When I simply connect my new Zen32 switch to Line and Neutral, the breaker trips. Whether load is connected or not. I don’t think that should be happening?
It is a very simple device and I’ve never had one with a dead short out of the box.
Do you have a multimeter? What are your voltage measurements (with the zen32 disconnected) line to neutral, line to ground, and ground to neutral?
Also are you sure the screws on the zen32 aren’t hitting the box or another grounding source?
Also if you have pictures they are sometimes helpful. (Of the box inside and wires )
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120v line to neutral, and line to ground
nothing ground to neutral
Device was hanging out of the box, nothing was touching it.
The LED’s on the front would all light up briefly before the breaker then tripped.
No pics, sorry - I’ve put the old switch back in.
Is this breaker a gfci and/or afci by chance?
Are there other switches in the same box as this one switch?
I’m wondering if you are using the neutral that is associated with a different breaker somehow accidentally.
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actually you know what - that’s a possibility! There’s a switch in the box that feeds a house>garage breezeway light, and I the breaker for that is in a subpanel in the garage.
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#($!@
There is another bundle of neutrals buried in the back of the box. Using that one works.
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You found it! @getoffmylawn suggested just what I was thinking.
A GFCI or AFCI in the breaker box requires the neutral for that branch circuit to be only connected to whatever load is connected to the line side of that circuit. When you introduced what the breaker thought was a ground fault, you actually proved the GFCI/AFCI was working as it should! 
And welcome to the Zooz Community, @Lantech!
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welp, once I got through all that, I found that the way it’s wired for 4-way isn’t going to work.
The line is in one box, and the feed to the light is in another box.
I’ll use the switch elsewhere though.
That’s awesome! Glad you found it.
As @Barkis said - at least you tested your GFCI/AFCI 
And, yes… Welcome to the community!
Bummer. If it was a 3-way, it would work; but 4-way, you are correct… needs line/load in same box 
Edit to add: If you are up to replacing the other switches in the 4-way, you could:
- replace the other switches with smart switches: How To Use Multiple Zooz Switches In 3-Way and 4-Way Set-Ups - Zooz Support Center
- see @barkis post below, but I think that would require momentary switches in each location (?)
Don’t give up ‘till you read the support article, “4-Way Diagram for ZEN71, ZEN72, ZEN32, and ZEN35 Switches” on the Zooz support portal. If I understand what you’re saying, there’s a way to do this. Isn’t Option 2 what you have?
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Believe you’re correct. At least the ZAC99 is inexpensive, LOL
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This is definitely Option 2 (load and line in separate boxes). While you won’t be able to use the ZEN32 with the 2 existing mechanical switches in a 4-way set-up, you have the alternative solutions mentioned above by @getoffmylawn and @Barkis (thanks for sharing the tips and resources!).
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I thank everyone for the help, I’m just going to put in a different smart switch for this particular set of lights. I’ve got another use for the scene switch, in fact I’ve already installed it elsewhere.
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