SMB350 User’s Manual
Page 27
5 Frequently Asked Questions
Q. How can different types of CTs be used on a single SMB350?
A. Different types of CTs may be used on a single SMB350 under certain conditions
and with certain limitations, please see the section on “Product Information” for a
detailed explanation.
Q. Can a single SMB350 be used to monitor two different sub panels?
A. (1)
It is possible If the two sub panels have the same power source.
(2) If the two sub panels do not share the same power source, then two separate
SMB350s must be used.
Q. Can a single CT be used to monitor multiple circuits?
A. It is possible to do so if the different circuits share the same phase and power
source. The L wire for each circuit must go through the CT in the same direction,
and the current rating of the CT in must be higher than the total amperage for all
the circuits to be measured.
Q. Can the wires for both the measured voltage and CT secondary be placed
within the same conduit?
A. Yes they can be placed together in the same conduit.
Q. Can the wires for both the measured voltage and the communication be
placed within the same conduit?
A. No, it is not recommended as the communication is sensitive to noise and
interference. They should each be placed in their own conduits separately.
