Dennis,
This would mean no switch but wired directly to the aux battery and a good battery charger when on shore power. Got it. Thanks for the help.
Regards,
Dennis

Dennis Jowell
Scotch Hollow Farm
Newbury, Vermont 

> On Jan 27, 2015, at 11:36 PM, Dennis Haynes <d23haynes57@hotmail.com> wrote:
> 
> These detectors are not instant on devices. Typically they are wired to be
> powered on constantly. They should be on the same fuse (branch circuit) as
> interior lighting so that if there is a power supply issue it will be
> obvious. This is the same for RV's as well as home installations of smoke
> detectors. RVs will often have a house battery disconnect for long term
> storage. The power consumption of these appliances is very small. If you
> have proper power converter/battery charger and you store the van connected
> to shore power just leave it connected full time. 
> 
> Dennis
> 
> 
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Dennis Jowell
> Sent: Tuesday, January 27, 2015 3:18 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Install CO and Smoke detector
> 
> Good morning listers ,
> I wanted to install a co and smoke detector in my 1988 Westy. The detector
> is from Amazon :
> http://www.amazon.com/exec/obidos/ASIN/B005GSFUWE/sbw/
> 
> Hard wire it off the aux: battery but am a little confused on the wiring set
> up.
> I wanted to add a toggle switch to shut power off to the detector when the
> Westy is down for some time. Didn't want to run the battery down. 
> My thought process is :
> From battery, Red wire to +, then to fuse, then to toggle switch, then to
> detector.
> Black - to ground. Will the toggle work and save the battery in this
> configuration?
> Thanks for any suggestions
> 
> Dennis Jowell
> Scotch Hollow Farm
> Newbury, Vermont