---
id:
aliases: []
tags:
  - destiny/permanent
  - occupational
  - status/incomplete
  - type/guide
title: Wiring Methods Selection
---
# Wiring Methods Selection

Seek to use the cheapest method,
as determined by Senior Construction Estimator
and Database Administrator,
as allowed for the situation.

![[pre-takeoff-research#Requirement Precedence]]

## By Construction Type

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)

#### Fittings

Set-screw < compression

> [!info]
> EMT has a third coupling type "indenter",
> which are crimped onto the conduit using a special tool.
> These are usually only mentioned in specifications
> to say that they are unacceptable.

> [!info] Edge Case: Vanderbilt Central Neighborhood Residential College
>
> > [!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.
>
> > [!quote] Joel Jansen via Microsoft Teams @ 2025-10-15 09:33 AM
> > use set screw 🙂

### Rigid Polyvinyl Chloride Conduit (PVC)

Not usually permissible exposed indoors in any construction,
except in Florida.

May require rigid stub-ups in certain cases,
which could make EMT more cost-effective.
Consult with the Senior Construction Estimator in this case.

## By Use-Case

### Multi-Circuit Homeruns

> [!quote] Art Baldwin (pp.)
> Multi-circuit MC is not cost-effective
> when considering the difficulty of rework.
> Use conduit, even EMT if necessary.

## By Market Type

### Assisted Living

MC-AP may be required.

## Searching Specifications

> [!info] Example Specs Relevant to Wiring Methods Selection
> * 26XXXX - Raceway And Boxes For Electrical Systems
> * 26XXXX - Conduits For Electrical Systems
> * 26XXXX - Underground Ducts And Raceways For Electrical Systems
> 
> * 26XXXX - Low-Voltage Electrical Power Conductors And Cables
> 
> * 26XXXX - General Requirements For Electrical
> * 26XXXX - Common Work Results For Electrical