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as appropriate) tend to use as a guide when enacting local electrical codes. Quoting from authoritative codes & standards for each region we provide a table summarizing the current and prior wiring color code conventions used by electricians in building wiring. “Green-yellow” refers to green with yellow stripes. 1 – Wiring Color Codes. The image below details the standard labelling of live & neutral cabling in the UK & USA. brown - phase 1; orange - phase 2; yellow - phase 3; gray or with 2 white stripes; green with yellow stripe - ground; Sponsored Links . Standard 3 phase motors often have these locked rotor codes: less than 1 hp: Locked Rotor Code L, 9.0 - 9.99 kVA 1 1/2 to 2 hp: Locked Rotor Code L or M, 9.0 - 11.19 kVA The protective ground must be either green, green-yellow, or bare copper. Keep in mind that in case of three phase supply, there is no need for neutral wire here in Japan. The electrical wiring colour codes followed is slightly different in every part of the world depending on the standards they follow. I have seen industry-wide identification of fire alarm AC cable (externally identified “red”) but not branch circuits. Any other colors expected the above mentioned can be used for Live (Line or Hot) wires. Even there are different colour codes for AC and DC wires. Typical power wiring color codes. But opting out of some of these cookies may affect your browsing experience. Required fields are marked *, All about Electrical & Electronics Engineering & Technology. Ground - Ground wiring can be green or green with a yellow stripe. For the most part, a large amount of latitude is given by the National Electrical Code® (NEC®)1 with regard to colors. Related Post: A Complete Guide About Solar Panel Installation. The protective ground must be either green, green-yellow, or bare copper. These rules are applicable in the UK, EU and all other countries who follow the new IEC color codes instead of local and regional codes. You also have the option to opt-out of these cookies. Rule of six you say? Electrical engineers and electricians follow predefined wiring colour codes while wiring houses, commercial buildings and industrial panel boards. These codes apply on both AC and DC power circuits. However, certain colors h… NEC Color Code for the US in DC Power Electrical Wiring Similar to the AC power systems, the NEC also has suggested a mandatory color code for neutral conductor and protective earth or ground. The Code permits the use of marking tape on conductors at terminations, connections and splice points [see 210.5(C)(1)(a)]. Local regulations may however amend the N.E.C. Electrical engineers, contractors, traders, manufacturers and especially electricians around the world use different electrical wiring color codes for cable and wire installation and electricity distribution in industrial buildings or residential homes. Local regulations may however amend the N.E.C. Two other locations in the NEC specify color identification. Get the job done from any gadget and share docs by email or fax. Our website is made possible by displaying online advertisements to our visitors. Up tp 93% Off - Launching Official Electrical Technology Store - Shop Now! These cookies will be stored in your browser only with your consent. In Commercial and Industrial settings most IBEW Journeyman are trained and use Black, Red, and Blue for L1, L2, and L3 in 120/208v or 120/240v set ups. In some cases, the 1st and 2nd phase (lines) colors are in an inverse position as compared to NEC. Recommended Communities. NEC 2017 Code Changes Chapter 2 - Wiring and Protection ... Informational Note No. We also use third-party cookies that help us analyze and understand how you use this website. If you want to add your own country / region (or saw some weird) wiring color codes, let us know in the comment box below and we will be able to add them to this post. In addition, we will be showing the wiring color codes used by US, Canada, UK, EU, Australia, New Zealand, Russia, China, Japan, India, Pakistan and South Africa. Fig. In case of a three phase power supply, the combination of Red, Yellow and Blue are used for the active line power conductors, Black color for neutral conductor and Green or Green – Yellow for protective ground. “Green-yellow” refers to green with yellow stripes. In short, the fowling wiring color codes are practiced in Canada. Electrical wiring color code guide: This article describes the electrical wiring color code conventions for 120V or 240V AC circuit wiring in buildings in Canada, the U.S., the U.K. and the I.E.C. Both Aussies and Kiwis are using the same wiring color codes for single phase and three phase power circuits. What kind of marking does the Code require to identify the high-leg of a 3-phase, 4-wire delta connected system? (NEC) Electrical Color code: Currently, the (NEC) National Electrical Code in the United States does not contain a required color code for voltage marking on wire & cable. India and Pakistan including the other subcontinent countries as well as UAE (United Arab Emirate), KSA (Kingdome of Saudi Arabia) and South Africa AKA “Proteas” (They adapted the IEC now) follow the old UK wiring color codes i.e RYB (Red, Yellow and Blue for Three phase) and Red & Black for Phase and Neutral respectively. for French wiring - Answered by a verified Electrician We use cookies to give you the best possible experience on our website. The code requirements for this work are in Article 630. On a 4-wire, delta-connected, 3-phase system, where the midpoint of one phase winding of the secondary is grounded (a high-leg system), the conductor with 208V to ground must be durably and permanently marked by an outer finish orange in color or other effective means [110.15]. NEC mandates the colour codes for neutral and protective ground as grey and yellow-green respectively. 24-208(c) ... Marketing, and Sales Tools, Equipment and New Products Residential Electrical Forum NEC Code Forum. - search is the most efficient way to navigate the Engineering ToolBox! Wire Colors and Code Requirements Irrigation wires and cables are available in a multitude of sizes and colors. Thanks. In the United States, the National Electrical Code (NEC) mandates electrical wiring color codes for the neutral power conductor and protective ground. How to find the Proper Size of Circuit Breaker For Installation? The proper wiring color codes used in the installations is a best strategy for lines, neutral and ground wire tracing, time-saving, easy maintenance/troubleshooting and protection for those who are working on it. The colour code adopted in the US is as follows: The preferred colour codes shall be: Phase – 1: Black (for 120, 208, or 240 V), Brown (for 277, or 480 V). How to Calculate the Battery Charging Time & Battery Charging Current – Example, Automatic UPS / Inverter Wiring & Connection Diagram to the Home. In the United States, the National Electrical Code (NEC) mandates electrical wiring color codes for the protective ground. 6 EATON NEC 2020 Code changes. These are typically used for power wires in “branch circuits”. The single phase supply is 100V (Line to Neutral) and Three Phase supply is 200V (3 Lines, No Neutral). Phase Colour Codes in Electrical Supplies New colour coding from April 2006 The requirements for the colour coding of three phase and neutral conductors in electrical distribution systems was changed in April 2004 to harmonise the UK with the EC colour scheme, which dates back some 25 years. As things are little bit changed in Russia, so one must follow the tester before going in the mess. In case of neutral conductor, the color can be White or Grey and for protective earth, the color is Green, Green – Yellow or Bare conductor. The new edition of NFPA 70, the 2017 National Electrical Code (NEC), is one of the more significant updates in recent years. Wires larger than 6-AWG are always black. Standard Wire Colour Code / Electrical wiring color code "Note: this may be varied region to region" - Duration: ... 3 Phase Distribution Board - Duration: 17:43. The neutral conductor must be gray and the protective ground must be either green, green-yellow, or bare copper. We know this group is often advanced in understanding the code impacts and appreciate the feedback. Please consider supporting us by disabling your ad blocker. Necessary cookies are absolutely essential for the website to function properly. UK & USA standard electrical 3 phase wiring colours. Mostly 120V and 240V (there is a second hot or phase wire in 240V single phase AC system). And for the equipment you are building, your idea of using L1 L2 L3 labeling sounds good. NEC 220-2, use NEC 310-16 for ampacity. These articles state that the High-Leg on a 4-wire Delta system shall be marked by an outer finish of ORANGE or by another effective means. National Electrical Code is followed in the United States and sometimes in Canada. There are multiple colors used for different wires and cables in different regions for AC (alternating current) Single-Phase , Three-Phase and DC (Direct Current) for design and installation based on the local codes, rules and regulations. Some countries adapted the IEC wring codes with little bit modifications. Usually I make up temporary panel schedule on piece of notebook paper before I start pulling in new wires. Green + Yellow stripe : … On a 4-wire, delta-connected, 3-phase system, where the midpoint of one phase winding of the secondary is grounded (a high-leg system), the conductor with 208V to ground must be durably and permanently marked by an outer finish orange in color or other effective means [110.15]. Using color-coded cable assemblies helps the installer comply with 210.5(C)(1) because the conductors within are easily identifiable by color. For all other functions, there are no legal requirements. Only two colors are dictated by the NEC® for specific reasons: 1. Same as for AC, the mandatory colors for Grounded Neutral is White or Gray , The protective ground wire color should be  Green, bare conductor or Yellow/Green (yellow strip on green color). The local practice in the US follows and uses the Black color for Phase 1 (Hot 1) or Line 1 (L1) and Red for Phase 2 (Hot 2) or Line 1 (L2). For all other functions, there are no legal requirements. Your email address will not be published. Wiring Color Codes in United States of America (USA) American electrical contractors and electricians must comply with the National Electrical Code (NEC) for the color coding of wires. Now, Connect the electrical devices and appliances with the Earth link terminal which leads to earth electrode in the earthing and grounding system as shown in fig 1. The following IEC DC wiring color codes are used for Two-Wire Grounded, Two-Wire ungrounded and Three Wire grounded DC power systems. Graphic Products's guide to electrical wiring colors walks you through what each of the various colors means and what the different wire color coding standards are. Warning Voltage Drop NEC 310-16 wire ampacity tables do not take into account voltage drop, only thermal limit. black - phase 1; red - phase 2; blue - phase 3; white or with 3 white stripes - neutral; green - ground; 277/480 Volt. Under the National Electrical Code for the US there is no set color code. 04/27/2017 8:22 PM Apart from code requirements, there is at least a common de facto practice of brown-orange … The colour code adopted in the US is as follows: AS/NZS prohibits the usage of yellow, green, yellow-green, black and sky blue colours for phases. The following tables shows the comparisons of different wire and cable color codes used in DC power circuits used by IEC and NEC. How to Calculate/Find the Rating of Transformer in kVA (Single Phase and Three Phase)? UK & USA standard electrical 3 phase … These cookies do not store any personal information. For a single-phase supply – Red or brown is used for line and black or sky blue is used for neutral. NEC does not instruct any requirements for other conductors. So don’t panic with the “3rd Line” in three phases and the common Neutral as a White color. Please help settle a question of proper color coding of different 3phase voltages in motor control panels. The NEC is not any jurisdiction's electrical code per se; rather, it is an influential work of standards that local legislators (e.g., city council members, state legislators, etc. 25% Off on Electrical Engineering Shirts. As mentioned above, most of the Europe Union countries and UK, China, Russia, Hong Kong, Singapore, Ukraine, Belarus, Kazakhstan, Israel, Turkey, Argentina, South Africa, KSA (Saudi Arabia), UAE (United Arab Emirate) and Malaysia are following the IEC “International Electrotechnical Commission” wiring codes. Some of the power wires and cables color codes are mandatory while others are optional. Yes, its actually quite simple. Abbreviation: GY, BN, BK. These old wiring color codes are still used in the subcontinents including India, Pakistan, UAE and South Africa. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. There are some differences between AC and DC, so wire color codes for DC are a little bit different than that of AC wire color codes in both NEC and IEC. But don’t trust the cable insulation colors in these areas as electricians use old as well as new color codes for both AC and DC. In the United States, colour-coding of three-phase system conductors follows a de facto standard, wherein black, red, and blue are used for three-phase 120/208-volt systems, and brown, orange, and yellow are used in 277/480-volt systems. I have always been taught that 480v 3phase wiring, should be color coded as Brown, Orange, and Yellow. We would like to hear from you on what you see as the top 3 code changes that will impact you and your business. NEC mandates the colour codes for neutral and protective ground as grey and yellow-green respectively. This applies to not more than 3 phase conductors in 1 conduit. Our Site uses cookie. The NEC doesn't specify 3 phase color codes, just that you use a consistent code(and post it) in a building to identify different system voltages. How To Calculate Your Electricity Bill. Easy & Simple Explanation. UK Old* UK New* USA: Phase 1: Red: Brown: Black: Phase 2: Yellow: Black: Red: Phase 3: Blue: Grey: Blue: Neutral: Black: Blue: White or Grey *From 31 March 2006 all cabling installed in the UK was required to comply with the harmonised cable core colours and must not use the old colours. ARTICLE 300 - … How to Find the Rating (Current & Voltage) of a Switch, Plug, Outlet etc? The preferred wiring colour codes for a three phase four wire system is as follows: The preferred wiring colour codes for a single phase four wire system is as follows: For a 2-Wire Earthed Final Words: All you have learnt the wiring color codes for both DC and AC (1 & 3-Phase Circuits) in IEC & NEC and other regional relations. Since the inception of Ground-Fault Circuit-Interrupter (GFCI) protection into the NEC, it has continued expan-sion to additional branch circuits. Phase Colour Codes in Electrical Supplies New colour coding from April 2006 The requirements for the colour coding of three phase and neutral conductors in electrical distribution systems was changed in April 2004 to harmonise the UK with the EC colour scheme, which dates back some 25 years. -- David F. Boetcher . NEC (National Electrical Code) In the United States, the National Electrical Code (NEC) mandates electrical wiring color codes for the protective ground. Step by Step Procedure with Calculation & Diagrams. Additionally, the NEC does not contain color code requirement for ungrounded conductors , except 110.15 requires the high-leg conductor from a 120/240 4-wire delta-connected system to be identified with the color orange. Difference between single-phase and three-phase…, Top 3 causes behind a circuit breaker trip | MCB Trip, Top 5 differences between fuses and circuit breakers, NPN vs PNP Transistor | Difference between PNP and NPN, Transformer kVA calculator - Based on load. 1: A 3-phase, 4-wire, wye-connected power system used to supply ... on insulation of a color other than green, white, gray, or black and repeated at intervals not exceeding 610 mm (24 in.) It is common practice in most areas to identify 120/240 volt conductors as black and red for electrical services for the home, and black,red and blue for 3-phase 120/208Y electrical services. The colors adopted as local practice are shown in Table below.. Black, red, and blue are used for 208 VAC three-phase; brown, … Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Although the NEC doesn’t require a specific color code for ungrounded conductors, electricians often use the following color system for power and lighting conductor identification: 120/240V, single-phase — black, red, and white. Related Post: Electrical Wire & Cable Size Calculator (Copper & Aluminum), Related Post: Types of Electrical Wires and Cables. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Black, red, blue. Limited Edition... Book Now Here. Phase – 3: Blue (for 120, 208, or 240 V), Yellow (for 277, or 480 V). Power Wiring - Color Codes Color codes used in power wiring . Wire colors used for 208V multiphase powers circuits. 1) Shown below is the NEC code reference article and the exact verbiage: Article 200.4 Neutral Conductors "Neutral conductors shall not be used for more than one branch circuit, for more than one multiwire branch circuit, or for more than one set of ungrounded feeder conductors unless specifically permitted elsewhere in this Code". NEC does not instruct any requirements for other conductors. – Examples in British and SI System, Coulomb’s Laws of Magnetic Force – Formula & Solved Example. In this tutorial, we will discuss the different wiring color codes for AC (Single Phase & Three Phase), DC Power followed by NEC and IEC (Most countries (including Europe) adapted the IEC wiring color codes such as UK, China, Russia, Hong Kong, Singapore, Ukraine, Belarus, Kazakhstan, Turkey, Israel, South Africa, Argentina, Malaysia, KSA, UAE etc.) Neutral: White (for 120, 208, or 240 V), or Grey (for 277, or 480 V). Canada – CEC AC (Single & Three-Phase) Wiring Color Codes Canadian Electric Code “CEC” wiring color codes are similar in practice with National Electric Code “NEC” expect that White color is used for Neutral Wire and Green or bare conductor is used for protective ground. Take full advantage of a digital solution to generate, edit and sign documents in PDF or Word format on the web. 277V and 480V AC supplies are used for industrial and high power equipment such as motors and  heaters in factories and production units. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! … In the case of 230v 3phase, I would add an Orange tape marking to the Red leg to properly identify it as the stinger leg. It’s called the Rule of Six. This method of dividing a circuit number is sometimes easier than carrying around a electrical wiring color code chart. Related Topics . Related Post: How to Find the Rating (Current & Voltage) of a Switch, Plug, Outlet etc? Meanwhile, the following colors are adapted in the local practice and used for Lines, Neutral and Ground wires are as follows. 120/240 Volt. However, certain colors have been adopted as local practice and are recommended. Canadian Electric Code “CEC” wiring color codes are similar in practice with National Electric Code “NEC” expect that White color is used for Neutral Wire and Green or bare conductor is used for protective ground. Thread starter zappy; Start date Apr 3, 2017; zappy Senior Member ... except where specifically required to have a color by code, can be taped any size, and any color not reserved, as long as they start with a color that isn't reserved. So one must test with a tester to confirm the phase and neutral as well as positive and negative wires. The NEC does not contain color code requirement for ungrounded conductors, except 110.15 requires the high-leg conductor from a 120/240 4-wire delta-connected system to be identified with the color orange. The neutral conductor must be gray and the protective ground must be either green, green-yellow, or bare copper. In cases where there are no legal requirements, specific colors have been adopted as local practice and are recommended. Some of the well known are NEC “National Electrical Codes” followed by US and Canada while IEC “International Electrotechnical Commission” codes followed by UK, Most of the European Countries Argentina etc. How to Find the Proper Wire and Cable Size for Electrical Wiring Installation – IEC & NEC. John Ward 77,849 views. J. jaggedben Senior Member. Related Post: How to Find the Proper Wire and Cable Size for Electrical Wiring Installation – IEC & NEC. There’s no such thing as 480v Usa and canada are 600v. These colors are used for multi-phase 277 & 480V in Canada. Phase – 1: Black (for 120, 208, or 240 V), Brown (for 277, or 480 V). However, color-coding the outside of a wiring method is not an NEC requirement. The international standard, IEC 60446 (International Electro-technical Commission, an organization that prepares and publishes electrical and electronics technologies) defines the colour codes as below: IEC colour code for a three-phase AC system. Additionally, the NEC does not contain color code requirement for ungrounded conductors , except 110.15 requires the high-leg conductor from a 120/240 4-wire delta-connected system to be identified with the color orange. The NEC does not r… Otherwise, 6 and smaller single conductors need to come with a continuous factory finish where required to be identified a certain color by code. Australian Standard / New Zealand standard for wiring colour codes, India Standard- single-phase and three phase wire colour code, https://ztlabels.com/standards/dc-power-circuit-wiring-color-codes/, Earth or protective conductor: Green/Yellow. Some manufacturers use a step down transformer and use 460 volt fan motors and step down again to 24v for controls, Your email address will not be published. Step by Step Procedure with Calculation & Diagrams, How to Wire a Distribution Board with RCD, How to Wire Wire a Distribution Board [Single Phase], How to Connect a Portable Generator to Home Supply System (Three Methods), Different Types of Electrical Wiring Systems and Methods of Electrical Wiring Installation, Single Phase Electrical Wiring Installation in Home – NEC & IEC, Three Phase Electrical Wiring Installation in Home – NEC & IEC, Even More Electrical Wiring Installation Diagrams & Tutorials. Do It Yourselves 289K+ members. This is also known as two phase or split phase AC supply but mostly called single phase supply. The purpose of GFCI is for the protection of personnel from electrical shock. The IEC DC wiring color codes are adapted  from IEC AC wiring color codes. (of a Positive Grounded) DC Circuit system: The above-mentioned colour codes are followed in the European Union, United Kingdom, China, Hong Kong, Argentina, Russia, Ukraine, Belarus, Kazakhstan and Singapore. This category only includes cookies that ensures basic functionalities and security features of the website. For single-phase, Black (for 120V) or Red (for 277) is used for Line and Grey is used for Neutral. The NEC does not mandate that these rules be followed, they are the convention of tradition in the industry. On 230v 3 phase, the color code is Black, Blue, and Red. If we use cable marked externally with a color code, are we permitted to re-identify the conductors if needed to comply with 210.5(C)(1)? Electrical Wiring Color Codes for AC & DC – NEC & IEC, AC Single Phase & Three Phase And DC Wire & Cable Color Codes, IEC Wiring Color Codes for AC – UK , EU & Other Countries, India, Pakistan, UAE, KSA & South Africa Wiring Color Codes, NEC Wiring Color Codes for DC – US & Canada. For the most part, a large amount of latitude is given by the National Electrical Code® (NEC®)1 with regard to colors. 2016 All Star Training, Inc. 1 NEC 2017 Code Changes Chapter 3 - Wiring Methods and Materials Changes from the 2014 code are highlighted in yellow. We would like to hear from you on what you see as the top 3 code changes that will impact you and your business. Other Countries like China, Russia, KSA and UAE now follow the IEC Cable color codes for DC. Three phase power in Canada 600vac and 208vac is red black blue per Canadian Electrical Code. This is 110.15 and 230.56 which are essentially the same code. in a three phase system, they may use purple or gray color instead of gray in IEC. National Electrical Code Introduction The NEC is updated on a 3-year cycle and receives several Public Inputs and Public Comments for the consideration in the approval of a 2/3 majority by the code making panel of a change to the appropriate article. Cables color codes are mandatory while others are optional others are optional Download Technology... Please help settle a question of Proper color coding of different wire and Cable Size Calculator copper... Codes apply on both AC and DC power systems ground wiring can be.. A GFCI is for the 2005 National Electrical code is black, blue, and are! And SI system, Coulomb ’ s Laws of Magnetic Force – Formula & Solved.! The USA follows a standard colour code for 3 phase Panel Copyright 2020, Rights... The high-leg of a 3-phase, assume the white wire is neutral 277, or bare copper single-phase –. Article 630 including India, Pakistan, UAE and South Africa other conductors and red of circuit Breaker Installation! Creating quality content for you to learn and enjoy for free them into templates multiple... Panic with the “ 3rd Line ” in three phases and the common 3-phase colors of black,,. Related Post: Types of Electrical power conductors been updated for the website still used in uk. Ac Cable ( externally identified “ red ” ) but not branch circuits,... Is 100V ( Line or Hot ) wires experience on our website is made possible by online. Wire & Cable Size for Electrical wiring Installation – IEC & NEC different wire and Cable color codes for and! And Sales Tools, equipment and new Products Residential Electrical Forum NEC code Forum Electrical Technology Now. Some uncommon situations, one phase will have a higher Voltage than the others features of the world while... With yellow stripes of sizes and colors IEC DC wiring color codes are from... Tester to confirm the phase color code is black, red, blue, and Tools... For French wiring - Answered by a verified Electrician we use cookies to give you the possible. Before but they adapted the IEC Cable color codes of notebook paper before i start pulling new. Forum NEC code rules and DESIGN practice wire ampacity and Size 1 wires in “ branch circuits ” a color! And new Products Residential Electrical Forum NEC code Forum up tp 93 nec color code 3-phase Off - Launching Electrical... Electrician we use cookies to improve your experience while you navigate through the website follows Ground-Fault. The convention of tradition in the local practice and used for lines, no neutral ) follows... Also could include another color no need for neutral wire here in.... And red Sales Tools, equipment and new Products Residential Electrical Forum NEC code Forum while wiring houses commercial... In Japan keep creating quality content for you to learn and enjoy for free continuing... Of Rating of Transformer in kVA ( single phase AC supply but mostly called phase. That identifies every wire in an inverse position as compared to NEC heaters in factories and production units since. 240 V ), related Post: how to Find the Rating Current. Also have the option to opt-out of these cookies will be stored in your browser only with your consent grounded. Take into account Voltage Drop NEC 310-16 wire ampacity and Size 1 Russia, KSA and UAE Now the! Electrical Technology App Now – Formula & Solved Example from Electrical shock wires cables. Fillable fields to gather recipients follow... Orange Brown yellow is code for 400 3! Would like to hear from you on what you see as the top 3 changes. Typically used for Line and grey is used for Line and grey is used for grounded... Electrical wires and cables are available in a 3 phase, the National Electric code does have color requirements other... Code chart ( single phase AC supply but mostly called single phase and neutral as well as positive negative. Note after the three phase Electrical Distribution wiring Installation includes cookies that ensures BASIC functionalities security! Has not specified coloring of Electrical wires and cables color codes as China before but they the! Around a Electrical wiring Installation to give you the best possible experience on our is! Are agreeing to our Cookie policy so one must test with a yellow stripe ad revenue to keep creating content. The outside of a digital solution to generate, edit and sign documents in PDF or Word on... Hot ( phase ) Aussies and Kiwis are using the same as us NEC, nec color code 3-phase black... This category only includes cookies that help us analyze and understand how you use this website codes wiring. 120V ) or red ( for 277 ) is used for L1, L2 and!

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