---
id:
aliases: []
title: "2026-02-05 10:14:01"
tags:
  - authorship/original
  - destiny/permanent
  - status/draft
  - type/periodic/timestamped
dg-publish: true
daily: "[[2026-02-05]]"
weekly: "[[2026-W06]]"
monthly: "[[2026-02]]"
quarterly: "[[2026-Q1]]"
yearly: "[[2026]]"
---
# 2026-02-05 10:14:01

## Mechanical Connection Selection

Relevant to [[electrical-takeoff]],
sourced from Joel Jansen's OneNote Takeoff Notes "Mechanical Connections".

Ben says he has never used any PVC assembly except .../`PVC - ...`.

### NM Connections

* .../`NM CABLE ASSEMBLIES`

Type III, IV, and V construction.
Usually only 6 AWG and smaller;
EMT is expected to be cheaper for larger sizes.

### MC Connections

* .../`MC CABLE ASSEMBLIES`

Type I and II construction.

> [!quote] Paraphrased from Source
> Usually only short runs,
> otherwise use PVC if possible.

> [!important] 
> Note that MC cable may be forbidden for this application.
> > [!quote] Hampton Roads Navy UH - Newport News, Project Specifications
> > MC cable shall not be allowed for wiring to mechanical equipment
> > except for within the dwelling units.

### EMT Connections

* .../`EMT SS - ...`
* .../`EMT COMP - ...`

May be preferred for equipment in the same electrical room
as the panel feeding it,
otherwise treat as last resort,
preferring MC or PVC.

### PVC Connections

* .../`PVC - ...`

Use where equipment disconnect is not integral.

* .../`PVC - ... - PVC CEILING BOX`

J-box in the ceiling for mechanical connections,
or where a motor-rated switch is shown.

* .../`PVC - ... - STL BOX & EXT RING`

Use for equipment powered from a wall mount j-box

* .../`PVC - ... - EMT DROP`

> Assembly Note: Does not include j-box

Use in lieu of .../`PVC - ...`
where drop would be exposed
if PVC is not permitted to be exposed.

> Also use for J-Boxes for Heaters.

> [!example]
> directional unit heater shown with connection to a flush wall mount j-box

* .../`PVC - ... - EMT RISE`

> Assembly Note: Does not include j-box

> Use if panels are located on level below panel.
> EMT covers vertical transition for exposed conduit

* .../`PVC - MECH CONNECTION - SGL REC`

* .../`PVC - STL BOX W/ EXT RING & COVER`

> For garage heaters, no labor/power term
