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Posted by James on December 16, 2006, 3:05 pm
I have one 300 watt transformer. I want to feed 6, 50 watt bulbs.
the transformer has two outputs, to balance the load. So, I will be using
(2) 150 watt outputs.
So, on each circuit, I will have 3 fixtures, each using 50 watt bulbs.
What I am trying to determine is how to "balance" the fixtures. I know that
the fixture nearest the transformer would have the most voltage, and those
on the end, less voltage.
I want to keep the fixtures wired in parallell, so I don't want to use a
loop. I "think" that I may want to use a "T" hookup, where the
main feed goes out to a "T" , and the "T" feeds the three bulbs. But as
I say, I don't know how to "balance" this.
Some time ago I had a good website that had some diagrams of differenct ways
this can be done. I even went to the Malibu website, but could not find the
info I need.
Can anyone point me to a good website for this, or offer any advice ?
Thank you very much !!
--james--
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Posted by on December 16, 2006, 3:47 pm
James wrote:
> I have one 300 watt transformer. I want to feed 6, 50 watt bulbs.
>
> the transformer has two outputs, to balance the load. So, I will be using
> (2) 150 watt outputs.
>
> So, on each circuit, I will have 3 fixtures, each using 50 watt bulbs.
> What I am trying to determine is how to "balance" the fixtures. I know that
> the fixture nearest the transformer would have the most voltage, and those
> on the end, less voltage.
>
> I want to keep the fixtures wired in parallell, so I don't want to use a
> loop. I "think" that I may want to use a "T" hookup, where the
> main feed goes out to a "T" , and the "T" feeds the three bulbs. But as
> I say, I don't know how to "balance" this.
>
> Some time ago I had a good website that had some diagrams of differenct ways
> this can be done. I even went to the Malibu website, but could not find the
> info I need.
>
> Can anyone point me to a good website for this, or offer any advice ?
>
> Thank you very much !!
>
> --james--
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Posted by Charles Schuler on December 16, 2006, 5:16 pm
>
> I have one 300 watt transformer. I want to feed 6, 50 watt bulbs.
>
> the transformer has two outputs, to balance the load. So, I will be
> using (2) 150 watt outputs.
>
> So, on each circuit, I will have 3 fixtures, each using 50 watt bulbs.
> What I am trying to determine is how to "balance" the fixtures. I know
> that the fixture nearest the transformer would have the most voltage, and
> those on the end, less voltage.
>
> I want to keep the fixtures wired in parallell, so I don't want to use a
> loop. I "think" that I may want to use a "T" hookup, where the
> main feed goes out to a "T" , and the "T" feeds the three bulbs. But
> as I say, I don't know how to "balance" this.
>
> Some time ago I had a good website that had some diagrams of differenct
> ways this can be done. I even went to the Malibu website, but could not
> find the info I need.
Some points:
1/ Loading a 300W transformer to 300W is OK, IF the transformer is of decent
quality.
2/ The voltage drop can be ignored ... the fixture near or far will be close
to the same voltage (unless your system uses wire that is too small).
3/ Parallel is your only choice, unless you change the voltage ratings of
the loads. e.g., if the transformer secondary is 12 volts, and the bulbs
are 12 volts, then all of the bulbs must be wired in parallel.
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Posted by Steve Barker LT on December 16, 2006, 5:46 pm
We've found the best way to "balance" is to experiment with different
wattages of bulbs. Less watt bulbs near the source and bigger watt bulbs
farther away.
--
Steve Barker
>
> I have one 300 watt transformer. I want to feed 6, 50 watt bulbs.
>
> the transformer has two outputs, to balance the load. So, I will be
> using (2) 150 watt outputs.
>
> So, on each circuit, I will have 3 fixtures, each using 50 watt bulbs.
> What I am trying to determine is how to "balance" the fixtures. I know
> that the fixture nearest the transformer would have the most voltage, and
> those on the end, less voltage.
>
> I want to keep the fixtures wired in parallell, so I don't want to use a
> loop. I "think" that I may want to use a "T" hookup, where the
> main feed goes out to a "T" , and the "T" feeds the three bulbs. But
> as I say, I don't know how to "balance" this.
>
> Some time ago I had a good website that had some diagrams of differenct
> ways this can be done. I even went to the Malibu website, but could not
> find the info I need.
>
> Can anyone point me to a good website for this, or offer any advice ?
>
> Thank you very much !!
>
> --james--
>
>
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Posted by Charles Schuler on December 16, 2006, 6:18 pm
> We've found the best way to "balance" is to experiment with different
> wattages of bulbs. Less watt bulbs near the source and bigger watt bulbs
> farther away.
Nope. If the wires are big enough, the voltage is consistent near and far.
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