12v wiring question?

[cpw]

I'm getting ready to run some of the 12v wiring in the new trailer and just want to make sure I'm doing everything right:

First up, a dedicated line to a 12v outlet that this will be plugged into: http://www.firecraft.com/product/bbq-guru-12-volt-dc-vehichle-adaptor-cord/low-dollar-accessoies

I don't see an amperage on there, so I'm not sure what gauge wire to use. Assuming the distance from the panel to the outlet is about 12', what gauge wire should I use?

2nd, I bought two of these flood lights: [ame="http://www.amazon.com/dp/B00CKIHT1S/ref=pe_385040_30332200_pe_309540_26725410_item"]Amazon.com: 2 × 27W 4" Square Flood Beam 60 degree LED Work Light Lamp Off Road High Power ATV Jeep 4x4 Tractor Truck Light: Automotive@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51FAnlaViBL.@@AMEPARAM@@51FAnlaViBL[/ame],
Each light says it's 2 amps at 12v. Assuming the same 12' distance to the fixture, this chart says I need 14 gauge wire. Is that correct?

Lastly, is it better to upsize than gauge than downsize? So for example, if I buy a roll of 10 gauge and use it for everything, will that be OK (assuming all of my lights are LED)?

Thanks for any help!

 

[Bludawg]

14 Ga is correct for Auxiliary low wattage lighting.

 

[Wolverine]

You are correct 10 gage at 12 feet will be fine , just don't under gage and make sure you have super good ground. Solder at every connection.

 

[cpw]

Thanks guys!

 

[Will work for bbq]

If your distance from source to load is 12' then calculate 24' total conductor length including the return. Don't forget to fuse at the source and it is always better to up size the wire than to down size it. The biggest issue with DC wiring is not the wires capacity but rather voltage drop for a given circuits wire size, length and load. That said 14 gauge is fine but personally I would run 12.

http://www.bulkwire.com/wireresistance.asp

 

[Randy3269]

If your distance from source to load is 12' then calculate 24' total conductor length including the return. Don't forget to fuse at the source and it is always better to up size the wire than to down size it. The biggest issue with DC wiring is not the wires capacity but rather voltage drop for a given circuits wire size, length and load. That said 14 gauge is fine but personally I would run 12.

http://www.bulkwire.com/wireresistance.asp

+1 Great ground is always a +. Solder and heat shrink all connections for years of trouble free service.