93 lines
2.1 KiB
Markdown
93 lines
2.1 KiB
Markdown
---
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id: 2026-02-05T10:14:01-0500
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title: 2026-02-05 10:14:01
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tags:
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- occupational/takeoff
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- status/draft
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daily: "[[2026-02-05]]"
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---
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# 2026-02-05 10:14:01
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## Mechanical Connection Selection
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Relevant to [[electrical-takeoff]],
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sourced from [[joel-jansen]]'s OneNote Takeoff Notes "Mechanical Connections".
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Ben says he has never used any PVC assembly except .../`PVC - ...`.
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### NM Connections
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* .../`NM CABLE ASSEMBLIES`
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Type III, IV, and V construction.
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Usually only 6 AWG and smaller;
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EMT is expected to be cheaper for larger sizes.
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### MC Connections
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* .../`MC CABLE ASSEMBLIES`
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Type I and II construction.
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> [!quote] Paraphrased from Source
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> Usually only short runs,
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> otherwise use PVC if possible.
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> [!important]
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> Note that MC cable may be forbidden for this application.[^1]
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[^1]: > [!quote] [[hampton-roads-navy_newport-news|Hampton Roads Navy UH - Newport News]], Project Specifications
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> MC cable shall not be allowed for wiring to mechanical equipment
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> except for within the dwelling units.
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### EMT Connections
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* .../`EMT SS - ...`
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* .../`EMT COMP - ...`
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May be preferred for equipment in the same electrical room
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as the panel feeding it,
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otherwise treat as last resort,
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preferring MC or PVC.
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### PVC Connections
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* .../`PVC - ...`
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Use where equipment disconnect is not integral.
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* .../`PVC - ... - PVC CEILING BOX`
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J-box in the ceiling for mechanical connections,
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or where a motor-rated switch is shown.
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* .../`PVC - ... - STL BOX & EXT RING`
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Use for equipment powered from a wall mount j-box
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* .../`PVC - ... - EMT DROP`
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> Assembly Note: Does not include j-box
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Use in lieu of .../`PVC - ...`
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where drop would be exposed
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if PVC is not permitted to be exposed.
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> Also use for J-Boxes for Heaters.
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> [!example]
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> directional unit heater shown with connection to a flush wall mount j-box
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* .../`PVC - ... - EMT RISE`
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> Assembly Note: Does not include j-box
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> Use if panels are located on level below panel.
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> EMT covers vertical transition for exposed conduit
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* .../`PVC - MECH CONNECTION - SGL REC`
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* .../`PVC - STL BOX W/ EXT RING & COVER`
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> For garage heaters, no labor/power term
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