Which of the following is controlled by low-voltage circuits (alternating current below 50V)?
A. intercoms, B. remote lighting fixtures, C. doorbells, D. heating + cooling systems, E. all of the above
E. all of the above is correct.
Normal line voltage is transformed by a step-down transformer to supply low-voltage circuits.
are-review.blogspot.com
A. intercoms, B. remote lighting fixtures, C. doorbells, D. heating + cooling systems, E. all of the above
E. all of the above is correct.
Normal line voltage is transformed by a step-down transformer to supply low-voltage circuits.
are-review.blogspot.com
Comments
Post a Comment