vault backup: 2025-10-21 17:03:44

pre-takeoff-research.md

@@ -10,12 +10,67 @@ title: Pre-Takeoff Research
 ---
 # Pre-Takeoff Research
 
+## Requirement Precedence
+
+In case of conflict:
+
+Requirements of the plans and specs
+are superseded by the terms of our proposal,
+which are superseded by specific direction from the bid team.
+
+<!--
+Where NEC, IBC, and other applicable codes fall in this hierarchy
+is subject to some debate.
+-->
+
 ## Wiring Method Selection
 
-> [!cite] Vanderbilt Central Neighborhood Residential College - Project Specifications (pp.)
-> Fittings for Type EMT Duct Raceways:
-> * Coupling Method: Compression coupling or Setscrew coupling.
->   Setscrew couplings with only single screw per conduit are unacceptable.
+See [[wiring-method-selection]].
+
+## Voltage Drop
+
+Unless explicitly stated in the plans or specs,
+conductors are to be sized according to the relevant schedule,
+without respect for voltage drop.
+
+### Feeders and Unit Subfeeds
+
+<!-- TODO: -->
+
+### Branch Circuits
+
+If voltage drop is to be considered in takeoff,
+Use the table provided in the drawings.
+If no table is provided, use the following:
+
+| Wire Size | Max Length |
+| ---------:| ----------:|
+|       #12 |      100ft |
+|       #10 |      200ft |
+|        #8 |     >200ft |
+
+## Wiring Device Selection
+
+Wiring devices and their wall plates are a common target of [[gold-plating]].
+
+* Device grade: commercial < specification
+* Minimum rating for general-use receptacles: N5-15R < N5-20R
+* Device form-factor: Duplex/toggle < Decora
+* Device cover plate material: Plastic < nylon < aluminum < stainless steel
+* Device cover plate size: standard < mid-size < oversize "jumbo"
+* Device cover plate attachment: Standard < screwless
+* Floor box material: Steel < cast iron
+* Floor box cover plate material: plastic < brass < aluminum
+
+> [!info] Search Terms Relevant to Wiring Device Selection 
+> * "Decora"
+
+> [!info] Example Specs Relevant to Wiring Device Selection[^1]
+> * 26XXXX - Wiring Devices
+> * 26XXXX - Boxes And Covers For Electrical Systems
+> * 26XXXX - Lighting Control Devices
+> * 26XXXX - Network Lighting Controls
+
+[^1]: Specification section titles and scope may vary greatly between projects.
+  The examples provided are not an exhaustive list.
 
-> [!quote] Joel Jansen via Microsoft Teams @ 2025-10-15 09:33 AM
-> use set screw 🙂