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nfpa-70_215_feeders.md
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@@ -14,14 +14,14 @@ dg-publish: false
---
# Article 215 Feeders
## 215.1 Scope.
### 215.1 Scope.
This article covers the installation requirements, overcurrent protection requirements, minimum size, and ampacity of conductors for feeders.
> [!important] Exception:
> Feeders for electrolytic cells as covered in 668.3(C)(1) and (C)(4).
#### 215.2 Minimum Rating and Size.
### 215.2 Minimum Rating and Size.
#### 215.2(A) Feeders Not More Than 1000 Volts.
@@ -29,7 +29,7 @@ This article covers the installation requirements, overcurrent protection requir
Feeder conductors shall have an ampacity
not less than the larger of 215.2(A)(1)(a) or (A)(1)(b)
and shall comply with 110.14(C).
and shall comply with [[nfpa-70_110_requirements#110.14(C) Temperature Limitations.|110.14(C)]].
* (a) Where a feeder supplies continuous loads
or any combination of continuous and noncontinuous loads,
@@ -37,28 +37,50 @@ and shall comply with 110.14(C).
not less than the noncontinuous load plus 125 percent of the continuous load.
> [!important] Exception No. 1:
> If the assembly, including the overcurrent devices protecting the feeder(s), is listed for operation at 100 percent of its rating, the ampacity of the feeder conductors shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load.
> If the assembly, including the overcurrent devices protecting the feeder(s),
> is listed for operation at 100 percent of its rating,
> the ampacity of the feeder conductors
> shall be permitted to be not less
> than the sum of the continuous load plus the noncontinuous load.
> [!important] Exception No. 2:
> Where a portion of a feeder is connected at both its supply and load ends to separately installed pressure connections as covered in 110.14(C)(2), it shall be permitted to have an ampacity not less than the sum of the continuous load plus the noncontinuous load. No portion of a feeder installed under this exception shall extend into an enclosure containing either the feeder supply or the feeder load terminations, as covered in 110.14(C)(1).
> Where a portion of a feeder is connected
> at both its supply and load ends to separately installed pressure connections
> as covered in [[nfpa-70_110_requirements#110.14(C)(2) Separate Connector Provisions.|110.14(C)(2)]],
> it shall be permitted to have an ampacity not less than the sum of the continuous load plus the noncontinuous load.
> No portion of a feeder installed under this exception
> shall extend into an enclosure containing either the feeder supply
> or the feeder load terminations,
> as covered in [[nfpa-70_110_requirements#110.14(C)(1) Equipment Provisions.|110.14(C)(1)]].
> [!important] Exception No. 3:
> Grounded conductors that are not connected to an overcurrent device shall be permitted to be sized at 100 percent of the continuous and noncontinuous load.
> Grounded conductors that are not connected to an overcurrent device
> shall be permitted to be sized at 100 percent of the continuous and noncontinuous load.
* (b) The minimum feeder conductor size
shall have an ampacity not less than the maximum load to be served
after the application of any adjustment or correction factors
in accordance with
[[nfpa-70_310_conductors_for_general_wiring#310.14 Ampacities for Conductors Rated 0 Volts -- 2000 Volts.|310.14]].
in accordance with [[nfpa-70_310_conductors_for_general_wiring#310.14 Ampacities for Conductors Rated 0 Volts -- 2000 Volts.|310.14]].
%%
Is "maximum load to be served" the same as "demand load"
as used by panel schedules?
%%
> [!info] Informational Note No. 1:
> See Examples D1 through D11 in Informative Annex D.
> [!info] Informational Note No. 2:
> Conductors for feeders, as defined in Article 100, sized to prevent a voltage drop exceeding 3 percent at the farthest outlet of power, heating, and lighting loads, or combinations of such loads, and where the maximum total voltage drop on both feeders and branch circuits to the farthest outlet does not exceed 5 percent, will provide reasonable efficiency of operation.
> Conductors for feeders, as defined in Article 100,
> sized to prevent a voltage drop exceeding 3 percent
> at the farthest outlet of power, heating, and lighting loads, or combinations of such loads,
> and where the maximum total voltage drop on both feeders and branch circuits
> to the farthest outlet does not exceed 5 percent,
> will provide reasonable efficiency of operation.
> [!info] Informational Note No. 3:
> See 210.19(A), Informational Note No. 4, for voltage drop for branch circuits.
> See [[nfpa-70_210_branch-circuits#210.19(A) Branch Circuits Not More Than 600 Volts.|210.19(A)]], Informational Note No. 4,
> for voltage drop for branch circuits.
##### 215.2(A)(2) Grounded Conductor.
@@ -142,7 +164,8 @@ shall be provided prior to the installation of the feeders.
Such a diagram shall show the area in square feet
of the building or other structure supplied by each feeder,
the total calculated load before applying demand factors,
the demand factors used, the calculated load after applying demand factors,
the demand factors used,
the calculated load after applying demand factors,
and the size and type of conductors to be used.
### 215.6 Feeder Equipment Grounding Conductor.