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Protection of Flexible Cords, Flexible Cables, and Fixture Wires. 240.6. Taps can be made at conductors without overcurrent protection at the tap as noted in section 240.21(B)(1) through (5) below. 2017-10-04 NEC 240.21, with some exceptions, requires overcurrent protection in each ungrounded conductor to be located where the conductors connect to the load. True False: False : 2. NEC 240.21(C)(6) only requirements are restricting the maximum length of the secondary conductors to 25 feet in addition to the following conditions, (1) the secondary conductors must have an ampacity that is equal to or greater than the ratio of New in the 2002 NEC for transformer secondary conductors is 240.21(C)(6), which will now clearly permit a 25-foot transformer secondary conductor taps in a commercial installation.

Nec 240.21

Table 250.102(C)(1) Grounded Conductor, Main Bonding Jumper, System Bonding Jumper, and Supply-Side Bonding Jumper for Alternating-Current Systems. Click below to receive the free PDF and a supporting video excerpt from the NEC Training. To download the Table 250.102(C)(1), Click Here To download NEC Handbook Thanks to the NEC Connect for sharing Table 250.102(C)(1) and Section 240.21(A)&(B). Table 250.102(C)(1) Grounded Conductor, Main Bonding Jumper, System Bonding Jumper, and Supply-Side Bonding Jumper for Alternating-Current Systems.

240.21(C)(3) allows the secondary conductors to be up to 25' in length if the transformer is installed in a industrial location.

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Table 250.102(C)(1) Grounded Conductor, Main Bonding Jumper, System Bonding Jumper, and Supply-Side Bonding Jumper for Alternating-Current Systems. Click below to receive the free PDF and a supporting video excerpt from the NEC Training. To download the Table 250.102(C)(1), Click Here To download NEC Handbook NEC 240.21 is about the location of the overcurrent device, not the need for it. I bring up these three points because it’s easy to become so involved in the “location” rules (240.21) that you may misinterpret them into meaning that secondary conductor overcurrent protection is not required at all!

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240.21(B)(2) Taps Not Over 7.5 m (25 ft) Long. (Schedule 80 Rigid Nonmetallic Conduit) NEC 2011 Transformer Secondary Conductors 240.21(C)(6) (10min:42sec) siavash533 694 مشاهده NEC 240.21, with some exceptions, requires overcurrent protection in each ungrounded conductor to be located where the conductors connect to the load. True 240.21(B) Feeder Taps. ○ Conductors shall be permitted to be tapped, without overcurrent protection at the tap, to a feeder as specified in. 240.21(B)(1) through NEC 240.21, with some exceptions, requires overcurrent protection in each ungrounded conductor to be located where the conductors connect to the load.

(or Part VIII of Article (NEC 240.21 B). 18. Provide a note stating that any conductors exposed to sunlight shall be listed as sunlight resistant. (NEC 300.6 C1, 310.8 D). Master The NEC Enjoy this graphic on Transformer Secondary Conductor rules in 240.21(C)(6). P.S.- If you do not like itLOL..Make Your Own!.. Feeder Taps, NEC 2011 - 240.21(B)(1) (13min:22sec) · Electrical Feeder and Branch circuit description · Follow Electricity's Journey Through the Transmission [240.21(C)(2)] characteristics and appropriate NEC® sections should be considered.
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FALSE Code (NEC) 2008, and is detailed in Article 240.21(B) Feeder Taps. According to Article 240.21(B) Feeder Taps, “conductors shall be permitted to be tapped,.

Per NEC 240.21, overcurrent protection shall be provided in each ungrounded circuit conductor and shall be located at the point where the conductors receive their supply except as specified in 240.21(A) through (H) true or false 10.The NEC permits a set of conductors feeding a single load, or each set of conductors feeding separate loads, to be connected to a transformer secondary without overcurrent protection at the secondary, as specified in ?
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Table 250.102(C)(1) Grounded Conductor, Main Bonding Jumper, System Bonding Jumper, and Supply-Side Bonding Jumper for Alternating-Current Systems. Click below to receive the free PDF and a supporting video excerpt from the NEC Training. In 240.21(A) Branch-Circuit Conductors, we find a method of performing taps for branch circuits, but note that you are referred back to Article 210.19 and 210.20 for the exact applications. In subsection (B) we start to deal with the Feeder Taps, which are further broken down to five conditions. There was a change to 240.21(C)(3) in the 2014 NEC. Before the 2014 edition, this section started with, “For industrial installations only … .” Now, this section starts with, “For the supply of switchgear or switchboards in industrial installations only .” This was not really a change, but a clarification. For these requirements, NEC 240.21(C) shall apply for different scenarios depending on the length of the secondary conductors.