can VD actually be measured at the end of a circuit while the amp load is on?Using a DMM. Is this a accurate way to measure for voltage drop?thankyou
- posted
17 years ago
voltage drop ?
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- posted
17 years ago
You can measure the voltage at each end of the loaded circuit and find the difference. Measuring at no load would be meaningless.
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- posted
17 years ago
What about measuring open-circuit voltage (no load) and then voltage under a known load? You can not only determine the voltage drop due to a reference load (e.g., 15 or 20 amps) but the circuit resistance as well. Isn't this pretty much what the Ideal testers do?
Chuck
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- posted
17 years ago
its easy to calculate vd = I*L*mV/A/m (mV/A/m = drop per amp per metre found in the regs book) ------------------- 1000
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- posted
17 years ago
--------- It comes to the same thing in theory but is more convenient (measuring at one point only) than my suggestion.