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can somebody out there please tell me!!!!I have a doorbell transformer that is designed to transform 240v ac to 8v dc I get 4v on one pole of the dc sides to earth and the same on the other pole but when I test across the poles I dont get any volteage (why is this ?)
 
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Transformers don't change A/C to D/C. They change voltage. Typical home door chime transformer is 120v (nominal) primary, to 18 or 24v secondary. Secondary is A/C. VA is watts.
 
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russell said:
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can somebody out there please tell me!!!!I have a doorbell transformer that is designed to transform 240v ac to 8v dc I get 4v on one pole of the dc sides to earth and the same on the other pole but when I test across the poles I dont get any volteage (why is this ?)
Put your meter on AC measurement and try again!
 
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