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A set of conductors feeding a single load, or each set of conductors feeding separate loads, shall be permitted to be connected to a transformer secondary, without overcurrent protection at the secondary, as specified in 240.21(C)(1) through (C)(6). NEC 240.21 Location in Circuit. Over current 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 (G). No conductor supplied under the provisions of 240.21(A) through (G) 2018-06-13 practicable to the battery terminals in an unclassified location, (NEC 480.5, 706.7) Battery circuit and equipment shall be protected by overcurrent protective devices as close as practicable to the storage battery terminals in accordance with the requirements of NEC Article 240, (NEC 240.21(H), 705.65(A)) 2006-03-24 2006-01-16 one at a time. NEC 430.53 (D) addresses the conductor sizes used in group motor installations and is the starting point for compliance. It applies in all cases for all group motor installations.
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NEC 240.21, with some exceptions, requires overcurrent protection in each ungrounded conductor to be located where the conductors connect to the load False A conductor, other than a service conductor, that has overcurrent protection ahead of its point of supply that exceeds the value permitted for similar conductors that is protected as described elsewhere in 240.4 best describes ____? This revision to 240.21(B)(1) was meant to clarify the application of the previous requirement for 3.0 m (10 ft) or less feeder taps and to state the specific type of “device” as an overcurrent device. This clarification was needed since somethingas simple as a conductor would fit within the 2011 NEC NEC 240.21 Overcurrent devices are readily accessible and not exposed to physical damage. NEC 240.24(A); 240.24(C) Overcurrent devices are not installed in bathrooms, over steps, or in the vicinity of ignitable material.
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Battery conductors, for which you install the OCPDs as close as practicable to the battery terminals 240.21 (H)]. OCPDs must be readily accessible [240.24 (A)].
Vad betraktas som "service" för NEC 225.30? - AllaFragor
A tap connection can only be made where the current rating of the tap connection to the TVSS is greater than 1/10 of 2015-06-12 NEC 240.21. Location in Circuit.
A tap connection can only be made where the current rating of the tap connection to the TVSS is greater than 1/10 of
NEC 240.21. Location in Circuit. NEC 240.23. Change in Size of Grounded Conductor* NEC 240.30.
protected against overcurrent, according to their ampacities, specified in NEC Article receive their supply accordance with NEC Article 240.21(A) through (H). NEC 240.21 Location in Circuit. Overcurrent protection shall be provided in each ungrounded circuit conductor and shall be located at the point where. 31 Jul 2017 C – NEC Section 240.21(B)(2) requires that feeder tap conductors must not be over 25 feet in length and the ampacity of the tap conductor must According to the National Electrical Code, a tap conductor is defined per NEC 240.2 as a conductor, [Transformer Secondary Conductors] of NEC 240.21.
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. As the submitter of this proposal pointed out in his substantiation, the only 25-foot tap rule for transformer secondary conductors in the 1999 NEC existed in 240-21(c)(3) for “industrial installations only.”
The NEC does permit tap conductors to have overcurrent protection set at a value that greatly exceeds the ampacity of the conductors, but this is only permitted under specific conditions outlined in 240.21. Before we get into the details of 240.21, you must understand that a tap conductor isn't permitted to supply another tap conductor.
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View More > Deer Feeder Motor: NEC 240.21 Location in Circuit. Over current 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 (G).