Low-voltage connections to current transformer for make-up air unit
I’ll be using an Electro Industries packaged make-up system with two current transformers to energize the unit: one on the range hood circuit and the second on the electric dryer circuit. Both CTs will be located in or adjacent to the breaker panel, with the output side of each CT routed to the make-up air unit control board. How does one comply with NEC rules that low-voltage and line-voltage wiring (connections) can’t be within the same junction box (compartment)?
Is it permissible to place the CT inside its own J-box and route the CT low-voltage leads through a short nipple to a second J-box where the connection to the LV control wiring to the make-up air unit will be made? This seems to follow the design for LED lighting transformer junction boxes where the line-voltage and low-voltage connections are made within separate compartments.
Anyone used the Electro Industries units like the EM-MC05-240-1-08 and devised a solution to this quandry? How do folks who install current transformers to monitor branch circuits within breaker panels deal with this?
Would appreciate any info so I can have a reasonable solution in hand when I approach the electrician; who may of course already know the answer, but if not I’d like to have an option or two to present to him. Thanks!
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