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What is the difference between ac ground and dc ground In your project iam using both ac and dc supply can both the grounds or the return paths be connected?
Wiki User
∙ 10y ago
In principle you can use a common wire for ac and dc in a low voltage low power circuit, for example 12 volts at up to about 20 watts. If the ac is at a power-supply voltage it must use separate wiring to comply with safety standards.
In low-power dc equipment like radios it is normal to use a step-down transformer with the ac live and neutral connected to the primary, and the earth connected to the transformer case, the chassis and one side or other of the dc supply taken from the secondary via a rectifier and smoother.
Wiki User
∙ 10y ago
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