diff --git a/technic/machines/register/cables.lua b/technic/machines/register/cables.lua
index 39b3f08..8da650b 100644
--- a/technic/machines/register/cables.lua
+++ b/technic/machines/register/cables.lua
@@ -35,6 +35,12 @@ function technic.register_cable(tier, size)
 				type = "fixed",
 				fixed = technic.gen_cable_nodebox(x1, y1, z1, x2, y2, z2, size)
 			},
+			on_construct = function()
+				technic.networks = {}
+			end,
+			on_destruct = function()
+				technic.networks = {}
+			end,
 			after_place_node = function(pos)
 				local node = minetest.get_node(pos)
 				technic.update_cables(pos, technic.get_cable_tier(node.name))
diff --git a/technic/machines/switching_station.lua b/technic/machines/switching_station.lua
index 25310eb..449b4c9 100644
--- a/technic/machines/switching_station.lua
+++ b/technic/machines/switching_station.lua
@@ -136,7 +136,7 @@ local touch_nodes = function(list, tier)
 end
 
 local get_network = function(pos1, tier)
-	local cached = technic.networks[pos1]
+	local cached = technic.networks[minetest.hash_node_position(pos1)]
 	if cached and cached.tier == tier then
 		touch_nodes(cached.PR_nodes, tier)
 		touch_nodes(cached.BA_nodes, tier)
@@ -153,7 +153,7 @@ local get_network = function(pos1, tier)
 				i, technic.machines[tier], tier)
 		i = i + 1
 	until all_nodes[i] == nil
-	technic.networks[pos1] = {tier = tier, PR_nodes = PR_nodes, RE_nodes = RE_nodes, BA_nodes = BA_nodes}
+	technic.networks[minetest.hash_node_position(pos1)] = {tier = tier, PR_nodes = PR_nodes, RE_nodes = RE_nodes, BA_nodes = BA_nodes}
 	return PR_nodes, BA_nodes, RE_nodes
 end