I know y do it , but why !

STRAIN RELIEVE ALL wire where it enters or exits a portal.

Garden Grade RV manufacturers use solid wire because they would kill for a nickel. That's only one of a hundred things they el-cheap sleaze on. 90 degree flex solid wire a hundred times and see what happens

The next time your stick and brick HOUSE hits a rough stretch of pavement, let me know.

The new marine code

black/white/green for AC

red/yellow for DC.

Eliminates confusion when encountering a black wire.

Tin plating RHEE-tards corrosion it does not eliminate it.

wanderingbob wrote:
When running alternating current you run solid wire , when running direct current you run stranded . Why ?

Stranded wire has more capacity and better heat resistance than solid wire so you can get away with slightly smaller wire. I'm currently wiring a new 40x42 building with all stranded wire.

Solid wire, being stiffer, is more likely to work loose at connections due to it's movement while traveling.

MEXICOWANDERER wrote:
Visit a plant that manufactures electrical wire. Solid wire is much less expensive to manufacture.

THIS !

MEXICOWANDERER wrote:
The limpness (of silicon insulated wire) allows for almost impossibly tight routing.

The "limpness" of silicone is for TWO reasons. First, the insulation is very flexible, but more importantly, most silicon insulated wire uses finer stands/higher strand count. Both of these increase the cost.


Seeing as we are talking about wire, on DC circuits, I highly recommend using "marine", pre-tinned wire. It cuts down on corrosion.

wanderingbob wrote:
The reason that I was curious was because I need to run a 20 amp , 12 volt circuit about 15 feet and I have some 12 ga romex , sounds like that might work !
thank ya'll

Yes it will work. Although a repair tech could be misled to think romex is 120vac and reconnect to higher voltage.

I would use more customary primary wire for 12 volts.

http://www.genuinedealz.com/marine-wire/marine-primary-wire

wanderingbob wrote:
The reason that I was curious was because I need to run a 20 amp , 12 volt circuit about 15 feet and I have some 12 ga romex , sounds like that might work !
thank ya'll

I used some for 12v and joined the green ground wire to one of the others making that path two wires in parallel and the other a single. You are allowed to have one 12v path, neg or pos, with more R than the other because it is a circuit. It is the total R that counts.

The reason that I was curious was because I need to run a 20 amp , 12 volt circuit about 15 feet and I have some 12 ga romex , sounds like that might work !
thank ya'll

I've run into boat wire in some high quality rigs, nice stuff for 120 vac runs, stranded, tinned wires.
http://www.bestboatwire.com/marine-wire/flat-triplex-ac-boat-wire/12-awg-triplex-ac

I have a lot of solid 12 volt wire in this RV. Most of the lights are fed by solid.

12 volt is common in automobiles where you have lots of vibration.

120 volt in houses that do not move down the freeway at 65mph

But I have both stranded and solid in the motor home. On both 12 and 120 volt.

Not really. Wire that flexes gets stranded. Like a 120vac extension cord. Fixed wire tends to be solid. Large wire tends to have some stranding for flexibility. Can you imagine 4/0 solid copper :E