diff --git a/Systems/a320-electrical.xml b/Systems/a320-electrical.xml
index 5bc4dd30..b893f27f 100644
--- a/Systems/a320-electrical.xml
+++ b/Systems/a320-electrical.xml
@@ -2125,6 +2125,33 @@
 			<gain>1.0</gain>
 		</pure_gain>
 		
+		<!-- Mirror sub-buses (todo CB logic) -->
+		
+		<pure_gain name="/systems/electrical/bus/sub-bus/dc-hot-1-703"> <!-- Sub-bus with no CB protection -->
+			<input>/systems/electrical/sources/bat-1/volt</input>
+			<gain>1.0</gain>
+		</pure_gain>
+		
+		<pure_gain name="/systems/electrical/bus/sub-bus/dc-hot-2-704"> <!-- Sub-bus with no CB protection -->
+			<input>/systems/electrical/sources/bat-2/volt</input>
+			<gain>1.0</gain>
+		</pure_gain>
+		
+		<pure_gain name="/systems/electrical/bus/sub-bus/dc-2-202">
+			<input>/systems/electrical/bus/dc-2</input> <!-- todo CB 1PN2 -->
+			<gain>1.0</gain>
+		</pure_gain>
+		
+		<pure_gain name="/systems/electrical/bus/sub-bus/dc-2-204">
+			<input>/systems/electrical/bus/dc-2</input> <!-- todo CB 3PN2 -->
+			<gain>1.0</gain>
+		</pure_gain>
+		
+		<pure_gain name="/systems/electrical/bus/sub-bus/dc-2-206-208">
+			<input>/systems/electrical/bus/dc-2</input> <!-- todo CB 6PN -->
+			<gain>1.0</gain>
+		</pure_gain>
+		
 	</channel>
 	
 	<channel name="Emergency Electric Logic" execrate="8">
diff --git a/Systems/a320-fbw.xml b/Systems/a320-fbw.xml
index 27dc5285..1612ae69 100644
--- a/Systems/a320-fbw.xml
+++ b/Systems/a320-fbw.xml
@@ -267,7 +267,10 @@
 				/systems/failures/fctl/elac1 eq 0
 				<test logic="OR">
 					/systems/electrical/bus/dc-ess ge 25
-					/systems/electrical/bus/dc-hot-1 ge 25
+					<test logic="AND"> <!-- in flight: DC HOT backup -->
+						/systems/electrical/bus/sub-bus/dc-hot-1-703 ge 25
+						/gear/gear[1]/wow eq 0
+					</test>
 				</test>
 			</test>
 		</switch>
@@ -286,8 +289,11 @@
 				/controls/fctl/switches/elac2 eq 1
 				/systems/failures/fctl/elac2 eq 0
 				<test logic="OR">
-					/systems/electrical/bus/dc-2 ge 25
-					/systems/electrical/bus/dc-hot-2 ge 25
+					/systems/electrical/bus/sub-bus/dc-2-202 ge 25
+					<test logic="AND"> <!-- in flight: DC HOT backup -->
+						/systems/electrical/bus/sub-bus/dc-hot-2-704 ge 25
+						/gear/gear[1]/wow eq 0
+					</test>
 				</test>
 			</test>
 		</switch>
@@ -307,7 +313,10 @@
 				/systems/failures/fctl/sec1 eq 0
 				<test logic="OR">
 					/systems/electrical/bus/dc-ess ge 25
-					/systems/electrical/bus/dc-hot-1 ge 25
+					<test logic="AND"> <!-- in flight: DC HOT backup -->
+						/systems/electrical/bus/sub-bus/dc-hot-1-703 ge 25
+						/gear/gear[1]/wow eq 0
+					</test>
 				</test>
 			</test>
 		</switch>
@@ -325,7 +334,7 @@
 			<test logic="AND" value="1">
 				/controls/fctl/switches/sec2 eq 1
 				/systems/failures/fctl/sec2 eq 0
-				/systems/electrical/bus/dc-2 ge 25
+				/systems/electrical/bus/sub-bus/dc-2-204 ge 25
 			</test>
 		</switch>
 		
@@ -342,7 +351,7 @@
 			<test logic="AND" value="1">
 				/controls/fctl/switches/sec3 eq 1
 				/systems/failures/fctl/sec3 eq 0
-				/systems/electrical/bus/dc-2 ge 25
+				/systems/electrical/bus/sub-bus/dc-2-204 ge 25
 			</test>
 		</switch>