
Transformers Secondary protection | Information by Electrical ...
Jul 31, 2016 · 240.21 (C) (1) Protection by Primary Overcurrent Device. Conductors supplied by the secondary side of a single-phase transformer having a 2-wire (single-voltage) secondary, …
Receptacle Overcurrent Rating | Information by Electrical …
Jul 12, 2019 · 630.12 Overcurrent Protection. Overcurrent protection for arc welders shall be as provided in 630.12 (A) and (B). Where the values as determined by this section do not …
NEC 240.21 (b) (1) Load side taps "rating" confusion
Nov 22, 2024 · 2020 NEC 240.21 (B) (1) (b) says "Not less than the rating of the equipment containing an overcurrent device (s) supplied by the tap conductors or not less than the rating …
NEC tap rule feeding multiple OCPD's
Feb 27, 2025 · My comment is that the corresponding rule in 240.21 (B) (1) says that the tap ampacity shall be "Not less than the rating of the equipment containing an overcurrent device …
Feeders Vs Branch Circuits | Information by Electrical Professionals ...
Nov 22, 2019 · Branch circuits connect the branch overcurrent device (e.g. branch breaker) to each load. Or to a daisy-chained group of loads, as is the case with receptacle and lighting …
NEC Feeder Definition | Information by Electrical Professionals for ...
Aug 2, 2023 · Feeders are essentially everything between the service equipment and the final overcurrent device. The NEC definition of feeder is “All circuit conductors between the service …
230.72 Grouping of Disconnects | Information by Electrical ...
Oct 3, 2024 · 230.91 specifies that the "service overcurrent device" shall be integral to the "service disconnecting means" or located "immediately adjacent thereto." And the definition of …
80% continuos load | Information by Electrical Professionals for ...
Sep 30, 2014 · 210.20 Overcurrent Protection. Branch-circuit conductors and equipment shall be protected by overcurrent protective devices that have a rating or setting that complies with …
NEC 240.21 Tap Rules - Do Feeder Circuits Require OCP?
Jul 25, 2022 · The ampacity of the tap conductors is not less than one-third of the rating of the overcurrent device protecting the feeding conductors. (feeder OCP required is implied here) …
Over-current protection for A/C | Information by Electrical ...
Sep 23, 2010 · If I understand the question, the breaker can be any size* as long as the over current device isn't larger than that listed on the unit. That is if the breaker isn't your only …