Voltage report using a Sola Basic autoformer
Hi, First test of a Sola Basic autoformer on August 5th, 2016 starting at 2:30 p.m. The unit cost was $232.50 Canadian dollars. I added a #10 shore power cord, a 30 amp RV outlet, a 15 amp femal...
Forum Discussion
pianotuna wrote:
On a thirty amp shore power supply, before the air conditioner was started voltage was 115. Without the autoformer it dropped to 105, when air was turned on.
The equipment was 60 feet of #10 cord into a 30 amp outlet ...
A voltage drop of 10 volts over just 60' of 10 gauge main service cable is excessive with just the A/C as a load and would suggest inadequate source wiring feeding the source box. For example, with an unloaded source input voltage of 115 vac and an assumed load of 15 amps you should see an average voltage drop of just 1.8 volts over 60' of 10 gauge main service cable.
Voltage Drop Calculator
