45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
---
|
|
id:
|
|
aliases: []
|
|
tags: []
|
|
---
|
|
# Feeders
|
|
|
|
* Use 15ft adders for site runs
|
|
(primaries, secondaries, etc.),
|
|
as opposed to standard 10ft adder,
|
|
to account for variability.
|
|
|
|
## 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 |
|
|
|
|
## Sleeving
|
|
|
|
Provide sleeves for all feeder conduits passing through floors.
|
|
|
|
* ID.31 Hilti
|
|
* P = Plastic => Concrete
|
|
* M = Metal => Wood Frame
|
|
* Round 1" to 2"
|