vault backup: 2025-07-23 16:43:54

new-additions/takeoff/feeders.md

@@ -1,6 +1,44 @@
+---
+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"