By Intermatic



Part # PX300

Dimensions 7-1/8" X 5-1/8"

Alternate Part #'s INTPX300

Product Description

12V 300 watt Galvanized Steel Transformer
Safety transformer supplies 12 volts to pool and spa lights, submersible fixtures and outdoor garden lights.

Designed for safe operation with a grounded shield between the primary and secondary windings.  Also includes built-in circuit protection that disconnects power to the transformer in case of defect or overload.

Can be used with multiple 12v lights, not to exceed total wattage of 300.

Product Specs

  • 300 Watt
  • Steel enclosure (beige)
  • Weather proof
  • 120 V, 3 Amp
  • 12,13 or 14 V
  • Dimensions: 7.25" (Height) X 5.25" (Width) X 4.5" (Depth)


Product Specifications

12 V
300 W

?     Asked on 6/5/2006by Guest

Is is this transformer weather proof?

A  Answered on 6/5/2006 by InyoPools Product Specialist Patrick P.

Yes the Intermatic transformer is weather proof.

?     Asked on 12/16/2006by Guest

I am going to purchase two 12 Volt lights do I need to purchase a transformer with these lights?

A  Answered on 12/16/2006 by InyoPools Product Specialist Patrick P.

The power coming from your house is 120V so you will need to purchase a transformer to drop the voltage from 120V coming from your house down to 12V going to the pool light. We sell two transformers the PX100 which can handle up to 100 watts and the PX300 which can handle up to 300 Watts. You may also put multiple lights on one transformer, for example if you had two 50 watt lights then you would only need to purchase one PX100 transformer and wire both lights into this single transformer.

?     Asked on 1/24/2013by Guest

Can you hook up more than one light to this transformer?

A  Answered on 1/24/2013 by InyoPools Product Specialist Patrick P.

The PX300 is a 300 watt transformer. You can connect multiple lights to the transformer as long as the total combined wattage does not exceed 300 watts.

?     Asked on 10/16/2013by Guest

How much does this weight?

A  Answered on 10/16/2013 by InyoPools Product Specialist Patrick P.

This transformer is twelve(12) pounds(lbs).

?     Asked on 4/6/2015by Fred Conrath

If a use a 300 watt transformer but only have 75 watts of LED lights does the transformer consume the 300 watts or the 75 watts being used by the LED lights?

A  Answered on 4/6/2015 by InyoPools Product Specialist Brian M.

It would only consume the wattage needed. No more.


Est. Repair Time

1 to 2 hrs

Tools Needed

Screwdriver, Wire stripper

1     0

I wanted to convert a 110 volt pool light to a 12 volt pool light.

Written on 6/15/2020 by Guest

I located the wires running from the electrical box to the junction box for the pool light. I found a point where I could split the wires to connect it to the Intermatic 300 watt transformer. I turned off the breaker for the power supply to the pool light. I dug until I found the PVC conduit for the light and cut it in half (after verifying the power was off).

I then routed the wires coming from the home to the location where I placed the transformer and then routed the wires going to the junction box for the pool light as well. The wiring instructions on the back of the transformer's lid was easy to read. I then had to replace my pool light to a 12 volt light and run the wires to the junction box. I made the connections and proceeded to turn on the power.

Everything worked! Very easy to install.

Were these instructions helpful? 


Est. Repair Time

Less than 1 hr

Tools Needed

Licensed Electrician

0     4

Converting 2 pool lights to low voltage and LED

Written on 9/26/2017 by Guest

The transformer install was the one step that I hired an electrician to perform since it required conduit and we added an additional breaker to the Jbox. The installation was about the same cost as 1 new Pureline color-changing LED bulb.

Were these instructions helpful? 


Review Summary

 (Average 4.82  out of 5 stars)
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