vault backup: 2025-12-10 16:47:02
This commit is contained in:
@@ -55,6 +55,8 @@ and costed a job half a million in profit,
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what I took away was that we sold high-risk scope
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what I took away was that we sold high-risk scope
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without knowing what was required _and without qualification_.
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without knowing what was required _and without qualification_.
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***
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Others have suggested creating new assemblies grouped by manufacturer,
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Others have suggested creating new assemblies grouped by manufacturer,
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which I'm not a fan of.
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which I'm not a fan of.
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While it's true that similar implementations
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While it's true that similar implementations
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+2
-2
@@ -77,9 +77,9 @@ then quickly release the first, letting the second ring.
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}
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}
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```
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```
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It is possible to add "H" and "Po." markers,
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It is _possible_ to add "H" and "Po." markers,
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but the syntax is ugly.
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but the syntax is ugly.
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They are not ubiquitous anyway.
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They are not ubiquitous or especially helpful anyway.
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### String Bending
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### String Bending
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+3
-23
@@ -1,34 +1,14 @@
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---
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---
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id:
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id:
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aliases: []
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aliases: []
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title: Conduit Sizing
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tags:
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tags:
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- authorship/original
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- destiny/fleeting
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- destiny/fleeting
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- status/incomplete
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- status/incomplete
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- topic/construction/electrical
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- topic/construction/electrical
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- type/encyclopedia
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- type/encyclopedia
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- authorship/original
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title: Conductor Sizing
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---
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---
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# Conduit Sizing
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# Conduit Sizing
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Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables
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![[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]]
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| Number of Conductors and/or Cables | Cross-Sectional Area (%) |
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| ---------------------------------- | ------------------------ |
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| 1 | 53 |
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| 2 | 31 |
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| Over 2 | 40 |
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> [!info] Informational Note No. 1:
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> Table 1 is based on common conditions of proper cabling and alignment of conductors
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> where the length of the pull and the number of bends are within reasonable limits.
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> It should be recognized that, for certain conditions,
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> a larger size conduit or a lesser conduit fill should be considered.
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> [!info] Informational Note No. 2:
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> When pulling three conductors or cables into a raceway,
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> if the ratio of the raceway (inside diameter)
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> to the conductor or cable (outside diameter)
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> is between 2.8 and 3.2, jamming can occur.
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> While jamming can occur when pulling four or more conductors or cables into a raceway,
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> the probability is very low.
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@@ -0,0 +1,36 @@
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---
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id:
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aliases:
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- nec-ch9
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title: Chapter 9 Tables
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tags:
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- authorship/other
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- destiny/permanent
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- exclude-from-word-count
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- status/incomplete
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- topic/construction/electrical
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- type/media/reference
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---
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# Chapter 9 Tables
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## Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables
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| Number of Conductors and/or Cables | Cross-Sectional Area (%) |
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| ---------------------------------- | ------------------------ |
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| 1 | 53 |
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| 2 | 31 |
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| Over 2 | 40 |
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> [!info] Informational Note No. 1:
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> Table 1 is based on common conditions of proper cabling and alignment of conductors
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> where the length of the pull and the number of bends are within reasonable limits.
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> It should be recognized that, for certain conditions,
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> a larger size conduit or a lesser conduit fill should be considered.
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> [!info] Informational Note No. 2:
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> When pulling three conductors or cables into a raceway,
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> if the ratio of the raceway (inside diameter)
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> to the conductor or cable (outside diameter)
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> is between 2.8 and 3.2, jamming can occur.
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> While jamming can occur when pulling four or more conductors or cables into a raceway,
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> the probability is very low.
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@@ -195,7 +195,9 @@ title: "NFPA 70: National Electric Code"
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* [[nfpa-70_830|830 Network-Powered Broadband Communications Systems]]
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* [[nfpa-70_830|830 Network-Powered Broadband Communications Systems]]
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* [[nfpa-70_840|840 Premises-Powered Broadband Communications Systems]]
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* [[nfpa-70_840|840 Premises-Powered Broadband Communications Systems]]
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## Chapter 9 Tables
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***
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* [[nfpa-70_ch09|Chapter 9 Tables]]
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* [[nfpa-70_anx-a|Annex A: Product Safety Standards]]
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* [[nfpa-70_anx-a|Annex A: Product Safety Standards]]
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* [[nfpa-70_anx-b|Annex B: Application Information for Ampacity Calculation]]
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* [[nfpa-70_anx-b|Annex B: Application Information for Ampacity Calculation]]
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