hey guys
I have a simple question for you and i bet it has a simple answer. I was wondering how you determine the amp draw from low voltage (DC) lighting. If W=VA then A=W/V. Assuming a PF of 1 what would be the amp draw from 120 watts of low voltage lighting on a 12V DC transformer? (120V AC input, 12V DC out) Mainly wondering if you use 12V or 120V as the value for voltage in the equation. Got thinking about it at work and couldn't decide. Could have used the amp clamp but that would have been cheating.
I have a simple question for you and i bet it has a simple answer. I was wondering how you determine the amp draw from low voltage (DC) lighting. If W=VA then A=W/V. Assuming a PF of 1 what would be the amp draw from 120 watts of low voltage lighting on a 12V DC transformer? (120V AC input, 12V DC out) Mainly wondering if you use 12V or 120V as the value for voltage in the equation. Got thinking about it at work and couldn't decide. Could have used the amp clamp but that would have been cheating.