2-4-2

The size of the feeder wires is increased for a given load, the line voltage drop will ?

Decrease

The voltage drop on a 480 volt feeder circuit that supplies a transformer is 16 volts the complies with the NEC requirements

False

Voltage drop will ? If the current to the load is increased

Increase

The resistance of a 6,000 ft piece of 1/0 copper wire is ? (K for copper= 10.4; 1/0 wire = 105,600 CM)

0.59

The voltage drop in the conductors of a series street lighting circuit is 6,700 ft (combined length total) of 6 AWG copper wire that operates on 6.6 amps is ? (K for copper = 10.4; CM of 6 AWG copper= 26,240)

17.5

A distribution transformer delivers 248 volts at the secondary bushing while a few spans away the secondary voltage is 224 volts. The voltage drop between the two points is ?

24 v

The national electric code requires that cables and wires be chosen, so that the voltage drop from either feeder or branch circuits to the farthest out, it does not exceed ?

3%

The national electric code recommends that the combined voltage drop for branch circuits and feeder not exceed

5%

The voltage drop per thousand feet of 1 AWG copper wire (resistance = 0.154 ohms per 1,000ft) when 50 amps of current are flowing is ?

7.7 v

Two wires off a main feeder supply current to a transformer several spans away.

80 v / 2,360 v

Voltage drop will increase if ?

Length of wire is increased

The resistivity constant of a conductor is determined by the ?

Material from which the conductor is made

The formula used to determine the resistance of a conductor is R = ?

R=(KxL)/A

Line (voltage) drop is equip to the current through the line multiplied by the resistance of the line as expressed in the formula Eline=Iline x Rline

True

All cables and wires contain some resistance. When a current flows through them a ? Will occur

Voltage drop