vault backup: 2025-07-24 16:44:33

subfeeds.md

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+---
+id:
+aliases: []
+tags: 
+  - systems/subfeeds
+---
+# Subfeeds
+
+## Sequence
+
+### 1. Estimate preparation
+
+1. Read about the project specifications and construction type
+  * Delivery Method: (Plans & Specs, Design Build, Design Assist, Preliminary Budget)
+  * Deck Thickness
+  * Corridor Ceiling type
+
+2. In the drawings, locate:
+  * Unit Panel Schedules
+  * Unit Load Calculations
+  * Riser Diagram
+  * Subfeed schedule (if present)
+
+### 2. Takeoff
+
+1. Determine wiring method
+
+    | Construction Type | Wiring Method | Subfeed Options |
+    | ----------------- | ------------- | --------------- |
+    | 1,2 | MC Cable | MC, PVC, EMT |
+    | 3,4,5 | NM Cable | SER, EMT |
+
+    %%
+    TODO: Create flow chart for wiring methods.
+    Some cases to mention:
+    * Deck thickness (minimum 3x conduit outer diameter)
+    * Renovations (may not be able to run in slab)
+    %%
+
+2. Route subfeeds to the Meter Centers using appropriate adder lengths
+
+    > [!tip]
+    > Identify if and where typicals can be used
+
+3. Assign material to lengths and apply Voltage drop if applicable
+
+4. Pigtails and Wireway Troughs if applicable
+
+### 3. Extension (Review and Checking)
+
+1. Use the extension tab to determine the Correct Quantity