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I'm planning on installing a few 12v plugs/chargers to my camper van build - 2 of the Blue Sea USB charging ports, 2 of the cigarette lighter type ports, and also one of the Blue Sea LED voltmeters. The USB chargers will charge iPhones. The other plug may power a 19" 12v TV. Could all of these be wired together on one circuit? And if so, should they be wired in parallel?
 

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2014-159 HR in CT
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Could all of these be wired together on one circuit? And if so, should they be wired in parallel?
A single circuit can support lots of the USB ports. You might consider separate circuits for the 12V cigarette-type outlets... in most cars the lighter socket has a 10 amp separate fuse.

Yes, parallel in any case so each item gets 12V.

I would suggest that if your TV is permanently in the van, you might just hardwire it to a 12V source instead of using a cigarette-type outlet and plug. I put a switch inline with mine so it does not draw any power when the little red pilot light is on and the TV is in "standby".
 
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