---
id:
aliases: []
tags:
  - occupational/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