Question about Weatherproof WT-12 - Single Circuit Transformer - Landscape Lighting

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How to make multiple runs for low voltage transformer

300 W transformer #590 313. A Home Depot purchase. I want to make 2 separate short runs using 12 ga. cable. Can I connect the 2 wires from each of of the two cables to the LOW and Com cable ports? One run is ~50' with between 50-100 watts. the other run is ~40' with between 40-70 watts. Each run is in opposite directions. Using the loop method is not feasible.

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Yes, It will work fine splitting it into 2 runs connecting them together in the transformer. It will work better than running them all on one line. Sometimes running them all on one line the last light s dimmer than the first light. I was an electrician for 14 yrs. and I promise you it will work.

Posted on Dec 04, 2008

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1 Answer

Loud huming from my 300v low voltage lighting transformer


Transformers make humming sound.
ML300 series transformers make sound.
Used styrafoam to separate transformer from contact with building so sound is not carried.
These transformers have 10 year limited warranty.

Copy following link for general troubleshoot and tips, and warranty information, and trippers.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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Which timer do your have?
Not all timers work with fan motors?
Are you adding a new bath fan? Or are you installing a new timer?

What transformer what checked? A transformer is used to change voltage. For example you can plug a Malibu outdoor-light transformer into ordinary 120V outlet and the transformer changes voltage to 12 volts so you can safely operate lights stuck into the ground around bushes. Or your phone recharges using transformer that converts ordinary 120Volt into very low voltage entering your phone.
Practically every electronic device in your home has a transformer ... microwave, TV, computer ... but I don't know why a bath fan would have a transformer.
Add a comment, and I will respond.
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TDC low voltage transformer model DA 150 12 W reset button trips


There is a short circuit.
Copy following link to identify possible problem and download manual
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May 02, 2012 | Timers

1 Answer

Using Lowes mechanical timer in Hadco TC654-15 landscape lighting transformer. Have tried 3 timers now and timer clock does not work when plugged into the transformer. if I bypass the timer, low voltage...


Always a good idea to check outlet with cheap circuit analyzer.
And move timer to different outlet to see if difficulties are outlet-specific.
Try timer at neighbor's house.
Having 3 defects in a row is unusual.

There are no repairs for defective timers.

Timer clock motors stop working for many reasons, bad manufacturing of plastic gears and power surge and dirt and reversed polarity among the causes.
Using household plug-in timer is typical solution since clock modules are not sold separately.

Following link gives tips for having low-voltage power pack last longer, in case you decide to buy Intermatic-Malibu from Home Depot:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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I bought a Malibu 300W low voltage landscape transformer to replace a 200W unit that stopped working. It worked for 1 week, then stopped .. the reset **** doen't work. The LED works, I do see a...


I don't know if it burned out, but something is not right.
Malibu products come with 1-5 year warranty.
New product that stopped working should be exchanged for full replacement at place of purchase, except possibly the auction sites.
New Malibu product should work for many years.
Be sure to match bulb voltage with transformer voltage to avoid possible problems.
Mismatched bulb and transformer wattage should not affect a timer in short period such as 1 week.
Another thing to check is outlet polarity. Use circuit analyzer from home center to check outlet.
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1 Answer

My 600 watt 12 volt transformer timer for out door lighting does not keep time properly. HOw do I get and install a new timer?


1) Amazon sells 600Watt power pack:
http://www.amazon.com/Malibu-8100-9600-01-Voltage-Power-Transformer/sim/B002ZRPM4A/2

2) I bought new 300Watt Malibu power pack at Home Depot about 2 months ago.
Near the lighting section.
My new power pack has electronic time clock, so no more 'slow clock.'
I think Home Depot had 600Watt.
Lowes carries different brand.

3) Manuals for power packs at Malibu lights.com
http://www.malibulights.com/customer_service/owners_manuals.aspx

4) Tips for buying and taking care of power pack:
-Match up wattage of bulbs with wattage of power pack
-15 each X 20 watt bulbs = 300 watts, so install 300Watt power pack
-Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
-Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
-When working on bulbs, unplug power pack or it may burn out.
http://www.malibulights.com/guides_support/low_voltage_planning_guide/select_your_power_pack

5) How to install power pack.
Before unplugging old power pack, check which bulbs are not working.
Replace bulbs using phillips screwdriver.
Unplug power pack.
Notice how wires are connected to power pack, write down terminal connections.
Some power packs have three terminals ... extra terminal is for additional photoelectric eye.
Use pliers or screwdriver to disconnect wires.
New power pack has has same terminals.
Plug in power pack.
Read instruction manual before connecting wires.
Save instruction manual because a few years that manual won't be around as products change.

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3 Answers

Timer model PB912M10 does not run inside transformer ML300RTW. Can this be replaced. If so wher can it be purchased


I answer questions for free.
I specialize in timers and electrical devices.
I hesitate to answer about Malibu power packs because there are no parts or repairs for a power pack, and the owners of this product are angry that such an expensive item is unrepairable and then they downvote a truthful answer that is provided for free.

Here's what I've done for fixya customers.
For hours, I searched Intermatic Timers, Malibulights.com, and the web looking for parts and solutions for the Malibu power pack. There are no parts or solutions.

I purchased a power pack from Home Depot and examined it and then read the manual from head to toe.

The answer is this: if the power pack is not working for any reason and the receptacle has power, then the power pack is busted and you need another one.

However I can save you money on your next power pack, and that may be worth your trouble coming to fixya:
Your next power pack:
1) Match up wattage of bulbs with wattage of power pack.
15 each - 20 watt bulbs = 300 watts = 300 watt power pack ... if you buy the 500 watt power pack for 300Watts of bulbs, then it will burn up the bulbs and the power pack.
2) Replace bulbs as soon as they burn out or other bulbs will burn out and the power pack will burn out
3) When working on bulbs, unplug power pack or the power pack may burn out
4) Use the link below to help plan your low-voltage lighting
http://www.malibulights.com/guides_support/low_voltage_planning_guide/select_your_power_pack

Purchase a power pack:
Home depot sells Malibu power packs.
Lowes sells a Low-voltage power pack similar to Malibu

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2 Answers

Boosting output power


When you place the transformer in series you will be affecting the voltage on the output, placing them in parallel with give you the same voltage, but will increase the amperage output. Both transformers MUST be Identical. A switch must be used on the line side to disconnect Both simultaneously, for safety reasons.

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1 Answer

I just purchased some spotlights to add to my already installed malibu landscaping lights. I upgraded my transformer to 300 watts since the total wattage used comes out to 220. The lights on the end of...


Yes, using a larger wire will help, as will using more than one run. If you want too, you can leave the 16 gauge wire in place, then run the new 12 gauge wire and transfer most of the lights to the new run.

The fewer lights on a run, the less dimming will occur, so put more lights on the 12 gauge run.

Also, the longer the run, the more dimming will occur.
You may want to reconsider the location of the transformer, if possible. In your case, it would be better to locate the transformer in the middle of the current run, and just split the run in half to make a run in each direction. Of course, that depends if you have a 120 volt outlet available in that area.

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