3.3 KiB
id, aliases, tags
| id | aliases | tags | |
|---|---|---|---|
| feeders |
|
Feeders
Info
Sequence
1. Estimate preparation
Read about the project specifications and construction type:
- Delivery Method (Plans & Specs, Design Build, Design Assist, Preliminary Budget)
- Deck thickness
- Wiring method
- Conductor material (Aluminum/Copper)
Locate:
- Riser Diagram
- Feeder Schedule (if present)
- Main Electrical rooms and panel locations
- Routing (if present)
2. Takeoff
- Choose a starting point on the riser
- Determine wire & Conduit makeup (3Ph/1Ph, AL/CU, Conduit)
- Measure off the length of the feed ADDERS
- Square corners, use corridors if possible
Important
All takeoffs in Systems with names including "site" should be in "Site" Area, Phase, and Bid Item breakdowns.
Important
Use 15ft adders for site runs (primaries, secondaries, etc.), as opposed to standard 10ft adder, to account for variability.
Primaries
Secondaries
Feeders
Bus Duct
COMMON ASSEMBLIES/DISTRIBUTION/BUS DUCT
Cable Support
[!quote] 300.19 Supporting Conductors in Vertical Raceways. (A) Spacing Intervals -- Maximum. Conductors in vertical raceways shall be supported if the vertical rise exceeds the values in Table 300.19(A). At least one support method shall be provided for each conductor at the top of the vertical raceway or as close to the top as practical. Intermediate supports shall be provided as necessary to limit supported conductor lengths to not greater than those values specified in Table 300.19(A).
[!cite] Table 300.19(A) Spacings for Conductor Supports
Conductor Size Aluminum or Copper-Clad Aluminum Copper 18 AWG through 8 AWG 100ft 100ft 6 AWG through 1/0 AWG 200ft 100ft 2/0 AWG through 4/0 AWG 180ft 80ft Over 4/0 AWG through 350 kcmil 135ft 60ft Over 350 kcmil through 500 kcmil 120ft 50ft Over 500 kcmil through 750 kcmil 95ft 40ft Over 750 kcmil 85ft 35ft
ITEM DATABASE/CONDUIT & FITTINGS/CABLE SUPPORT / WEDGES/... COMPLETE FITTING/...
Sleeving
See sleeving.
Grounding
This script is intended to cover both electrical and telecom grounding in lieu of detail sufficient for standard takeoff (e.g. a grounding riser).
COMMON ASSEMBLIES/GROUNDING
System Grounding
Area: "01 - Feeders/Risers Building"
COMMON ASSEMBLIES/GROUNDING/GND = #3/0 & 1" CONDUIT - EMT
- Length: Measure around the main electrical rooms to stacked
- Count: Total number of electrical rooms
COMMON ASSEMBLIES/GROUNDING/(3) ... x 10' CU CLAD GRD ROD & 4"X12" GND BAR
- Count: 1
Riser
Area: "Typical - Building All Electrical Riser Rooms"
COMMON ASSEMBLIES/GROUNDING/GND = #3/0 & 1" CONDUIT - EMT
- Length: 15
- Count: 1
Telecom Ground Bridge
Use only where shown.
COMMON ASSEMBLIES/GROUNDING/TELE/DATA GND BRIDGE, ..., W/ COVER & (60') #6 THHN GREEN