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BIGHEAVY
07-01-2008, 03:26 PM
hello all
quick question, 300 watt transformer one run of 4 12v wash lights 35w approx 60 ft and one run of 2 12v wash lights 35w and one 12v spot 35w approx 40 ft. this comes to 245 watts will 12/2 be ok as from what i have read it says 12/2 up to 240 watts total.

thank you:)

JoeyD
07-01-2008, 03:52 PM
12/2 is good for 240w at 100% which according to the NEC you should never exceed 80% of the wires capacity. Therefore your 12/2 cable is only good for 192w. I would suggest splitting the run into 2 runs.

Let me know if you have any other questions!

Pro-Scapes
07-01-2008, 05:00 PM
like Joey said you gotta split it to 2 or more runs. You would be risking melting that wire down.

Also its going to depend on how you have this wired up. If you have it all daisy chained your going to be disapointed in the performance and the voltage drop you have. 2 to 3 runs depending on the layout

David Gretzmier
07-01-2008, 06:03 PM
many times I think it is 60 ft til I measure it and it is 80 ft, further, I always build in at least room for 1 more light on each run. so I'm for 3 runs of 12 guage.

klkanders
07-01-2008, 07:15 PM
Hey Joey and Billy,
I believe he said 2 seperate runs:

one run of 4 12v wash lights 35w approx 60 ft = 140 watts
one run of 2 12v wash lights 35w and one 12v spot 35w approx 40 ft = 105 watts

You are certainly fine with this but do not have much room on transformer if more lights are needed in future. I would either hub these or T method. Where the fixtures are located will determine this.

Good Luck!
Keith

Chris J
07-01-2008, 07:24 PM
I think you guys are misunderstanding his question. He has multiple runs already, but his total watt load is 245.
BIGHEAVY, from what I'm reading you have 140w on one run, and 105 on the other. As long as you aren't daisy chaining the fixtures, you are good to go. Depending on your transformer, you shouldn't load it beyond 80%, which would be 240, so you are still ok there.

Hooked on Phonics worked for me! :cool2: :laugh:

klkanders
07-01-2008, 07:44 PM
Chris,
Exactly what I said! I guess we are not too old to read a post correctly huh?
Joey and Billy are buyin us the first and second rounds next conference! :drinkup:

klkanders
07-01-2008, 08:01 PM
Still I would think with a name like BIGHEAVY you would use 8/2 on everything!
Sorry...too much sun today.............and caffeine!

Keith

BIGHEAVY
07-01-2008, 11:10 PM
I will have two separte runs & i was going to daisy chain them together 4 on one and three on other. if i could figure out how to post a pic of my house i could show what id like to do. thanks to all:usflag:

BIGHEAVY
07-01-2008, 11:28 PM
http://img.villagephotos.com/p/2008-7/1315186/lights.jpg

BIGHEAVY
07-01-2008, 11:31 PM
well heres what i want to do, run 4 wash lights piggybacked along the left side of house approx 45-60 ft and 2 wash lights and one spot on the tree on right piggybacked. i know its probably not the correct way but this is what im going to try i bought the pinnacle lights and the ryco transformer.

thanks again
marc:):):)

TXNSLighting
07-02-2008, 01:13 AM
I will have two separte runs & i was going to daisy chain them together 4 on one and three on other. if i could figure out how to post a pic of my house i could show what id like to do. thanks to all:usflag:

o dear...stop.

Chris J
07-02-2008, 06:31 AM
It's no more work to make your home run go to the middle of the load, then splice in and T the wire so that each side has equal (or close) voltage. On the run with 3 lights, just make your T at the second fixture.

cgaengineer
07-02-2008, 06:47 AM
o dear...stop.

Yeah, Im no lighting expert (Not even close)...but dont daisy chain...it looks terrible!

Pro-Scapes
07-02-2008, 07:14 AM
what about the second story ?

Like others said do the T. Is this a multi tap trans ?

BIGHEAVY
07-02-2008, 11:05 PM
i know this is a terrible drawing but it is the best i can do so the square is the transformer with one run going to the left in the center i make a t connection and connect two lights to one side and two lights to the other side. then the other wire going to the right i will make same t but hook two lights to one side and one to the other is this correct?


http://img.villagephotos.com/p/2008-7/1315186/SKETCH.JPG

TXNSLighting
07-02-2008, 11:09 PM
link didnt work

BIGHEAVY
07-02-2008, 11:12 PM
i think its working now:)

klkanders
07-02-2008, 11:27 PM
Ummm what scale is that drawing? :) Just razzin ya!
The run with 3 fixtures:
Wire your center fixture right to the home run wire.......then take a chunk of 12/2 of each direction from it to the left and right fixture. Got it?

Your killin me smalls!
Good Luck!

Keith

TXNSLighting
07-02-2008, 11:28 PM
yeh thats right.

Tomwilllight
07-03-2008, 03:57 PM
Even the "T" method will give your problems if you ever want to add a fixture. Talk to the Unique guys about Hub type distribution. It is reliable and can be added to without much hassle. You'll use a little more wire for the project but in the long run the ability to set voltage exactly will pay off.