service disconnecting means shall be installed in accordance with 230.70(A)(l), (A)(2), and (A)(3). To me if the disconnect for the building was far from the building, it is not “nearest.” I love a “vigorous debate,” The wiring methods shall comply with the additional installation requirements in (1) through (4) NEC Article 250.118 Types of Equipment Grounding Conductors That’s why separate motor overload protection is required [430.32(A)(1)]. For a motor disconnecting means, you can use any of the following if they have a horsepower rating not less than the motor rating: Article 440 includes some changes for air conditioners, beginning with cord-connected room air conditioners. One could be misled to believe that the additional shutdown means is not required. Grasp the pull-out tab, if your unit has one, and pull until it comes free of the disconnect housing. Article 450 doesn’t go into acceptance testing or maintenance. Article 430 requires motors to have a lockable disconnect within sight. 424 covers them all. You Can Also Inspect Elements Via Right Click, Or Ctrl+Shift+I / Cmd+Opt+I. This illustration gives a good graphical representation of which Parts of Art. How you apply the requirements of 422.31 depends on the VA rating and horsepower rating of the appliance. A second issue involves sizing the motor branch circuit overcurrent protection. Included in this category are circuit breakers, cutouts, disconnecting (or isolating) switches, disconnecting means, and interrupter switches. When a circuit breaker is designed to also be routinely used as an on-off switch to control 277 volt florescent luminaires they are marked SWD, for switch duty. It contains the controls for the main energy supplier of the air conditioner, like the breakers and fuses. Highlighted by world-renowned electric code guru Mike Holt in a live Facebook event back in April 2020, the update affects sections 690.13A and 690.15(A) on locations and includes this language regarding the knife-blade switch disconnection enclosures: “Where disconnecting means of systems above 30 V are readily accessible to unqualified persons, any enclosure … That used to be a confusing aspect of Art. Isolated (as applied to location). Not all of this article applies to electricians in the field though, because Part IV is for manufacturers. 2): The manual controls on the room air conditioner are readily accessible and within 6 ft of the floor, or; A readily accessible disconnecting means is within sight from the room air conditioner. Exception: Installations that comply with 690.3J(E) shall be permitted to have the disconnecting means located re A disconnecting means shall be provided in the supply circuit. This Section indicates an additional “disconnecting means” is not required if the disconnecting means for the exterior generator is in accordance with Sec. Remember, an overload isn’t the same thing as a short circuit or ground fault. We just ran through an overview of changes to eight NEC articles. What is the difference between a fusible and non fusible disconnect? The motors for fixed electric space-heaters are now considered a continuous load [424.3(B)]. In the 2011 NEC, revision of 422.31 addresses the disconnection of permanently connected appliances in the following subsections: Has the sheer number of pages in Art. Flip the power switch from "On" to "Off" if your disconnect is a switch and not a pull-out tab. The disconnecting means shall comply with 690.13(B) and (C) and 690.15(A) and (B). What is the difference between a circuit breaker and a disconnect switch? The Scope section for Art. The wiring methods shall comply with the additional installation requirements in 690.31(G)(1) through (4). What's the difference between Koolaburra by UGG and UGG? Select one: A. spabazaar.com. Where circuits are embedded in built-up, laminate, Subsequently, question is, what is an AC disconnect? Although there were no documented injuries to warrant this change, it’s obvious that this requirement should enhance safety.
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