e57
Senior Member
- Location
- San Francisco, CA
So I have an install coming up with 2-circuit Monorail track - it's 3-wire...
And I roughed in the transformers - and think to myself - 'This could go horribly wrong' - better call the manufacturer..... As the way I think it should be connected might not be right in the end - and too expensive to experiment.
When faced with two LV lighting transformers how would you approach it? Two switch legs from the same 120v branch CB to 2 transformers for 24/12v ungrounded/floating neutral.... I thought about it and came up with one way.
Since I am using third party transformers I checked the lightnings originally spec'ed transformer instructions - they reversed the secondary, and made no mention about phasing and polarity of the primaries - you could easily have fed this from a 3-wire circuit.... Wow - that could be bad.... Then I checked the manufacturer for the transformers I am using - See attatched - simular. Anyway for both diagrams, the OCP would be on the hot side of one leg, and the neutral side of the other - I thought this odd - what say you???
And I roughed in the transformers - and think to myself - 'This could go horribly wrong' - better call the manufacturer..... As the way I think it should be connected might not be right in the end - and too expensive to experiment.
When faced with two LV lighting transformers how would you approach it? Two switch legs from the same 120v branch CB to 2 transformers for 24/12v ungrounded/floating neutral.... I thought about it and came up with one way.
- Reverse one of the primaries (Code violation as the conductor is white...)
- Connect common taps on secondary of both
- Move OCP to non-common taps
Since I am using third party transformers I checked the lightnings originally spec'ed transformer instructions - they reversed the secondary, and made no mention about phasing and polarity of the primaries - you could easily have fed this from a 3-wire circuit.... Wow - that could be bad.... Then I checked the manufacturer for the transformers I am using - See attatched - simular. Anyway for both diagrams, the OCP would be on the hot side of one leg, and the neutral side of the other - I thought this odd - what say you???
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