95 lines
2.0 KiB
Markdown
95 lines
2.0 KiB
Markdown
---
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id: feeders
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tags:
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- occupational/takeoff
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- status/draft
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- type/guide
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title: Feeders Takeoff
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---
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# Feeders Takeoff
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> [!important]
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> Complete [[pre-takeoff-research]],
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> including [[wiring-method-selection]],
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> before beginning takeoff.
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## Execution
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### Formatting
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All feeder takeoff descriptions should be prefixed with `<parent> TO <child>`
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> [!cite] [[joel-jansen]], in reference to Omni Hotels Raleigh (pp.)
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> It is acceptable to use typicals for identical feeders
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> (i.e. meter centers fed from bus plugs)
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> so long as the typical is in `Area` = "01 - Feeders/Risers ...".
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### Routing
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Run parallel to building lines
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and route through corridors where possible.
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> [!important]
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> All takeoffs in Systems with names including "site"
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> should be in "Site" Area, Phase, and Bid Item breakdowns.
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For adjacent panels, use a minimum 10ft length.
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#### Adders
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Use the difference in elevation between equipment
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or 10ft, whichever is greater.
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Add an additional 5ft (total 15ft) for site runs
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(primaries, secondaries, etc.).
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## Primaries
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* `Area` = "2 - Site"
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* `Phase` = "Site"
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* `System` = "PRI - Primaries"
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Usually only empty conduit if included.
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## Secondaries
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* `Area` = "2 - Site"
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* `Phase` = "Site"
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* `System` = "SEC - Secondaries"
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### Wiring on Vault Racks
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Where secondary conductors run on racks in utility vaults
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manually set the length of conduit,
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measure the wire length,
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add 20ft in addition to previously mentioned adders.
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## Feeders
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* `Area` = "01 - Feeders/Risers Building"
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* `Phase` = "Feeders"
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* `System` = "FRR - Feeders and Risers"
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> [!info] Garage Feeders
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> `Area` "01 - Feeders/Risers Garage" is seldom used.
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> It may be appropriate for totally separate parking garage buildings.
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> Seek clarification before using.
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## Bus Duct
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`COMMON ASSEMBLIES`/`DISTRIBUTION`/`BUS DUCT`/...
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## Conductor Support
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![[nfpa-70_300_general-requirements#300.19(A) Spacing Intervals --- Maximum.]]
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`ITEM DATABASE`/`CONDUIT & FITTINGS`/`CABLE SUPPORT / WEDGES`/`... COMPLETE FITTING`/...
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## Grounding
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See [[grounding-takeoff]].
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## Sleeving
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See [[sleeving-takeoff]].
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