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To answer this question a voltage is needed. I = 20/E.

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Each device powered by the transformer will have a rating of draw also in VA. So many for a t-stat, so many for zone valve or damper etc... add em up, make sure transformer is over and you re good. 20 VA is not very big. door bell Transformers are around that size. most hvac systems need 30, 50, 70 or more VA.

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Q: How many amps will a 20VA transformer provide?
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Related questions

How many amps can a 250 va transformer carry?

A transformer is a power source. It will provide voltage to a device. Find the voltage rating on the device, say 24V. 250/24 = ~10A.


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You have not provide enough information. You don't explain what 0.05 references. You need to know the secondary voltage and resistance to calculate current.


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The amps you can get from a 500 kVA transformer would depend on the voltage of the transformer's output. To calculate amperage, you can use the formula: Amps = Power (kVA) / Voltage. For example, if the output voltage is 480V, you would get approximately 1041 amps (500 kVA / 480V).


How many amps does a 600 watt low voltage transformer box pull?

The transformer itself does not pull current. Whatever you connect to the transformer pulls current. Whatever the output voltage of the transformer is, divide that into 600 and you get maximum current possible without burning up the transformer. At 24V that's 25 amps.


How many amps will a 10 kva transformer handle?

It depends on how many amps it was designed for. A 12.5kV/600v 10kVA 3 phase transformer can handle ~.5 amps on the primary and ~10A on the secondary. A 600/120V 10kVA 3 phase transformer can handle ~10A on the primary and ~50 on the secondary.


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It depends on the rated voltage of its secondary.


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To calculate the amperage in the secondary side of a transformer, you can use the formula: Amps = kVA / (Volts x Sqrt(3)). For a 250 kVA transformer with a 220-volt secondary, the amperage will be approximately 660.4 Amps.


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The formula you are looking for is I = W/E. Amps = Watts/Volts.


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