Files
zmVault/feeders-takeoff.md
T

2.1 KiB

id, aliases, title, tags, up
id aliases title tags up
feeders
feeders takeoff
Feeders Takeoff
occupational/takeoff
status/draft
type/guide
takeoff-scripts

Feeders Takeoff

Important

Complete pre-takeoff-research, including conest-wiring-method-selection, before beginning takeoff.

Execution

  1. Primaries
  2. Secondaries
  3. Feeders
  4. Grounding

Formatting

All feeder takeoff descriptions should be prefixed with <parent> TO <child>

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 ...".1

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.