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I had this problem also.  I opened the Z100 to investigate and found that the "commons" were not common - that is the accessory "positive" was internally attached to the track "negative."   When I connected the switch, the accessory "positive" was connected to track "negative" and tripped the Z1000 breaker

 

A quick test: with the Z1000 plugged in without any output connected (track or accessories) use a short length of wire and connect the two commons together, if the breaker trips, one of the commons is internally connected to the other positive.  I opened up a second Z1000 (one I knew worked correctly) to compare the wiring.  A little rewiring fixed the problem for me.

Bob

Originally Posted by MP147:

 

I opened the Z100 to investigate and found that the "commons" were not common - that is the accessory "positive" was internally attached to the track "negative."   When I connected the switch, the accessory "positive" was connected to track "negative" and tripped the Z1000 breaker

Bob

Would this Z1000 wiring be a safety problem that would affect this MTH transformer's UL (Underwriters Lab) approval and possibly necessitate a recall?

Post

OGR Publishing, Inc., 1310 Eastside Centre Ct, Ste 6, Mountain Home, AR 72653
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