Intermatic 300 transformer keeps tripping gfi

[Scottman]

I have just hooked up my two hayward color logics to the intermatic 300 watt transformer and the second they flash on the gfi trips. Even when I disconnect the lights it still trips.

I read what is below on a different thread. Is it sake to just use a regular breaker?

Quote Originally Posted by ozark01 View Post
I was just reading 680.23 (8) and it looks like I don't need a GFCI breaker if the transformer is listed and the secondary is 15 volts or less. Is this the case?
Yes, that is what 680.23(A)(8) says.

 

[danpik]

The GFCI will only protect the primary side of the transformer and the wiring to it. It will do nothing for the secondary side (output) and associated wiring. Knowing this, I am going to suspect that there is a problem with the transformer or the wiring between the control point and the transformer. I don't have my code book here with me today, so I will have to check on the codes tomorrow, but I suspect that you will still need the GFCI for the primary side of the transformer. The <15 volt limit is for the protection on the secondary side if I recall correctly.