Mike Dolt Enterprises
Mike Dolt Enterprises
User: Lepton, Location: Dallas, Tx
Asked on: Tuesday, March 29, 2011 at 6:53 pm EDT
Answered on: Tuesday, May 14, 2024 at 3:27 am EDT
Question: NEC 2008: 400A 240V single phase service (Farm) - Utillity wants a owner disconnect so that they can stop running out to pull the meter base. Owner said OK. We go from meter base to 2P disconnect to power distribution block to multiple (4 to 6 eventually) panels with CB disconnects (125 to 200A). Owner purchased a non-fused disconnect. Does the disconnect have to be fused. Local inspector thinks so but she can't find it find it in the code.
NEC 2008Article 230230.90 Overcurrent Protection.(A) Protection of Conductors and Equipment. Conductors and equipment shall be protected from overcurrent in accordance with their ampacities and in accordance with the articles of this Code pertaining to each specific condition.
230.70 Overcurrent Protection.(A) Feeders. Feeders shall have overcurrent protection at their origin in accordance with the requirements of the article applicable to the specific type of feeder used.230.71 Overcurrent Protection.(A) General. All conductors, other than grounding conductors, shall be protected from overcurrent in accordance with their ampacities by listed overcurrent protective devices.
Exception
As permitted by 230.82, 230.94, 430.52, or 440.
22.
Conclusion:
The disconnect switch at the origin of the service, in this case, the main disconnect, must be fused according to the code. The exception listed above does not apply to this situation since it does not fall under any of the specified exceptions. Therefore, the main disconnect must be fused according to the ampacity of the conductors Flag for review