88 lines
3.0 KiB
Markdown
88 lines
3.0 KiB
Markdown
---
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id:
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aliases:
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- nec-215
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tags:
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- authorship/other
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- destiny/uncertain
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- status/incomplete
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- topic/electrical
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- type/encyclopedia
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title: Article 215 Feeders
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---
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# Article 215 Feeders
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## 215.1 Scope.
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This article covers the installation requirements, overcurrent protection requirements, minimum size, and ampacity of conductors for
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feeders.
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Exception:
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Feeders for electrolytic cells as covered in 668.3(C)(1) and (C)(4).
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#### 215.2 Minimum Rating and Size.
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#### 215.2(A) Feeders Not More Than 1000 Volts.
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#### 215.2(A)(1) General.
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Feeder conductors shall have an ampacity
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not less than the larger of 215.2(A)(1)(a) or (A)(1)(b)
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and shall comply with 110.14(C).
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* (a) Where a feeder supplies continuous loads
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or any combination of continuous and noncontinuous loads,
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the minimum feeder conductor size shall have an ampacity
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not less than the noncontinuous load plus 125 percent of the continuous load.
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* (b) The minimum feeder conductor size
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shall have an ampacity not less than the maximum load to be served
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after the application of any adjustment or correction factors
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in accordance with
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[[nfpa-70_310_conductors_for_general_wiring#310.14 Ampacities for Conductors Rated 0 Volts – 2000 Volts.|310.14]].
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Exception No. 1:
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If the assembly, including the overcurrent devices protecting the feeder(s),
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is listed for operation at 100 percent of its rating,
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the ampacity of the feeder conductors shall be permitted to be not less
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than the sum of the continuous load plus the noncontinuous load.
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Exception No. 2:
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Where a portion of a feeder is connected at both its supply and load ends
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to separately installed pressure connections as covered in 110.14(C)(2),
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it shall be permitted to have an ampacity
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not less than the sum of the continuous load plus the noncontinuous load.
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No portion of a feeder installed under this exception
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shall extend into an enclosure containing either the feeder supply
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or the feeder load terminations, as covered in 110.14(C)(1).
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Exception No. 3:
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Grounded conductors that are not connected to an overcurrent device
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shall be permitted to be sized at 100 percent
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of the continuous and noncontinuous load.
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Informational Note No. 1:
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See Examples D1 through D11 in Informative Annex D.
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Informational Note No. 2:
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Conductors for feeders, as defined in Article 100,
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sized to prevent a voltage drop exceeding 3 percent
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at the farthest outlet of power, heating, and lighting loads,
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or combinations of such loads,
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and where the maximum total voltage drop on both feeders and branch circuits
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to the farthest outlet does not exceed 5 percent,
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will provide reasonable efficiency of operation.
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Informational Note No. 3:
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See 210.19(A), Informational Note No. 4, for voltage drop for branch circuits.
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#### 215.2(A)(2) Grounded Conductor.
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The size of the feeder circuit grounded conductor
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shall not be smaller than that required by 250.122,
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except that 250.122(F) shall not apply
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where grounded conductors are run in parallel.
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Additional minimum sizes shall be as specified in 215.2(A)(3)
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under the conditions stipulated.
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