Energy, Inc. • 3297 Pacific Street • Charleston, South Carolina 29407 • (843) 766-9800
Page 27
will be Phase B, Circuit 5 will be Phase A, etc.
b) Circuit breakers are generally 1” wide. In some cases 1⁄2” wide circuit breakers are
used. The phases alternate in 1” segments, so two 1⁄2” circuit breakers will share
the same phase. In this case circuits 1,3 will be on Phase A and 5,7 will be on Phase
B, etc.
c) The easiest solution is to simply determine which circuit breaker turns off the RDU
and connect the MTU to the same circuit breaker.
d) Refer to Fig A-3 (Page 30).
6) Connecting the MTU wires
a) When installing the MTU power wires to the circuit breaker or neutral bus, it is im-
portant that the connections be snug. If these are not snug connections, there is a
possibility of arcing faults and re.
b) Insure that the wires t between the pressure plates on the circuit breaker or through
the screw hole on the neutral bus.
c) Tighten snugly, but do not over tighten.
d) Pull on the wires to insure they are properly secured.
7) Installing the current transformers.
a) The current transformers must be clipped over the two phase conductors, Phase A
and Phase B. Never over the neutral conductor.
b) The current transformers must be installed with the red polarity dots facing the same
direction. Either both facing the main circuit breaker or both facing away from the
main circuit breaker. If they are installed incorrectly the power in Phase B will be
subtracted from that in Phase A instead of being added and all measurements will
be incorrect.
c) The jaws of the CT’s must close snuggly; if not closed snugly, the readings will be
low.
8) Safety
a) To guard against electric shock, wear rubber soled shoes and do not work in wet
locations.
b) To guard against electric shock wear rubber gloves approved for the maximum volt-
age of the equipment.
c) To guard against electric ash, wear safety goggles and gloves.
9) Installing the MTU and CT’s
a) If you are condent that you know what you are doing and you are allowed to do so
by the authorities having jurisdiction. Please be careful and proceed with the instal-
lation detailed in Part III.
A P P E N D I X A
D E T A I L E D I N S T A L L A T I O N I N S T R U C T I O N S
(Continued)
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