A suburban area is experiencing voltage drop issues on a 120/240V, 3-phase feeder. The total load is 1500kW. What is the maximum allowable voltage drop for this feeder, according to Article 220.61(A)?

Texas Master exam practice question · Feeders

A suburban area is experiencing voltage drop issues on a 120/240V, 3-phase feeder. The total load is 1500kW. What is the maximum allowable voltage drop for this feeder, according to Article 220.61(A)?

A5%
10%
C15%
D20%

Exam tip

Always consider voltage drop when designing and installing feeders to ensure proper operation of electrical equipment.

Why B is correct

The maximum allowable voltage drop for a feeder is determined by Article 220.61(A). For a 120/240V, 3-phase system, the maximum allowable voltage drop is 10% of the nominal voltage.

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A 480V, 3-phase feeder supplies a commercial building with a total load of 2000kW. What is the minimum overcurrent protection required for this feeder, according to Article 430.53(A)?
A high-rise office building has a 480V, 3-phase feeder that supplies a data center. The data center has a critical load of 500kW. What is the minimum overcurrent protection required for this feeder, according to Article 695.7(A)?
A public utility company is planning to install a new feeder cable. The cable will be routed through a tunnel that has a maximum allowable temperature of 75°C. What is the minimum temperature rating required for the feeder cable, according to Article 330.10(A)?
A residential building has a total of 30 lighting fixtures and 20 receptacle outlets. What is the minimum conductor size required for the feeder circuit, assuming a 120/240V, 3-phase system and a 0.7 service factor?
An industrial plant has a feeder circuit that operates at 600V, 3-phase. The maximum load is 1500kW. What is the minimum conductor size required for this feeder, considering a 0.85 service factor?

A suburban area is experiencing voltage drop issues on a 120/240V, 3-phase feeder. The total load is 1500kW. What is the maximum allowable voltage drop for this feeder, according to Article 220.61(A)?

A suburban area is experiencing voltage drop issues on a 120/240V, 3-phase feeder. The total load is 1500kW. What is the maximum allowable voltage drop for this feeder, according to Article 220.61(A)?

More Feeders questions