Make sure that power flow won't exceed network capabilities

api.lua

@@ -239,7 +239,7 @@ industrialtest.api.powerFlow=function(pos)
 		local endpointMeta=minetest.get_meta(endpoint.position)
 		-- TODO: if supplying machine power flow is too large for receiving machine to handle then that machine should explode
 		local transferredToEndpoint=false
-		if industrialtest.api.transferPower(meta,endpointMeta,powerDistribution)>0 then
+		if industrialtest.api.transferPower(meta,endpointMeta,math.min(powerDistribution,endpoint.flow))>0 then
 			transferred=true
 			transferredToEndpoint=true
 		end
@@ -277,6 +277,18 @@ local function addNodeToNetwork(pos,networkMasterPos)
 	meta:set_string("industrialtest.networks",minetest.serialize(networks))
 end
 
+local function clampFlow(pos,flow)
+	local def=minetest.registered_nodes[minetest.get_node(pos).name]
+	local newFlow
+	if def.groups and def.groups._industrialtest_cable then
+		newFlow=def._industrialtest_cableFlow
+	else
+		local meta=minetest.get_meta(pos)
+		newFlow=meta:get_int("industrialtest.powerFlow")
+	end
+	return math.min(flow,newFlow)
+end
+
 -- \brief Creates network map starting from node at pos
 -- \param pos vector
 -- \returns table with network map
@@ -297,11 +309,14 @@ industrialtest.api.createNetworkMap=function(pos)
 			table.insert(workers,{
 				position=conn,
 				distance=1,
+				flow=def._industrialtest_cableFlow
 			})
 		else
+			local meta=minetest.get_meta(conn)
 			table.insert(map,{
 				position=conn,
-				distance=0
+				distance=0,
+				flow=meta:get_int("industrialtest.powerFlow")
 			})
 		end
 	end
@@ -326,17 +341,20 @@ industrialtest.api.createNetworkMap=function(pos)
 							if directionAssigned then
 								table.insert(workers,{
 									position=conn,
-									distance=worker.distance+1
+									distance=worker.distance+1,
+									flow=clampFlow(conn,worker.flow)
 								})
 							else
 								worker.position=conn
 								worker.distance=worker.distance+1
+								worker.flow=clampFlow(conn,worker.flow)
 								directionAssigned=true
 							end
 						else
 							table.insert(map,{
 								position=conn,
-								distance=worker.distance
+								distance=worker.distance,
+								flow=clampFlow(conn,worker.flow)
 							})
 							if #connections==1 then
 								table.remove(workers,i)

cables.lua

@@ -103,7 +103,8 @@ local function registerCable(name,displayName,size,flow,registerInsulated)
 			"group:_industrialtest_hasPowerOutput",
 			"group:_industrialtest_cable"
 		},
-		on_construct=cable.onConstruct
+		on_construct=cable.onConstruct,
+		_industrialtest_cableFlow=flow
 	}
 	if industrialtest.mtgAvailable then
 		definition.groups={