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nfpa-70_215_feeders.md

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+---
+id:
+aliases:
+  - nec-215
+tags:
+  - authorship/other
+  - destiny/uncertain
+  - status/incomplete
+  - topic/electrical
+  - type/encyclopedia
+---
+# Article 215 Feeders
+
+## 215.1 Scope.
+
+This article covers the installation requirements, overcurrent protection requirements, minimum size, and ampacity of conductors for
+feeders.
+
+Exception:
+Feeders for electrolytic cells as covered in 668.3(C)(1) and (C)(4).
+
+#### 215.2 Minimum Rating and Size.
+
+#### 215.2(A) Feeders Not More Than 1000 Volts.
+
+#### 215.2(A)(1) General.
+
+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).
+
+- (a) Where a feeder supplies continuous loads
+    or any combination of continuous and noncontinuous loads,
+    the minimum feeder conductor size shall have an ampacity
+    not less than the noncontinuous load plus 125 percent of the continuous 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]].
+
+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.
+
+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).
+
+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.
+
+Informational Note No. 1:
+See Examples D1 through D11 in Informative Annex D.
+
+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.
+
+Informational Note No. 3:
+See 210.19(A), Informational Note No. 4, for voltage drop for branch circuits.
+
+#### 215.2(A)(2) Grounded Conductor.
+
+The size of the feeder circuit grounded conductor
+shall not be smaller than that required by 250.122,
+except that 250.122(F) shall not apply
+where grounded conductors are run in parallel.
+
+Additional minimum sizes shall be as specified in 215.2(A)(3)
+under the conditions stipulated.