Intermatic PX300 not working

Can you test the secondary side of the transformer? Are you getting 12V AC? Is there a daylight sensor in series with the hot leg? If so, test the resistance of the sensor when it’s in daylight and when it’s blinded (a piece of black electrical tape will do). Any internal fuses?

You can also pull the leads from the box that feed your lights and test it for a short. Depending on the bulb types out in your landscape lighting, you should see some resistance across the two leads. A dead short of zero resistance might mean a broken or shorted line somewhere.
 
Matt,

I may just be confused, but the OP said he was using an Intermatic transformer.. :scratch:

The AC side has to wired like the drawing or it will not work.. The low voltage side is just two wires like you said..

Jim R.
 
I updated my post. When I looked at the diagram I switched the primary and secondary sides around in my head.
 
Matt,

That is what makes it so confusing for most folks... Most step down transformers have two wires for the AC input and you select from the multiple output wires for the voltage you want..

These Intermatic transformers are wired backwards in my mind... Well, like most everything else in my mind.. :mrgreen:

Thanks,

Jim R.
 
I’ve got it wired right, just followed diagram on inside of cover and wired to black lead for 12v. I even took it off aux 2 and wired directly to 120v hot in the pentagram box but no lights. I’ll check low voltage side with meter and report back...thanks for input!
 

Enjoying this content?

Support TFP with a donation.

Give Support
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.