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vault backup: 2026-04-23 17:46:59

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Zane Meyers
2026-04-23 17:46:59 -04:00
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nfpa-70_215_feeders.md
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@@ -95,7 +95,11 @@ The feeder conductor ampacity shall not be less than that of the service conduct
#### 215.2(B) Feeders over 1000 Volts.
The ampacity of conductors shall be in accordance with 310.14 and 311.60 as applicable. Where installed, 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. Feeder conductors over 1000 volts shall be sized in accordance with 215.2(B)(1), (B)(2), or (B)(3).
The ampacity of conductors
shall be in accordance with [[nfpa-70_310_conductors_for_general_wiring#310.14 Ampacities for Conductors Rated 0 Volts -- 2000 Volts.|310.14]]
and [[nfpa-70_311_mv-conductors#311.60 Ampacities of Conductors.|311.60]]
as applicable.
Where installed, 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. Feeder conductors over 1000 volts shall be sized in accordance with 215.2(B)(1), (B)(2), or (B)(3).
##### 215.2(B)(1) Feeders Supplying Transformers.
@@ -108,13 +112,16 @@ when only transformers are supplied.
The ampacity of feeders supplying a combination
of transformers and utilization equipment
shall not be less than the sum of the nameplate ratings of the transformers
and 125 percent of the designed potential load of the utilization equipment
shall not be less than the sum
of the nameplate ratings of the transformers
and 125 percent of the designed potential load
of the utilization equipment
that will be operated simultaneously.
##### 215.2(B)(3) Supervised Installations.
For supervised installations, feeder conductor sizing shall be permitted
For supervised installations,
feeder conductor sizing shall be permitted
to be determined by qualified persons under engineering supervision
in accordance with 310.14(B) or 311.60(B).
Supervised installations are defined as those portions of a facility