josephridolfi6986
Member
If a 10,000 watt heater rated for 240 volts is connected to 208 volts how many amps will the heater draw? What is the proper way to do this calculation?
If a 10,000 watt heater rated for 240 volts is connected to 208 volts how many amps will the heater draw? What is the proper way to do this calculation?
Using Ohms law determine the resistance of the heater at 240 and then apply that resistance to 208.
If a 10,000 watt heater rated for 240 volts is connected to 208 volts how many amps will the heater draw? What is the proper way to do this calculation?
The question was worded exactly this way. The question did not specify single phase or three phase. The answer choices were:
-28
-36
-42
-48
That was your own fault since you did ll the work. :happyyes:Ugh... did I somehow become your Homework Beeatch?
do you understand how he got the wattage or do you need help. Ohms law is the key.No this wasn't homework it was an actual exam question.
I am just trying to learn and understand how to do the question. I appreciate your help and your time to answer back!
Take the original information 10000 watt heater at 240 volts. In this case I x V = watts or I x 240 = 10000 and I = 41.7 amps.
The resistance of the heater R = V/I = 240/41.7 R = 5.75 ohms watts = I2 x R = 41.7 2 x 5.75 = 10000 watt
At 208 volts I = V/R = 208/5.75 I = 36.2 amps. At 208 volts the wattage = I2 x R = 36.2 2 x 5.75 = 7535 watts
watts = (V2/V1)2 x 10000 = (208/240)2 x 10000 = 7535 approx.
That's not the same as JR. Check it for correctness please.
Answer is 36 amps.
Thanks
Take the original information 10000 watt heater at 240 volts. In this case I x V = watts or I x 240 = 10000 and I = 41.7 amps.
The resistance of the heater R = V/I = 240/41.7 R = 5.75 ohms watts = I2 x R = 41.7 2 x 5.75 = 10000 watt
At 208 volts I = V/R = 208/5.75 I = 36.2 amps. At 208 volts the wattage = I2 x R = 36.2 2 x 5.75 = 7535 watts
watts = (V2/V1)2 x 10000 = (208/240)2 x 10000 = 7535 approx.
That's not the same as JR. Check it for correctness please.
Answer is 36 amps.
Thanks
The resistance for the heater is just that and it doesn't vary on voltage. The watts however with change with voltage not the ohms. Is that what you are asking?Why do you get to instert 5.75 (twice), is this a constant resistance?
The resistance for the heater is just that and it doesn't vary on voltage. The watts however with change with voltage not the ohms. Is that what you are asking?
LOL, yes I got lazy and didn't do it as I should have... shame shame. :ashamed: