Re: Mains installation in garden

["Karam Karam" <kzkaram@xxxxxxxxxxx>]

Yes I imagine 12V lead acid battery type replacement supplies might
be tuned to the 13.8V nominal full charge. I have seen some off the
shelf 13.5V supplies, but more common is 12 or 15V. However if you're
putting these in your own enclosure some open frame or DIN switch
mode units provide access to a +/-10% adjusting potentiometer. Switch
mode supplies are also good in terms of maintaining consistent
voltage over their rated current range.

Karam

--- In ukha_d@xxxxxxx, "Neil Wrightson" <neilw@...> wrote:
>
> Hi,
>
> 13.8v is a standard supply voltage, as this is what is normally
used to
> power two way radios such as CB radios, ham radios etc.
>
>
> Regards,
>
> Neil Wrightson.
>
>  -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx]On
Behalf Of
> rb_ziggy
> Sent: Saturday, 12 May 2007 4:01 AM
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Re: Mains installation in garden
>
>
>
> Fair point, drive with a slightly higher regulated supply and allow
> for the drop off. I think you can get 13.5V regulated so that may
> do the trick. Still have to be careful that the cable is thick
> enough to handle those amps though!
>
> The site selling the garden lights had stuff on the effect of
> voltage drop off on brightness. I think it showed an exponential
> drop off of brightness with voltage drop hence the reason not to
> overextend the LV runs.
>
> --- In ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com, "Karam
> Karam" <kzkaram@> wrote:
> >
> > Richard,
> >
> > Purely from a theoretical standpoint :-) : You'll always get some
> > voltage drop and who's to say the supply is exactly 12V? So one
> thing
> > to check is what is the minimum/maximum acceptable working
voltage
> > for the lights (are they really so fussy?)since you might even
> > consider going to a slightly higher supply voltage.
> >
> > Karam
> >
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>