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OBJECTIVE 116.4 WORKSHEET
2-POLE
CB
J BOX
120/208 V
30, 4-W
PANEL K
Box Sizing and Series Circuits (Master Bedroom) 116-WBII
T4
T3
T2
mm
208 VOLTS
Figure 115.317 Line-to-Line
DUCT
HEATER
The duct heater contains two heating elements that are connected as shown. Each of the two elements is rated to
deliver 1850 watts when operated at 125 volts.
1. See Figure 115.317. The total current drawn by the duct heater when connected to the 208-volt circuit
is
amps.
a. 8.89
b. 15.42
c. 12.31
d. 16.89
e. 13.52

Respuesta :

s1llvrya
answer is A 8.89


formula: P = I/V
P = 1850 watts and V = 125 volts

I = 1850/125 = 14.8 amps

208 volts to order calculate the current drawn the duct heater on the 208-volt circuit
using this formula again I = P/V

I = 1850/28

I = 8.89 amps

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