diff --git a/Content.Shared/RCD/Components/RCDComponent.cs b/Content.Shared/RCD/Components/RCDComponent.cs
index 05e31dbd20..5d2ab9a391 100644
--- a/Content.Shared/RCD/Components/RCDComponent.cs
+++ b/Content.Shared/RCD/Components/RCDComponent.cs
@@ -1,5 +1,6 @@
 using Content.Shared._White.RCD;
 using Content.Shared.RCD.Systems;
+using Content.Shared.Whitelist;
 using Robust.Shared.Audio;
 using Robust.Shared.GameStates;
 using Robust.Shared.Physics;
@@ -76,4 +77,11 @@ public sealed partial class RCDComponent : Component
     /// </remarks>
     [ViewVariables(VVAccess.ReadOnly)]
     public Transform ConstructionTransform { get; private set; } = default!;
+
+    /// <summary>
+    /// WD.
+    /// A blacklist for limiting entities of the same construction group on one tile.
+    /// </summary>
+    [DataField]
+    public EntityWhitelist? BlacklistOnOneTile;
 }
diff --git a/Content.Shared/RCD/Systems/RCDSystem.cs b/Content.Shared/RCD/Systems/RCDSystem.cs
index 6dea49a385..f3ec9d6836 100644
--- a/Content.Shared/RCD/Systems/RCDSystem.cs
+++ b/Content.Shared/RCD/Systems/RCDSystem.cs
@@ -13,6 +13,7 @@ using Content.Shared.Popups;
 using Content.Shared.RCD.Components;
 using Content.Shared.Tag;
 using Content.Shared.Tiles;
+using Content.Shared.Whitelist;
 using Robust.Shared.Audio.Systems;
 using Robust.Shared.Map;
 using Robust.Shared.Map.Components;
@@ -47,6 +48,7 @@ public class RCDSystem : EntitySystem
     [Dependency] private readonly IPrototypeManager _protoManager = default!;
     [Dependency] private readonly SharedMapSystem _mapSystem = default!;
     [Dependency] private readonly TagSystem _tags = default!;
+    [Dependency] private readonly EntityWhitelistSystem _blacklist = default!;
 
     private readonly int _instantConstructionDelay = 0;
     private readonly EntProtoId _instantConstructionFx = "EffectRCDConstruct0";
@@ -405,21 +407,40 @@ public class RCDSystem : EntitySystem
             // Check for existing identical entities in the same tile
             _intersectingEntities.Clear();
             _lookup.GetLocalEntitiesIntersecting(mapGridData.GridUid, mapGridData.Position, _intersectingEntities, -0.05f, LookupFlags.Uncontained);
-
+            // WD EDIT START
             if (component.CachedPrototype.Prototype != null)
             {
                 foreach (var entity in _intersectingEntities)
                 {
-                    // Check if the entity has the same prototype ID
-                    if (MetaData(entity).EntityPrototype?.ID == component.CachedPrototype.Prototype)
+                    var entityID = MetaData(entity).EntityPrototype?.ID;
+                    if (entityID == null)
+                        continue;
+
+                    // Prevents building entities from same construction group on one tile
+                    if (component.BlacklistOnOneTile?.Tags != null)
+                    {
+                        foreach (var tag in component.BlacklistOnOneTile.Tags)
+                        {
+                            if (_blacklist.IsValid(component.BlacklistOnOneTile, entity) && component.CachedPrototype.Category == tag)
+                            {
+                                if (popMsgs)
+                                    _popup.PopupClient(Loc.GetString("rcd-component-cannot-build-blacklisted-entity"), uid, user);
+                                return false;
+                            }
+                        }
+                    }
+
+                    // Prevents building identical electrical entities on same tile
+                    if (component.CachedPrototype.Category == "Electrical" && entityID == component.CachedPrototype.Prototype)
                     {
                         if (popMsgs)
-                            _popup.PopupClient("An identical object already exists in this location.", uid, user);
+                            _popup.PopupClient(Loc.GetString("rcd-component-cannot-build-identical-entity"), uid, user);
 
                         return false;
                     }
                 }
             }
+            // WD EDIT END
 
             var isWindow = component.CachedPrototype.ConstructionRules.Contains(RcdConstructionRule.IsWindow);
             var isCatwalk = component.CachedPrototype.ConstructionRules.Contains(RcdConstructionRule.IsCatwalk);
diff --git a/Resources/Locale/ru-RU/rcd/components/rcd-component.ftl b/Resources/Locale/ru-RU/rcd/components/rcd-component.ftl
index aef1b2b11b..fc08ea2b82 100644
--- a/Resources/Locale/ru-RU/rcd/components/rcd-component.ftl
+++ b/Resources/Locale/ru-RU/rcd/components/rcd-component.ftl
@@ -30,7 +30,8 @@ rcd-component-must-build-on-subfloor-message = Вы можете строить
 rcd-component-cannot-build-on-subfloor-message = Вы не можете строить это на открытом полу!
 rcd-component-cannot-build-on-occupied-tile-message = Вы не можете строить здесь, это место уже занято!
 rcd-component-cannot-build-identical-tile = Эта плитка уже существует!
-
+rcd-component-cannot-build-blacklisted-entity = Вы не можете строить здесь, недостаточно свободного места!
+rcd-component-cannot-build-identical-entity = Идентичный объект уже существует в этом месте!
 
 ### Category names
 
diff --git a/Resources/Prototypes/Entities/Objects/Tools/tools.yml b/Resources/Prototypes/Entities/Objects/Tools/tools.yml
index 9cbda39cd5..3a6f430fe3 100644
--- a/Resources/Prototypes/Entities/Objects/Tools/tools.yml
+++ b/Resources/Prototypes/Entities/Objects/Tools/tools.yml
@@ -466,6 +466,9 @@
     - APC # WD
     - Camera # WD
     - Deconstruct
+    blacklistOnOneTile: # WD
+      tags:
+      - Lighting
 
 - type: entity
   id: RCDEmpty
@@ -528,6 +531,9 @@
     - DisposalUnit # disposal units
     - MailingUnit
     - ToiletEmpty
+    blacklistOnOneTile: # WD
+      tags:
+      - DisposalUnits
 
 - type: entity # WD
   id: RapidPipeDispenserEmpty
diff --git a/Resources/Prototypes/Entities/Structures/Lighting/base_lighting.yml b/Resources/Prototypes/Entities/Structures/Lighting/base_lighting.yml
index 0561fe2683..840a00acb8 100644
--- a/Resources/Prototypes/Entities/Structures/Lighting/base_lighting.yml
+++ b/Resources/Prototypes/Entities/Structures/Lighting/base_lighting.yml
@@ -81,6 +81,9 @@
       - !type:PlaySoundBehavior
         sound:
           collection: GlassBreak
+  - type: Tag # WD EDIT
+    tags:
+    - Lighting
   - type: LightingOverlay # WD
   - type: LightMark
   placement:
diff --git a/Resources/Prototypes/Entities/Structures/Piping/Disposal/units.yml b/Resources/Prototypes/Entities/Structures/Piping/Disposal/units.yml
index 2198c854a0..0ea7eae9be 100644
--- a/Resources/Prototypes/Entities/Structures/Piping/Disposal/units.yml
+++ b/Resources/Prototypes/Entities/Structures/Piping/Disposal/units.yml
@@ -64,6 +64,9 @@
   - type: StaticPrice
     price: 62
   - type: PowerSwitch
+  - type: Tag # WD EDIT
+    tags:
+    - DisposalUnits
 
 - type: entity
   id: DisposalUnit
diff --git a/Resources/Prototypes/_White/tags.yml b/Resources/Prototypes/_White/tags.yml
index 7dc0743d05..51b3f66a7d 100644
--- a/Resources/Prototypes/_White/tags.yml
+++ b/Resources/Prototypes/_White/tags.yml
@@ -103,5 +103,11 @@
 - type: Tag
   id: ClusterBang
 
+- type: Tag
+  id: Lighting
+
+- type: Tag
+  id: DisposalUnits
+
 - type: Tag
   id: VoiceActivatedBombImplant