Forum Discussion
MEXICOWANDERER
Jul 11, 2013Explorer
Look, NEC ratings when dealing with 12 volts is about as relevant as Lewis Carroll's Alice In Wonderland when building a nuclear reactor.
Amperage ratings are calculated by WATTAGE, i.e. volt drop. You can drop voltage 10 percent in a DC 12-volt line and develop 5% of the heat as a similar percentage drop in a 120 volt AC line.
Here's another "ditty". Lost voltage means lost wattage. Calculate your lost (for example 3 amp hours a day) then multiply it by 365, a year's worth. Not so insignificant any more, is it? Saving ten dollars on wire can cost fifty dollars a year in power loss. Start those generators and converters!
Amperage ratings are calculated by WATTAGE, i.e. volt drop. You can drop voltage 10 percent in a DC 12-volt line and develop 5% of the heat as a similar percentage drop in a 120 volt AC line.
Here's another "ditty". Lost voltage means lost wattage. Calculate your lost (for example 3 amp hours a day) then multiply it by 365, a year's worth. Not so insignificant any more, is it? Saving ten dollars on wire can cost fifty dollars a year in power loss. Start those generators and converters!
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,187 PostsLatest Activity: Jan 14, 2025