98 lines
2.1 KiB
Markdown
98 lines
2.1 KiB
Markdown
---
|
|
id: feeders
|
|
aliases: []
|
|
tags:
|
|
- authorship/original
|
|
- destiny/permanent
|
|
- occupational/takeoff
|
|
- status/draft
|
|
- type/guide
|
|
title: Feeders Takeoff
|
|
---
|
|
# Feeders Takeoff
|
|
|
|
> [!important]
|
|
> Complete [[pre-takeoff-research]],
|
|
> including [[wiring-method-selection]],
|
|
> before beginning takeoff.
|
|
|
|
## Execution
|
|
|
|
### Formatting
|
|
|
|
All feeder takeoff descriptions should be prefixed with `<parent> TO <child>`
|
|
|
|
> [!cite] Joel Jansen, in reference to Omni Hotels Raleigh (pp.)
|
|
> It is acceptable to use typicals for identical feeders
|
|
> (i.e. meter centers fed from bus plugs)
|
|
> so long as the typical is in `Area` = "01 - Feeders/Risers ...".
|
|
|
|
### Routing
|
|
|
|
Run parallel to building lines
|
|
and route through corridors where possible.
|
|
|
|
> [!important]
|
|
> All takeoffs in Systems with names including "site"
|
|
> should be in "Site" Area, Phase, and Bid Item breakdowns.
|
|
|
|
For adjacent panels, use a minimum 10ft length.
|
|
|
|
#### Adders
|
|
|
|
Use the difference in elevation between equipment
|
|
or 10ft, whichever is greater.
|
|
|
|
Add an additional 5ft (total 15ft) for site runs
|
|
(primaries, secondaries, etc.).
|
|
|
|
## Primaries
|
|
|
|
* `Area` = "2 - Site"
|
|
* `Phase` = "Site"
|
|
* `System` = "PRI - Primaries"
|
|
|
|
Usually only empty conduit if included.
|
|
|
|
## Secondaries
|
|
|
|
* `Area` = "2 - Site"
|
|
* `Phase` = "Site"
|
|
* `System` = "SEC - Secondaries"
|
|
|
|
### 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
|
|
|
|
* `Area` = "01 - Feeders/Risers Building"
|
|
* `Phase` = "Feeders"
|
|
* `System` = "FRR - Feeders and Risers"
|
|
|
|
> [!info] Garage Feeders
|
|
> `Area` "01 - Feeders/Risers Garage" is seldom used.
|
|
> It may be appropriate for totally separate parking garage buildings.
|
|
> Seek clarification before using.
|
|
|
|
## Bus Duct
|
|
|
|
`COMMON ASSEMBLIES`/`DISTRIBUTION`/`BUS DUCT`
|
|
|
|
## Conductor Support
|
|
|
|
![[nfpa-70_300_general-requirements#300.19(A) Spacing Intervals --- Maximum.]]
|
|
|
|
`ITEM DATABASE`/`CONDUIT & FITTINGS`/`CABLE SUPPORT / WEDGES`/`... COMPLETE FITTING`/...
|
|
|
|
## Grounding
|
|
|
|
See [[grounding-takeoff]].
|
|
|
|
## Sleeving
|
|
|
|
See [[sleeving-takeoff]].
|