Re: [A/S] 12v outlets

Hi Rick,

I have the Dometic CoolFreeze 35, and reading from the spec sheet:

12v = 6.0A
24v = 3.0A
120v=1.3 to 0.7A

There is an integrated multi-voltage power supply with a priority circuit for 120v. The integrated fuse is a 4A 250V.

I used it on the standard 12v outlets this fall and didn't notice any problems (well, I didn't burn down the coach anyway) but I'd appreciate any hints for wire gauge and sockets. At least if I hire an electrician I'll have the right parts and not rely upon what he can scrounge in his truck.

Anne in VA
On Mar 9, 2012, at 8:24 AM, Rick Kunath wrote:

> >> Thanks! The two outlets on the sides will be for small fans but
> >> the one in the middle is for a portable freezer (Dometic, size of a
> >> small cooler) and that one pulls some juice.
> >>
> >> Anne in VA
>
> The cigarette lighter socket has become a defacto standard for 12 volt
> power. But it is not an exceptionally good and reliable design for that
> purpose. It wasn't designed to be a high current connector.
>
> For high current and reliable connections, I have always used the
> standard Anderson Powerpole line of DC connectors. I have literally
> thousands of these in the field.
>
> These are designed in different sizes to allow for fusing and prevent
> plugging in high current devices into receptacles fused and wired for
> low current applications that would blow a fuse or have undersized wiring.
>
> http://www.andersonpower.com/products/standard-powerpole.html
>
> If you look around that site you will find wall jacks and bulkhead jacks
> including waterproof jacks.
>
> http://www.andersonpower.com/products/
>
> These plugs and jacks are absolutely the right way to do reliable high
> current DC connections. A lighter jack is not, and I'd argue that a high
> current drawn through a lighter jack is a fire hazard at least and hard
> on the device at best due to losses in the design of the plug and jack.
>
> And as always, size the wiring accordingly for low resistive losses with
> a high current device. This will be much larger wire gage than the
> sizing for a 125 volt AC circuit will specify. A lot larger.
>
> Rick Kunath
> WBCCI #3060
>

[Non-text portions of this message have been removed]

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