Electrical issue (Arc fault)

So I bought a new house.

Set up tent, lights, fan etc.

When the timer turns to "on" for the lights, my breaker trips and shows an arc fault.

I've tried multiple rooms, same thing.

I've had an electrician here for something unrelated, he said the panel and electrical work looks great....i don't want to ask any red flag questions for reasons....


Any suggestions at what i should do? The lights aren't anything extravagant. Just small sunrise LED

Does the light work when it's plugged straight into the wall, without going through the timer? If it does, try a different timer

The timer contacts on many timers cause an arc. Newer homes by code have arc fault protection breakers on the bedrooms. They can be problematic, if simply switching the breaker to a non arc fault type doesn't fix the problem then you have issues that need further investigation.

Some of the early arc fault breakers would even have cross talk issues, an arc fault occurs on an adjacent circuit causing the unrelated circuit to trip indicating an arc fault. Honestly I hate arc fault breakers for grows.

Renfro said:

The timer contacts on many timers cause an arc. Newer homes by code have arc fault protection breakers on the bedrooms. They can be problematic, if simply switching the breaker to a non arc fault type doesn't fix the problem then you have issues that need further investigation.

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Thank you, exactly what i was hoping to do but wasn't sure.