating continuously for 8 hours per day? 13.75A
13.75A
16.65A
What is the total ampacity for a 120V branch circuit consisting of four duplex receptacles rated noncontinuous duty and six duplex receptacles rated continuous duty?
17.25A
What is the total load required by the NEC® for two appliance branch circuits plus a laundry branch circuit?
4,500VA
What size copper conductor would be required for a 240V, 1Ø circuit supplying a noncontinuous load of 27.5A at a distance of 145', and a maximum voltage drop of 3%?
No. 10
When connected to 15A or 20A multi-outlet general-purpose branch circuits, which of the following shall not exceed 50% of the branch circuit ampere rating?
Fastened-in-place utilization equipment
NEC 220.14 - each outlet has an assigned load of ___
180VA
NEC Table 310.16 covers conductors rated up to ___
0-2000V
NEC 220.14(I) each receptacle is assigned a value of ___
180VA
NEC 220.54 the load for household electric dryers must be calculated at ____ or ____
5000VA or the nameplate rating of the dryer — whichever is larger
When space heating equipment utilizes electric resistance heating elements, protection for the resistance elements shall not exceed 60A.
NEC 424.22(B)
If breaker is not sufficient to hold the starting current of the motor, the rating is permitted to be increased but cannot exceed ___ or the branch circuit selection current, whichever is greater.
225% of the motor rated load current
Show window loads are ___
Always continuous
NEC table 310.16 used to determine
Branch circuit conductor size
table 430.52 used for
Motor short circuit and ground fault protection
NEC section 630.32(A) is for resistance welders it provides the rating or setting for the over current protection device shall not exceed ___ of the welder
300% of the primary current rating
The reciprocal of 125% (1.25) is 1/1.25 which is equivalent to ___ at the over current protection device
80% of the rating
NEC 210.11(C)(2) and 210.52(F) require the installation of at least one receptacle to ___
Supply laundry equipment
NEC section 210.14 (H)(1) each ___ is considered as one outlet of at least 180VA capacity. In locations where many appliances are likely to be used at one time, each 1' of multi outlet assembly is considered as one outlet of at least 180VA capacity
5' of the multi outlet assembly
