Whether you're a contractor or building manager, it is important to keep Class 2 compliance in mind when retrofitting or creating new construction with low voltage LED lights and systems. The National Electric Code (NEC) requires that low voltage power supplies and electrical wiring be Class 2 compliant. The code was created to prevent electrical fires and shock.
Kev tshuaj xyuas: Leej twg xav tau lawv thiab lawv ua haujlwm li cas
If you are creating new construction or adding major modifications, you will most likely require an inspection. New construction requires a work permit that must be obtained from a local safety or electrical inspector. Some small jobs may not require a permit but it is in your best interest to get a safety inspection to avoid any unintended problems. For example, if you re-wire a kitchen or basement without having it inspected and then try to sell the house, an inspector may ask you to tear the walls down to check the wiring. Also, if faulty wiring that wasn't inspected starts an electrical fire, your insurance company might challenge the claim.
To begin the permit process, you'll need to present a detailed wiring diagram of your project to your local inspector. Once a work permit is granted, the inspection consists of two visits: the 'rough-in' inspection and the 'final' inspection. The rough-in inspection consists of checking that all wiring is properly installed before any switches, fixtures, insulation and walls are added. For low-voltage installations, this is when the inspector will specifically check to see if the wiring is Class 2 compliant. Basically, the skeleton of the installation will be reviewed to see if the correct gauge wire is installed and harnessed correctly, as well as other measures.
Thaum qhov kev ntsuam xyuas dhau lawm, koj tuaj yeem ua kom tiav qhov kev teeb tsa nrog rwb thaiv tsev, phab ntsa, keyboards thiab fixtures ua ntej qhov kev tshuaj ntsuam zaum kawg. Thaum kuaj xyuas qhov hluav taws xob tsis tshua muaj hluav taws xob LED teeb thiab cov tshuab, tus neeg kuaj xyuas yuav kuaj xyuas seb cov khoom siv hluav taws xob puas siv tau thiab ua raws li Chav Kawm 2. Lawv kuj tseem yuav kuaj xyuas seb cov khoom siv puas tau pom zoo los ntawm National Recognized Testing Laboratory (NRTL), xws li Underwriter Laboratories (UL) lossis Intertek (ETL).
Thaum tus kws tshuaj ntsuam xyuas pom zoo tias qhov project ua tau raws li cov qauv kev tshaj lij, koj tuaj yeem pib siv koj cov circuits tshiab kom muaj kev nyab xeeb thiab muaj kev ntseeg siab hauv kev ua raws. Xav paub tias koj tuaj yeem ua dab tsi kom paub tseeb tias koj qhov project tau txais kev pom zoo? Tom ntej no, peb khiav los ntawm tag nrho cov teeb pom kev zoo project Cheebtsam.
Chav Kawm 2 Ua Raws Li Daim Ntawv Teev Npe
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Power supplies convert the 120V power into low voltage 12V or 24V power. For power supplies to be Class 2 compliant, 12V DC drivers must be 60W and under and 24V drivers must be 96W and under. Power supplies that comply with the Class 2 regulation are always marked or labeled as so.
Also for NEC compliance, Class 1 circuits (up to 600V) and Class 2 circuits must be separated. To pass inspection, a junction box must be installed to encapsulate a 120V AC wire connection to a 12-24V DC power converter (driver). Junction boxes provide a safe, grounded fireproof enclosure, preventing wire nuts from coming loose and causing a short and possible electrical fire. This Lo-Pro Junction Box is one example of how to separate high and low voltage wiring within the same enclosure.
For large projects such as kitchen remodels, office upgrades or new commercial spaces, a large amount of power is often required. In this case, you have two options: You can install several 60W drivers, or you can install a high wattage multi-tap driver such as the 12V 300 Watt Class 2 Tsav. This driver contains 5 separate 60W outputs, and each of the outputs has its own circuit breaker so in the case that one of them experiences a surge, the others will not be affected. It's like having several drivers and junction box in one unit, and is a more affordable and easier to install solution than using several separate 60W drivers. Only one switch will control all outputs, so you do not need multiple switches unless you need a section of lighting with an individual control such as a dimmer.
Kev xaim
Cov hlua hluav taws xob feem ntau yog coated hauv cov roj hmab-raws li rwb thaiv tsev kom tiv thaiv corrosion thiab luv luv-circuit. Qhov no muaj kev nyab xeeb txaus rau kev teeb tsa sab hauv tsev siv cov qhov hluav taws xob ntawm phab ntsa, piv txwv li, kom muaj lub teeb ci hauv koj chav nyob lossis lub console video game. Tab sis rau ib qho nyuaj mus tas li -wire installation, yuav tsum tau ceev faj ntxiv kom ua raws li Class 2.
Most wire you see at the hardware store isn't rated for permanent installation and cannot be installed inside walls, under floorboards, or as a structural component of a building. For example, for an installation where you would want to hide wires behind a wall, the wires could be surrounded by insulation, creating a warmer environment. The wires could crack or melt, leading to sparks or fires. Class 2 In-Wall Rated Wire provides an extra layer of installation that is more resistant to cracking or melting, and is approved by the NEC to be installed inside walls.
Teeb pom kev zoo
As we mentioned earlier, all low-voltage lighting fixtures must be certified by an NRTL to pass inspection. To verify that a product is UL or ETL listed, check the product details in the lighting company's catalog or website. If you can't locate the information you need, you may want to contact the manufacturer directly. For extra precaution, you can look up the number listed on the official websites for UL and ETL to make sure the certification is authentic. The best way to search the UL Online Certifications Directory is to use the E-file number. For the ETL Phau Ntawv Qhia, tshawb nrhiav siv lub tuam txhab npe lossis cov khoom lag luam thiab lub npe.
Ntxiv Resources
Want to dig deeper? The National Fire Protection Association (NFPA) provides more detailed information about Class 2 compliance, who it impacts and why it is important. You can buy the latest NEC handbook through the NFPA website or even on Amazon. You may also contact your local inspector on how to best prepare your project for inspection.
Npaj los soj ntsuam
Tam sim no koj paub yuav ua li cas npaj koj qhov qis -voltage installation kom cov teeb ci LED, cov khoom siv hluav taws xob, kev sib txuas thiab cov xaim hluav taws xob yog raws li Chav Kawm 2, koj npaj txhij rau kev tshuaj xyuas. Koj tuaj yeem tso siab tau tias qhov kev tshuaj xyuas yuav mus zoo thiab qhov kev teeb tsa yuav nyob twj ywm thiab nyab xeeb rau xyoo tom ntej.
