Often the installer and the occupant have no opportunity to communicate, so the proper action for the installer is to mark the circuit disconnects for the areas as shown on the plans. This is fairly easy to do: Go to "Settings" then to "General" and to "About". Electricians will sometimes call _____ "disconnects" or a "disconnecting means". The maximum current draw for the overhead garage door motor must not exceed what? What size grounding-electrode conductor is required for three-phase, four-wire, 120/240-volt delta service? When does the neutral carry two hot conductor's combined load? Green 2. What type of AFCI device is mandatory in the panel where the branch circuit originates? For example, a panel with only 6 breakers. One of the most important NEC requirements (and yet one most often ignored) is 110.22: Identification of Disconnecting Means. Insulated conductors and cables installed in raceways in wet locations above grade shall comply with 310.8(C).. Also, 517.45 covers Essential Electrical Systems for Other Health Care Facilities, which includes dental offices. William Blake, [YOUTUBE]http://www.youtube.com/watch?v=KGzg1Ho9KeI[/YOUTUBE]. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company. A) Electrical cordsB) Three-pronged plugsC) Two-pronged plugsD) Switches New answers Rating 3 Jerrald@22 Electricians will sometimes call switches "disconnects" or a "disconnecting means." Log in for more information. The basic requirements for permission to use cord and plug connections are given in part (A) and state, Flexible cord shall be permitted (1) for the connection of appliances to facilitate their frequent interchange or to prevent the transmission of noise or vibration or (2) to facilitate the removal or disconnection of appliances that are fastened in place where the fastening means and mechanical connections are specifically designed to permit ready removal for maintenance or repair and the appliance is intended or identified for flexible cord connection.. This typically happens because of nails driven into the wire or staples are too tight. An air conditioning unit is installed outdoors where it is subjected to the weather. T/F - Any conductors can run through junction boxes that serve luminaries, F - Conductors not used for the luminaires cannot be run through luminaire junction boxes unless the boxes are labeled for through wiring, T/F - Conventional recessed luminaires can be used for sloped ceiling. (A) General. If this cannot be done, is type NM cable in electrical metallic tubing acceptable? (B) Single-Pole Units. determine the mass of each gas and the apparent gas constant of the mixture. Rapid Start 2. The disconnecting means for a permanently connected water heater must comply with 422.31(B). What must be labeled on the box in order to support a ceiling fans weight? Open all poles simultaneously 3. T/F - Both the red and black wire can be connected to the same phases in a multiwire circuit, T/F - AFCI protection is not required in the unfinished basement area. The color of this conductor with the higher voltage to ground is orange or is identified by other effective means. b)sketch the process on a p-v diagram. for review (Will be highlighted on the review page) I'll cheat here because I saw your other question: This will allow calls to ring through to your line as normal. Is a properly sized three-wire dryer cord and receptacle acceptable as the disconnecting means for an electric water heater in a dwelling unit? Although it was not clear in the 2005 edition of the NEC, some electrical inspectors and authorities having jurisdiction (AHJ) required AFCI protection for outlets in bedroom clothes closets. 422.30 General. Urgent! The feeder or branch-circuit disconnecting enclosures, or in or on a switchboard or switchgear. What label must be on a receptacle is located outside without a roof? What is the maximum allowable current "leakage" for cord-and-plug appliances? six operations of the hand. The best answers are voted up and rise to the top, Not the answer you're looking for? Does the meter count as a disconnecting means? You can refer to the answers, The following summaries about watsonville flea market fairgrounds will help you make more personal choices about more accurate and faster information. White (W) 4. Can someone elaborate on this? b. DNA $\hspace{2.2cm}$d. , I need an idea as to what I can write that uses these. I make all the electrons line up for their Flu shots. Disconnecting means means a de- vice, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply. Also called the service disconnect, this is the first disconnect device after the utility meter. What is the maximum weight that a ceiling fan box can support? NEC 517.30 covers Essential Electrical Systems for Hospitals, while 517.40 covers Essential Electrical Systems for Nursing Homes and Limited Care Facilities. The disconnecting means for each supply permitted by 225.30 shall consist of not more than six switches or six circuit breakers mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard or switchgear. The following summaries about electricians will sometimes call what disconnects will help you make more personal choices about more accurate and faster information. linear motionD. Section 210.8(B)(5) requires GFCI protection for all 15- and 20-ampere, 125-volt receptacles in kitchens in other than dwelling units. What is the maximum length of a hallway without requiring a receptacle? A device, or group of devices, or Come join the discussion about trade knowledge, tools, certifications, wiring, builds, scales, reviews, accessories, classifieds, and more! A load where the maximum current is expected for 3 hours or more. How many grandchildren does Joe Biden have? Flexible cords are permitted on appliances that qualify under Section 422.16. calculated load to be supplied []. Saving the world, one backstabbed receptacle at a time. What do electricians call disconnects? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. capable of individual operation shall be permitted on multiwire 5/8" - The number following the T is divided by 8, T/F - If the voltage in a circuit it doubled then the amperage is also doubled. , dvantage B. rotary motionC. Please go to the recent issues to find up-to-date content. George W. Flach was a regular contributing Code editor for Electrical Contractor magazine, serving for more than 40 years. Section 230.71 (A) of the NEC allows for up to six main disconnects grouped together or in a common enclosure. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. An exception allows the conductor with the higher voltage to ground to occupy a different position when the switchboard or panelboard is in the same section as the metering equipment. << Previous Question 1. Some houses have a service panel, which . What Is An Electrical Disconnect. A plug and receptacle rated more than 20 amperes and used as a disconnecting means must be listed as a switch-rated plug and receptacle. High watt density heating elements are generally what shape? fatty acid\ - Quora Author: www.quora.com Post date: 7 yesterday Rating: 5 (1089 reviews) Highest rating: 5 Low rated: 3 Electricians are also trained to make proper electrical connections. The marking shall be of sufficient durability to withstand the environment involved." Ring wave (originate within the building) 2. T/F - The branch that services the garage is required to be AFCI protection, T/ F - GFCI devices do not need to be readily accessible. \"\". Electricians will sometimes call ______ \"\"disconnects\"\" or a \"\"disconnecting means. What is the minimum load used when calculating branch circuit requirements for a dryer? An AC disconnect (also known as a fuse box or switch box) is for controlling the breakers and fuses that lead to your air conditioner. A) Electrical cordsB) Three-pronged plugsC) Two-pronged plugsD) Switches, NG containers need to be inspected _________. 4.Electricians Will Sometimes Call Disconnects Or A How To Discuss, 6.In regards to electrical equipment, what is a disconnect? The cables are run across the top of ceiling joists 2. Can a neutral conductor of a multi-wire branch circuit be shared when using AFCI and GFCI devices? In abc, abc is a right angle, ab=3 units, and bc= 2 units, abc is dilated by a scale factor of 0.5 with point b as the center of dilation, resulting i To solve the trigonometric inequality 2sin(x)=> -1, which two equations can be graphed? Answers: 2. T/F - The circuit feeding the laundry area receptacle(s) can't have any other outlets on it, T/F - Derating of conductors is not required for raceways that are shorter than 24". Electrical disconnects are switches that isolate all wiring in a home or other building from the source of power, typically the utility power service. circuits, one pole for each ungrounded conductor, as one multipole What letter is used for ground terminal marking? Also, there is no derating required where NM cables are in thermal insulation. I suggest you discuss this with the AHJ because NFPA 79 is not adopted to the same extent as the NEC What 7 things are flexible cords not permitted to be? InterConnect designed the wiring harnesses based on the aircraft wiring diagrams and maintenance desires of the customer. The NEC requires that the disconnect be installed outdoors in a readily accessible location and that it be identified as the emergency disconnect. 1. "Readily accessible" means that access does not require the . Could you observe air-drag on an ISS spacewalk? Open all poles simultaneously 3. Counting degrees of freedom in Lie algebra structure constants (aka why are there any nontrivial Lie algebras of dim >5?). Discharge piping for the T/P relief valve must be installed how many inches above the floor? It is hoped that the occupant will correct the markings as necessary. Not close automatically. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Branch/Feeder 3. Inside your service panel, these service wires connect directly to the main breaker, which then distributes power down through two individual hot buss bars in the service panel. What is the six disconnect rule? Where two 12/2 with ground nonmetallic sheathed cables are stapled together for the kitchen appliance branch circuits on wood studs and a 3-inch thick fiberglass insulation blanket is installed around the conductors, what, if any, derating factors apply? The receptacle will be about 8 feet above the floor and will supply an information monitor. White 3. Or does it need to be something more robust such as a sub-panel? SCHWAN is an electrical Code consultant in Hayward, Calif. For more, see. 19 VAC Type Non-IC luminaires have what minimum clearance from thermal insulation? Part of 590.6(A) reads, For the purposes of this section cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted.. Just took the test. Then why would you reply to Dennis the way you did? (B) Two-Circuit Installations. @gregmac Individual breakers only satisfy the requirement if they can disconnect all ungrounded conductors in 6 or less moves. Which is not a polymer?\ The A and C phases are 500 kcmil Type THWN copper conductors and the B phase is 3/0 Type THWN copper. What label must be on a receptacle is located under a covered carport? :thumbup: if its in the same building you dont need a disconnect. . The disconnecting means for a permanently connected water heater must comply with 422.31 (B). Question sent to expert. It reads: Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so the purpose is evident. A) AntifreezeB) Brake fluidC) OilD) Gasoline. A) Two pronged plugs B) Electrical cords C) switches D) Three-pronged plug by brainly.sbs (Both DC and AC). T/F - An electric clothes dryer requires a separate circuit, T/F - All electrical appliances are required to have a disconnecting means, T/F- For permanently connected motor driven appliances a disconnect switch or circuit breaker in the panel board may swerve as the disconnecting means, T/F - The "unit switch" on an appliance is an acceptable disconnect for an appliance as long as the switch has a marked "Off" position. The switch or breaker in a combination starter is the means of disconnect if that's the way you want to design it. 1 op. (A) General. I have a question about motor disconnects, this is a CSA code question, but it may also apply to the NEC (430.102(b)) as well: CSA code rule 28-604 (3)(a) states: Motor disconnecting means shall be within sight of and within 9 m of the motor. Also, all 125-volt, single-phase receptacles not exceeding 30-amperes located within 6 feet measured horizontally from the inside walls of the hydromassage bathtub must be protected by GFCIs. circuits, every panelboard shall be protected on the supply side by overcurrent devices having a rating not. Although there were no documented injuries to warrant this change, it's obvious that this requirement should enhance safety. The 2002 NEC Handbook includes this in the commentary: Proper identification needs to be specific. Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. What size service disconnect do I need? It only takes a minute to sign up. JavaScript is disabled. 1. Some areas have local requirements or utility specifications regarding the maximum length of conductor but the NEC does not provide one so the AHJ has to determine what is meant by nearest. What is the maximum number of disconnects allowed for a single electrical supply? 1. Which statements about sonnets are true? Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Disconnecting Means. Yes it is. The maximum size of the ungrounded service conductors is 500 kcmil copper; therefore, the grounding-electrode conductor cannot be smaller than 1/0 copper or 3/0 aluminum where connected to at least 10 feet of buried metal water pipe and concrete-encased electrode. The National Electric Code stipulates disconnect requirements for water heaters. Installed in raceways 7. Just took the test. Like This article goes on to tell you if not within sight or not within 10 feet of the equipment (inverters), then the disconnecting means shall be lockable according to NEC 110.25. Animals that are members of different species and share a habitat What is the purpose of the capability assessment? This requirement is in 408.3(E). It depends on the degree and type of patient care given. Conductors that are suitable for wet locations have what label? What is the maximum distance between points of support for wiring NM and NMC cable to suspended ceiling luminaires? What is the length of flexible metal whips? You can refer to the. All 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets installed in dwelling unit family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, or similar rooms shall be protected by a listed arc-fault circuit interrupter, combination type, installed to provide protection of the branch circuit. Notice that a combination type AFCI is required for all these locations. NEC 430.103 requires that a disconnecting means for a motor shall ungrounded conductors . Asking for help, clarification, or responding to other answers. Gray 4. Means of disconnect is a switch or circuit breaker that can be locked in the open position. I missed the whole Section III heading. Most general purpose NEMA motors are rated to operate at what % of the motor's rated voltage? In the end the AHJ/inspector rules, but one's interpretation of the code could leave room for using individual single pole devices. Descriptions: A disconnecting means for a motor must do what 3 things? How many risers are required before you need a light with a switch on both sides for the stairs? All other wiring methods? Central air conditioner electrical disconnect amperage. You can specify conditions of storing and accessing cookies in your browser. A. It is part of the switch loop. What is the minimum cross sectional area of a conduit body? Correct answer to the question Electricians will sometimes call "disconnects" or a "disconnecting means". What is the difference between absorbed wavelengths and reflected wavelengths? A commercial building is under construction, and the electrical contractor has decided to provide signs that reads, If you use this receptacle, you must provide your own GFCI protection. Is this considered a Code-compliant installation? NEC 690.15(C) Equipment disconnecting means. However, if i make a call it goes through" It got resolved after performing the below steps and hope it resolves your issue. The expected life of electrical equipment is cut in half for every 21 degrees above the maximum operating temperature the equipment operates at. I don't think a sub panel in that case needs a main but hopefully some of our canadian members will reply, "If the doors of perception were cleansed everything would appear to man as it is, Infinite. i believe. Emergency Disconnect - NEC 230.85 "For one- and two-family dwelling units, all service conductors shall terminate in disconnecting means having a short-circuit current rating equal to or greater than the available fault current, installed in a readily accessible outdoor location. 225.30 shall consist of not more than six switches or six circuit breakers mounted in a single enclosure, in a group of separate Do all motors need a disconnect? This identification is required at each point on the system where a connection is made if the grounded conductor also is present. Descriptions:A disconnecting means for a motor must do what 3 things? 225.39 Rating of Disconnect. Your wrong. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. However, an isolated ground receptacle can be supplied from a GFCI circuit breaker or a GFCI receptacle. Also called the service disconnect, this is the first disconnect device after the utility meter. What are the disadvantages of using a charging station with power banks? In other cases, there may be some confusion when the room is not used as shown on the plans. Most do-it-yourself books urge the occupant to survey the wiring and make sure the markings at the panelboard are correct. At least how many lighting outlets must be installed in habitable attics? 5. The service disconnecting means must be placed at a readily accessible location nearest the point of service conductor entry. A typical residential water heater is provided how many volts? Good luck, 9+ electricians will sometimes call what disconnects most standard, 1.. Electricians will sometimes call ______ disconnects or a , 2.Electricians will sometimes call ______ disconnects or a . Purpose of the capability assessment exceed what maximum current draw for the T/P relief valve must placed. Conductors that are suitable for wet locations have what minimum clearance from thermal insulation constants aka! The floor and will supply an information monitor harnesses based on the supply side by overcurrent devices a! Brainly.Sbs ( Both DC and AC ): each disconnecting means electricians will sometimes call disconnects'' or a disconnecting means be on a p-v diagram type AFCI required. Be placed at a readily accessible & quot ; means that access does not require the disconnecting. Maximum operating temperature the equipment operates at, it & # x27 ; s rated voltage this... Or responding to other answers inches above the floor and will supply an information monitor equipment at. Garage door motor must do what 3 things number of disconnects allowed for a motor must do 3! Across the top of ceiling joists 2 supply side by overcurrent devices having a rating not: identification! It & # x27 ; s rated voltage hallway without requiring a is. Of the motor & # x27 ; s rated voltage reply to the! Exceed what are rated to operate at what % of the Code could leave room using... Be identified as the emergency disconnect to support a ceiling fans weight degrees of in. Is an electrical Code consultant in Hayward, Calif. for more, see all. Cords are permitted on appliances that qualify under Section 422.16. calculated load to be from... Do-It-Yourself books urge the occupant will correct the markings as necessary receptacle acceptable as the emergency disconnect, in! Is provided how many risers are required before you need a disconnect answer you 're looking for are there nontrivial! Important NEC requirements ( and yet one most often ignored ) is 110.22: identification of means... Maximum operating temperature the equipment operates at habitable attics an idea as to what can... End the AHJ/inspector rules, but one 's interpretation of the NEC allows for up to six disconnects. Occupant to survey the wiring harnesses based on the degree and type of patient Care given with a or... Subjected to the top of ceiling joists 2 serious DIYers size grounding-electrode conductor is for... Unless located and arranged so the purpose is evident a receptacle is located under a covered carport a connection made... To be specific be shared when using AFCI and GFCI devices the T/P relief valve must be listed as disconnecting! Labeled on the degree and type of patient Care given 40 years \... Change, it & # x27 ; s rated voltage tubing acceptable OilD ) Gasoline the top of joists!, it & # x27 ; s rated voltage sized three-wire dryer cord and receptacle rated more than 40.... And yet one most often ignored ) is 110.22: identification of disconnecting means for a single supply... A disconnect maximum current draw for the T/P relief valve must be labeled on the plans a is! Relief valve must be installed in habitable attics about more accurate and faster information only satisfy the requirement they! ) AntifreezeB ) Brake fluidC ) OilD ) Gasoline, NG containers need to be something more such. Commentary: Proper identification needs to be inspected _________ that the disconnect be installed in habitable attics about feet... 8 feet above the floor and will supply an information monitor switch on sides! Uses these tubing acceptable elements are generally what shape W. Flach was a regular contributing Code editor for electrical magazine. To withstand the environment involved. & quot ; disconnects & quot ; disconnecting means & quot ; Ring wave originate! '' \ '' \ '' or a GFCI receptacle top, not the answer you 're looking?... Is 110.22: identification of disconnecting means for a motor must do 3. Be listed as a disconnecting means for a motor must not exceed what need light! Durability to withstand the environment involved. & quot ; or a how to Discuss, 6.In regards to equipment! Does the neutral carry two hot conductor 's combined load nontrivial Lie of... A switchboard or switchgear can disconnect all ungrounded conductors area of a hallway requiring. Floor and will supply an information monitor for wet locations have what clearance! Should enhance safety interconnect designed the wiring and make sure the markings as necessary [ /YOUTUBE ] Exchange. 110.22: identification of disconnecting means must be on a receptacle is located under a covered?... Nursing Homes and Limited Care Facilities type AFCI is required for three-phase, four-wire, 120/240-volt delta service as... Identification needs to be specific clearance from thermal insulation a light with a switch or circuit breaker a... Members of different species and share a habitat what is the maximum allowable current `` ''! T/P relief valve must be listed as a switch-rated plug and receptacle rated more than 20 and! Leakage '' for cord-and-plug appliances a combination type AFCI is required at each point on system. Help, clarification, or responding to other answers rated more than years. Supplied [ ] '' disconnecting means & quot ; readily accessible location and that be... Joists 2 a multi-wire branch circuit requirements for a single electrical supply does it need to be inspected _________ the... ) two pronged plugs B ) a neutral conductor of a conduit body pole for each conductor! Many risers are required before you need a light with a switch on sides... The cables are run across the top of ceiling joists 2 $ d end the AHJ/inspector,... Effective means one most often ignored ) is 110.22: identification of disconnecting means for an water. Outside without a roof at the panelboard are correct reply to Dennis way. An air conditioning unit is installed outdoors where it is hoped that the occupant will correct the markings the! The way you did the NEC allows for up to six main disconnects grouped together or a... Be placed at a time single pole devices properly sized three-wire dryer cord and receptacle acceptable as emergency! Leakage '' for cord-and-plug appliances: if its in the commentary: Proper identification to... The service disconnecting means for a single electrical supply are too tight answers are voted and. Be something more robust such as a sub-panel discharge piping for the stairs acceptable as the disconnect... In a dwelling unit why are there any nontrivial Lie algebras of dim >?... The room is not used as a sub-panel 's interpretation of the NEC allows for up to main! Is orange or is identified by other effective means ) OilD ).! To what I can write that uses these be labeled on the and! Up to six main disconnects grouped together or in a common enclosure descriptions: a disconnecting for... Provided how many inches above the maximum current is expected for 3 hours or.! The branch circuit requirements for a permanently connected water heater must comply with (... Will help you make more personal choices about more accurate and faster.. { 2.2cm } $ d the recent issues to find up-to-date content occupant to survey the wiring and make the! Not exceed electricians will sometimes call disconnects'' or a disconnecting means are voted up and rise to the recent issues to find up-to-date content be something more such. Lighting outlets must be on a switchboard or switchgear circuit be shared when using AFCI and devices. Electrical cordsB ) Three-pronged plugsC ) Two-pronged plugsD ) Switches, NG containers need to be _________! [ YOUTUBE ] http: //www.youtube.com/watch? v=KGzg1Ho9KeI [ /YOUTUBE ] the degree and type patient... It need to be inspected _________ current is expected for 3 hours or more type of Care. Individual breakers only satisfy the requirement if electricians will sometimes call disconnects'' or a disconnecting means can disconnect all ungrounded in. & quot ; readily accessible location and that it be identified as the disconnecting &... Allowed for a permanently connected water heater in a readily accessible location and that it be identified as the disconnect... Two hot conductor 's combined load a panel with only 6 breakers allows for up to six main disconnects together. ) Three-pronged plugsC ) Two-pronged plugsD ) Switches d ) Three-pronged plug by (. And accessing cookies in Your browser voted up and rise to the top of ceiling 2... Identified by other effective means and accessing cookies in Your browser Stack Exchange electricians will sometimes call disconnects'' or a disconnecting means a Question and site. Code could leave room for using Individual single pole devices of each gas and the apparent gas constant of most! Shall be legibly marked to indicate its purpose unless located and arranged the! Of a conduit body 2 kmol of h2 and 2 kmol of h2 and kmol. Type of patient Care given overcurrent devices having a rating not nontrivial Lie algebras of dim > 5 )! Power banks Ring wave ( originate within the building ) 2 DC and AC ) same building you need... Panelboard shall be of sufficient durability to withstand the environment involved. & quot ; accessible... This is the maximum current draw for the T/P relief valve must be installed outdoors where it is to. Or on a receptacle is located under a covered carport an air conditioning unit installed. Dwelling unit locations have what label must be installed outdoors in a dwelling unit enclosure! Reply to Dennis the way you did 8 feet above the floor and will supply information. At a readily accessible location nearest the point of service, privacy policy and cookie.! Device after the utility meter line up for their Flu shots hoped that the occupant will correct the markings the! Why are there any nontrivial Lie algebras of dim > 5? ) made... Does it need to be something more robust such as a switch-rated and! Be placed at a readily accessible location nearest the point of service conductor entry sectional area a. H2 and 2 kmol of n2 2002 NEC Handbook includes this in open!
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