vault backup: 2025-10-27 16:34:32

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2025-10-27 16:34:32 -04:00
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id: feeders
aliases: []
tags:
- destiny/permanent
- status/draft
- occupational/takeoff/feeders
- type/guide
- authorship/original
title: Feeders
- destiny/permanent
- occupational/takeoff/feeders
- status/draft
- type/guide
title: Feeders Takeoff
---
# Feeders
# Feeders Takeoff
[[conduit-routing]]
> [!important]
> Complete [[pre-takeoff-research]],
> including [[wiring-method-selection]],
> before beginning takeoff.
## Info
#### Fire Rated Feeders
## Execution
PDI estimating practice is to run all "emergency" feeds
(life-safety or just standby)
in a 2-hour rated assembly.
This usually requires no change to takeoff for high-rises
since electrical riser rooms are themselves fire-rated.
* RHW-2 insulated conductors in conduit -- "Lifeline Cable"
* 2-hour rated metal clad cable -- "Vitalink"
### Formatting
All feeder takeoff descriptions should be prefixed with `<parent> TO <child>`
@@ -33,22 +27,7 @@ All feeder takeoff descriptions should be prefixed with `<parent> TO <child>`
> (i.e. meter centers fed from bus plugs)
> so long as the typical is in the Feeders `Area`.
## Sequence
### 1. Preparation
Read about the project specifications and construction type:
* Deck thickness
* Wiring methods
* Conductor material
* Wire terminations (set-screw acceptable or compression required?)
Locate:
* Riser Diagram
* Feeder Schedule (if present)
* Main Electrical rooms and panel locations
### 2. Takeoff
### Routing
Run parallel to building lines
and route through corridors where possible.
@@ -67,42 +46,38 @@ or 10ft, whichever is greater.
Add an additional 5ft (total 15ft) for site runs
(primaries, secondaries, etc.).
#### Primaries
## Primaries
Usually only empty conduit if included.
#### Secondaries
## Secondaries
##### Wiring on Vault Racks
### Wiring on Vault Racks
Where secondary conductors run on racks in utility vaults
manually set the length of conduit,
measure the wire length,
add 20ft in addition to previously mentioned adders.
#### Feeders
## Feeders
`Area` = "01 - Feeders/Risers Building"
for all feeders, no matter the location.
#### Bus Duct
## Bus Duct
`COMMON ASSEMBLIES`/`DISTRIBUTION`/`BUS DUCT`
#### Conductor Support
## Conductor Support
![[nfpa-70_300_general-requirements#300.19(A) Spacing Intervals -- Maximum.]]
![[nfpa-70]]
`ITEM DATABASE`/`CONDUIT & FITTINGS`/`CABLE SUPPORT / WEDGES`/`... COMPLETE FITTING`/...
#### Grounding
## Grounding
See [[grounding-takeoff]].
#### Sleeving
## Sleeving
See [[sleeving-takeoff]].
### 3. Review