
ACM20 Series
Four-Function AC Power Meters
TYPICAL WIRING DIAGRAMS, CONT.
220 V
LOAD
Epoxy en c apsu l ation
Note: If the ACM20 displays zero Watts with
B
T B 1
power applied to the load, reverse the direction
of the wire passing through the CT's center hole.
See Technical Note 6 for more information.
Po l arity dot on bottom
L1
Fuse*
L2
A
220 Va c (50/60 Hz)
Figure 2. Wiring diagram for 220/240V systems with no neutral
1 20 V
LOAD
Epoxy en c apsu l ation
*See technical note 5.
Note: If the ACM20 displays zero Watts with
power applied to the load, reverse the direction
of the wire passing through the CT's center hole.
Fuse*
B
A
T B 1
See Technical Note 6 for more information.
Po l arity dot on bottom
L 1 Neutra l L2
220 Va c (50/60 Hz)
Figure 3. Wiring diagram for 120/240V systems with neutral (monitoring L1)
1 20 V
LOAD
Epoxy en c apsu l ation
*See technical note 5.
Note: If the ACM20 displays zero Watts with
B
T B 1
power applied to the load, reverse the direction
of the wire passing through the CT's center hole.
See Technical Note 6 for more information.
Po l arity dot on bottom
L 1 Neutra l L2
220 Va c (50/60 Hz)
Fuse*
A
*See technical note 5.
Figure 4. Wiring diagram for 120/240V systems with neutral (monitoring L2)
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MPM_ACM20 Series.B03 Page 4 of 6