Hobby_Man22
Well-known member
Lets say a 240v clothes dryer info label says it pulls 24 amps. Does that mean it pulls 24 amps on each leg? Or 12 amps on each leg adding up to 24 amps total?
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Calculating voltage
- Thread starter Hobby_Man22
- Start date
AntonLargiader
Well-known member
It's 24A across the 240V. Still just 24A but twice the power as 24A @ 120V.
EDIT: you can think of it, loosely, as 24A flowing out of L1 and the same 24A flowing into L2. The two descriptions you gave could be confused with adding 24 and 24, or adding 12 and 12 to get 24, neither of which is the right way to think of it.
EDIT: you can think of it, loosely, as 24A flowing out of L1 and the same 24A flowing into L2. The two descriptions you gave could be confused with adding 24 and 24, or adding 12 and 12 to get 24, neither of which is the right way to think of it.
each leg , not combined. so each hot would need to be sized & protected for 24 amps ( in this case probably a 30 amp circuit )
OP
Hobby_Man22
Well-known member
It's 24A across the 240V. Still just 24A but twice the power as 24A @ 120V.
EDIT: you can think of it, loosely, as 24A flowing out of L1 and the same 24A flowing into L2. The two descriptions you gave could be confused with adding 24 and 24, or adding 12 and 12 to get 24, neither of which is the right way to think of it.
24A back and forth between the two lines? Hence alternating current?
AntonLargiader
Well-known member
Exactly.
justsam
Well-known member
Kirchhoff's first law. Thank of it as a series circuit with two components, a voltage source, and the load, (clothes dryer). Sum of current entering a junction is the same as current flowing out. In this case, the junction in question is the circuit breaker, 24 Amps in, and 24 Amps out.
wyliesdiesels
Well-known member
yeah its a balanced 24a load. 24a in 24a out