vault backup: 2025-10-24

wiring-method-selection.md

@@ -6,32 +6,72 @@ tags:
   - occupational
   - status/incomplete
   - type/guide
-title: Wiring Methods Selection
+  - authorship/original
+title: Wiring Method Selection
 ---
-# Wiring Methods Selection
+# Wiring Method Selection
 
-Seek to use the cheapest method,
-as determined by Senior Construction Estimator
-and Database Administrator,
-as allowed for the situation.
+Determine where each wiring method can be used.
 
-![[pre-takeoff-research#Requirement Precedence]]
+NM/SER < PVC < MC < EMT-SS < EMT-Comp < IMC
+
+Below is an example Wiring Method Selection
+for a [[ibc-construction-types#5-Over-1 Construction|podium]] construction.
+
+> [!example]
+> Wire Material:
+> * Less than 100A: CU
+> * 100A and larger: AL
+>
+> Outdoors:
+> * Above-ground: EMT-Comp
+> * Underground: PVC w/ Rigid Elbows
+> 
+> Levels 1-2 (Type IA):
+> * Concealed: MC
+> * Exposed to Structure:
+>     * Up to 2"C: PVC In-Slab
+>     * 2-1/2"C and larger: EMT-SS OH
+> 
+> Levels 3-5 (Type IIIA):
+> * Concealed: NM/SER
+> * Exposed to Structure: PVC OH
+
+## Slab Thickness
+
+Conduits may not be routed through slabs of thickness
+less than 3 times the outer diameter of the conduit.
+
+| Conduit Size | Minimum Slab Thickness (in) |
+| ------------:| ---------------------------:|
+|         1/2" |                         3.0 |
+|         3/4" |                         3.5 |
+|           1" |                         4.0 | 
+|       1-1/4" |                         5.0 |
+|       1-1/2" |                         6.0 |
+|           2" |                         7.5 |
+|           3" |                         9.0 |
+|       2-1/2" |                        10.5 |
+|       3-1/2" |                        12.0 |
+|           4" |                        13.5 |
+|           5" |                        17.0 |
+|           6" |                        20.0 |
+
+## By Finish
+
+Cable type raceways (MC, NM, SE)
+may only be used where they will be concealed from view.
+
+Exception:
+Temporary provisions for unfinished spaces (e.g. core and shell retail)
 
 ## By Construction Type
 
+Nonmetallic-sheathed cables (NM/SER)
+are not permissible in Non-Combustible (Type I, II) constructions.
+
 See [[ibc-construction-types]] for more info.
 
-### Construction Types I, II
-
-Nonmetallic-sheathed cables (NM, SE, etc.)
-are not fire code permissible in these types.
-
-PVC < MC < EMT < IMC < RMC
-
-### Construction Types III, IV, V
-
-NM/SE < PVC < EMT < IMC < RMC
-
 ## By Wiring Method
 
 ### Electrical Metallic Tubing (EMT)