vault backup: 2025-12-10 16:47:02

This commit is contained in:
2025-12-10 16:47:02 -05:00
parent 8cb39aad0e
commit 84969eab26
5 changed files with 46 additions and 26 deletions
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@@ -55,6 +55,8 @@ and costed a job half a million in profit,
what I took away was that we sold high-risk scope what I took away was that we sold high-risk scope
without knowing what was required _and without qualification_. without knowing what was required _and without qualification_.
***
Others have suggested creating new assemblies grouped by manufacturer, Others have suggested creating new assemblies grouped by manufacturer,
which I'm not a fan of. which I'm not a fan of.
While it's true that similar implementations While it's true that similar implementations
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@@ -77,9 +77,9 @@ then quickly release the first, letting the second ring.
} }
``` ```
It is possible to add "H" and "Po." markers, It is _possible_ to add "H" and "Po." markers,
but the syntax is ugly. but the syntax is ugly.
They are not ubiquitous anyway. They are not ubiquitous or especially helpful anyway.
### String Bending ### String Bending
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@@ -1,34 +1,14 @@
--- ---
id: id:
aliases: [] aliases: []
title: Conduit Sizing
tags: tags:
- authorship/original
- destiny/fleeting - destiny/fleeting
- status/incomplete - status/incomplete
- topic/construction/electrical - topic/construction/electrical
- type/encyclopedia - type/encyclopedia
- authorship/original
title: Conductor Sizing
--- ---
# Conduit Sizing # Conduit Sizing
Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables ![[nfpa-70_ch09#Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables|Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables]]
| Number of Conductors and/or Cables | Cross-Sectional Area (%) |
| ---------------------------------- | ------------------------ |
| 1 | 53 |
| 2 | 31 |
| Over 2 | 40 |
> [!info] Informational Note No. 1:
> Table 1 is based on common conditions of proper cabling and alignment of conductors
> where the length of the pull and the number of bends are within reasonable limits.
> It should be recognized that, for certain conditions,
> a larger size conduit or a lesser conduit fill should be considered.
> [!info] Informational Note No. 2:
> When pulling three conductors or cables into a raceway,
> if the ratio of the raceway (inside diameter)
> to the conductor or cable (outside diameter)
> is between 2.8 and 3.2, jamming can occur.
> While jamming can occur when pulling four or more conductors or cables into a raceway,
> the probability is very low.
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@@ -0,0 +1,36 @@
---
id:
aliases:
- nec-ch9
title: Chapter 9 Tables
tags:
- authorship/other
- destiny/permanent
- exclude-from-word-count
- status/incomplete
- topic/construction/electrical
- type/media/reference
---
# Chapter 9 Tables
## Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables
| Number of Conductors and/or Cables | Cross-Sectional Area (%) |
| ---------------------------------- | ------------------------ |
| 1 | 53 |
| 2 | 31 |
| Over 2 | 40 |
> [!info] Informational Note No. 1:
> Table 1 is based on common conditions of proper cabling and alignment of conductors
> where the length of the pull and the number of bends are within reasonable limits.
> It should be recognized that, for certain conditions,
> a larger size conduit or a lesser conduit fill should be considered.
> [!info] Informational Note No. 2:
> When pulling three conductors or cables into a raceway,
> if the ratio of the raceway (inside diameter)
> to the conductor or cable (outside diameter)
> is between 2.8 and 3.2, jamming can occur.
> While jamming can occur when pulling four or more conductors or cables into a raceway,
> the probability is very low.
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@@ -195,7 +195,9 @@ title: "NFPA 70: National Electric Code"
* [[nfpa-70_830|830 Network-Powered Broadband Communications Systems]] * [[nfpa-70_830|830 Network-Powered Broadband Communications Systems]]
* [[nfpa-70_840|840 Premises-Powered Broadband Communications Systems]] * [[nfpa-70_840|840 Premises-Powered Broadband Communications Systems]]
## Chapter 9 Tables ***
* [[nfpa-70_ch09|Chapter 9 Tables]]
* [[nfpa-70_anx-a|Annex A: Product Safety Standards]] * [[nfpa-70_anx-a|Annex A: Product Safety Standards]]
* [[nfpa-70_anx-b|Annex B: Application Information for Ampacity Calculation]] * [[nfpa-70_anx-b|Annex B: Application Information for Ampacity Calculation]]