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Old 04-17-2016, 06:03 AM   #1
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Wire size

Framing/Wiring up small stationary trailer. Installing converter to run all 12v lighting . What gauge wire should be used ? Also can standard wall switches (110v) be used on 12v lighting ?

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Old 04-17-2016, 08:59 AM   #2
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Google dc wire size chart.

A switch is a switch. If it is rated for more voltage and amperage than you will be using, then it's fine.

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Old 04-17-2016, 02:13 PM   #3
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I recommend using 12 gauge wire for all circuits of 20-amps or less. Use 10 gauge for 20-30 amps.

Regular 120VAC light switches can be used on DC circuits up to approximately 30VDC. AC and DC switches have different voltage ratings depending upon the internal construction features of the specific switch. AC switches that have no DC voltage rating need to be derated by 75% to work safely on DC.
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Old 04-18-2016, 06:55 AM   #4
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General wiring code for AC is; 30 amp -- 10 gauge would be used for your power cord
20 amp -- 12 gauge
15 amp ---14 gauge

12 volt circuits depends on your current draw. Use LED lights, more efficient, more $$.

110 volt wall switches are OK but why not go to your local RV parts place and buy 12 volt switches. they are smaller and take up less space.
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