{"id":781,"date":"2019-07-25T04:23:36","date_gmt":"2019-07-25T04:23:36","guid":{"rendered":"https:\/\/www.elstarled.com\/?p=781"},"modified":"2026-05-19T20:24:37","modified_gmt":"2026-05-19T12:24:37","slug":"how-to-connect-two-led-strips","status":"publish","type":"post","link":"https:\/\/www.elstarled.com\/fr\/raccordement-des-bandes-lumineuses-a-del\/","title":{"rendered":"How to Connect Two LED Strip Lights: Connector vs Soldering Guide"},"content":{"rendered":"

Joining two LED strip lights is simple only when the strips match. First, check the strip voltage, copper pads, polarity, width, pin layout, power load, and site conditions.<\/p>\n

For a short shelf, cabinet, sign, or display run, a matching solderless connector may be enough. However, a tight channel, a fixed joint, or a coated strip may need soldering or a project review.<\/p>\n

Because the joint is only one part of the system, this guide also covers power checks, controller limits, fault checks, and a short spec list for B2B projects.<\/p>\n

\n

How Do You Connect Two LED Strip Lights Together?<\/strong><\/h2>\n

Two compatible LED strip sections can usually be joined by cutting only at the marked copper pads, then using either a matching solderless connector or a soldered joint.<\/strong> Before you turn the power back on, check voltage, polarity, strip width, pin or channel layout, total load, and controller rating.<\/p>\n

Short workflow<\/h3>\n
    \n
  1. First, disconnect power<\/li>\n
  2. Next, confirm both strip sections use the same voltage and pad layout<\/li>\n
  3. Then, cut only at the marked cut line or copper pad area<\/li>\n
  4. After that, match +<\/code> \u00e0 +<\/code>, -<\/code> \u00e0 -<\/code>, and line up color or data channels<\/li>\n
  5. Finally, use a matching connector or solder the joint, then test before final mounting<\/li>\n<\/ol>\n<\/section>\n

    \"Diagram<\/h2>\n

    Before You Connect: Fit Checklist<\/strong><\/h2>\n

    Start with the fit check below. It keeps a small join from turning into a no-light, flicker, wrong-color, or dim-end problem.<\/p>\n

    Check these items before cutting<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n
    Check<\/th>\nWhat to confirm<\/th>\nWhy it matters<\/th>\n<\/tr>\n<\/thead>\n
    Tension<\/td>\nBoth strip sections use the same rated voltage<\/td>\nA wrong voltage can stop the strip or damage parts<\/td>\n<\/tr>\n
    Cut point<\/td>\nCut only at the marked line or copper pad area. For more detail, see Elstar\u2019s guide on d\u00e9coupe de bandes lumineuses LED<\/a><\/td>\nA random cut can break the circuit<\/td>\n<\/tr>\n
    Copper pads<\/td>\nPads are clean, flat, and not torn<\/td>\nPoor pad contact can cause flicker or no light<\/td>\n<\/tr>\n
    Polarity<\/td>\n+<\/code> matches +<\/code>et -<\/code> matches -<\/code><\/td>\nReverse polarity is a common cause of a dead second strip<\/td>\n<\/tr>\n
    Channels<\/td>\nRGB, RGBW, CCT, or data pads line up with the same labels<\/td>\nWrong channels can show the wrong color or stop control<\/td>\n<\/tr>\n
    Width and pins<\/td>\nThe connector fits the strip width and pin count<\/td>\nA loose or wrong connector may not clamp the pads<\/td>\n<\/tr>\n
    Coating or IP need<\/td>\nThe strip is bare, coated, sleeved, or sealed<\/td>\nAfter cutting, confirm the right seal method for the site<\/td>\n<\/tr>\n
    Power load<\/td>\nThe supply and controller can handle the added length<\/td>\nLow capacity can cause dim light, flicker, or trips<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \"Checklist<\/h3>\n

    Keep the wording on site labels<\/h3>\n

    Also, use the marks on the strip itself. Labels such as +<\/code>, -<\/code>, R, G, B, W, CCT, DI, DO, or GND are more useful than wire color alone.<\/p>\n

    Choose the Right Connection Method<\/strong><\/h2>\n

    Next, pick the method that fits the job. A connector is fast, while soldering gives a smaller joint when a connector is too large.<\/p>\n

    Connector vs soldering table<\/h3>\n\n\n\n\n\n\n\n\n
    M\u00e9thode<\/th>\nBest for<\/th>\nWatch out for<\/th>\nUse when<\/th>\n<\/tr>\n<\/thead>\n
    Solderless strip-to-strip connector<\/td>\nSimple straight joins and short runs<\/td>\nThe connector must match width, pins, and pad layout<\/td>\nYou need a fast no-solder join<\/td>\n<\/tr>\n
    Solderless strip-to-wire connector<\/td>\nCorners, gaps, shelves, signs, and display turns<\/td>\nWire length and polarity still matter<\/td>\nYou need to bridge a non-lit gap<\/td>\n<\/tr>\n
    Soldered joint<\/td>\nSmall, fixed, or tight-channel joins<\/td>\nBad solder work can damage pads or bridge channels<\/td>\nA connector is too bulky or not suited to the strip<\/td>\n<\/tr>\n
    Project review<\/td>\nLong runs, wet sites, high load, pixel strips, or unknown specs<\/td>\nThe joint may not be the main limit<\/td>\nPower, control, or layout is unclear<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    When the method should change<\/h3>\n

    However, do not choose by speed alone. If the joint sits inside an aluminum profile, near a damp area, or on a service route, the join may need more support than a basic clip can give.<\/p>\n

    Choose the Right LED Strip Connector<\/strong><\/h2>\n

    Before you buy a connector, match it to the strip type and the job. Elstar\u2019s LED strip connector category<\/a> lists strip-to-strip, strip-to-wire, corner, and multi-pin connector options. In addition, the LED strip lights category<\/a> can help you check the strip family before you choose a connector.<\/p>\n

    Match the connector to the strip type<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
    Strip or layout type<\/th>\nConnector check<\/th>\nCommon use<\/th>\nImportant warning<\/th>\n<\/tr>\n<\/thead>\n
    Single-color strip<\/td>\nCheck 2 pads, width, and polarity<\/td>\nStraight strip-to-strip or strip-to-wire joins<\/td>\nDo not assume every 2-pin strip has the same width<\/td>\n<\/tr>\n
    CCT strip<\/td>\nCheck warm and cool channel labels<\/td>\nTunable white strips with a CCT controller<\/td>\nCrossed channels can affect color control<\/td>\n<\/tr>\n
    RGB or RGBW strip<\/a><\/td>\nCheck RGB\/RGBW labels, common pad, pins, and width<\/td>\nColor strip projects with a controller<\/td>\nAn RGB connector may not support an extra white channel<\/td>\n<\/tr>\n
    COB strip<\/a><\/td>\nCheck pad layout, width, and coating<\/td>\nDot-free light lines and tight channels<\/td>\nSome COB strips need a matched connector or soldering<\/td>\n<\/tr>\n
    Addressable strip<\/a><\/td>\nCheck voltage, ground, data line, and arrow direction<\/td>\nPixel effects and programmed light runs<\/td>\nPower pads alone are not enough; data direction matters<\/td>\n<\/tr>\n
    Water-resistant or coated strip<\/td>\nCheck coating removal and seal plan<\/td>\nDamp, dusty, or outdoor-style sites<\/td>\nDo not assume the first IP rating remains after cutting<\/td>\n<\/tr>\n
    Corner or gap run<\/td>\nCheck strip-to-wire connector type and wire route<\/td>\nCabinets, shelves, signs, and non-lit gaps<\/td>\nWire length still adds distance and contact points<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \"Connector<\/h3>\n

    Use product pages as a starting point<\/h3>\n

    Also, treat product pages as a start, not as final proof of fit. If the strip model, width, coating, or pin layout is unclear, ask for a spec check before ordering connectors in volume.<\/p>\n

    Method 1: Connect Two LED Strips With a Solderless Connector<\/strong><\/h2>\n

    A solderless connector is the easiest path when the strip and connector match. Still, the strip should be off while you cut, insert, or adjust it.<\/p>\n

    Step 1: Disconnect power<\/h3>\n

    First, turn off and unplug the power supply. Do not cut the strip or place it in a connector while it is powered.<\/p>\n

    Step 2: Find the marked cut point<\/h3>\n

    Next, look for the scissor mark, cut line, or copper pads. Cut straight across that mark.<\/p>\n

    Step 3: Prepare the strip ends<\/h3>\n

    Then, make sure the copper pads are clean and flat. If the strip has a coating, follow the product method for exposing the pads.<\/p>\n

    Step 4: Choose the matching connector<\/h3>\n

    After that, pick a connector by width, pin count, strip type, coating, and layout. A connector for an 8 mm single-color strip may not fit a 10 mm RGB strip.<\/p>\n

    Step 5: Insert and align the strips<\/h3>\n

    Open the connector and slide each strip end in until the pads sit under the contacts. Then, match polarity and channel labels before closing the clasp.<\/p>\n

    Step 6: Test before mounting<\/h3>\n

    Finally, power the strip for a short test. Check light, color, dimming, and control before you peel the backing or place the strip in a hard-to-reach spot.<\/p>\n

    Method 2: Connect Two LED Strips by Soldering<\/strong><\/h2>\n

    Soldering can help when the joint must be small or fixed. However, it is not the best choice for every user because it needs tools, clean pads, and steady work.<\/p>\n

    Step 1: Set up the work area<\/h3>\n

    First, unplug the strip and power supply. Use a clean, dry surface, good light, and safe tool handling.<\/p>\n

    Step 2: Cut and expose the pads<\/h3>\n

    Next, cut at the marked pad area. Then, expose the pads without scraping away the copper.<\/p>\n

    Step 3: Match the pads<\/h3>\n

    Before soldering, line up +<\/code>, -<\/code>, RGB, RGBW, CCT, data, and ground pads as marked on the strip.<\/p>\n

    Step 4: Solder pads or short wires<\/h3>\n

    Then, solder pad-to-pad or use short wires between the two strip sections. For corners, short wires often work better than forcing the strip to bend.<\/p>\n

    Step 5: Insulate and test<\/h3>\n

    After the joint cools, cover exposed metal with a suitable sleeve or insulation. Finally, test the strip before final install.<\/p>\n

    Power and Layout Check After Joining Two Strips<\/strong><\/h2>\n

    After the strips are joined, check whether the power supply and controller can run the added length. A clean joint cannot fix an under-sized supply or a long run with too much drop.<\/p>\n

    Calculate total load<\/h3>\n

    Use the strip label or data sheet for watts per meter. Then, multiply the length by watts per meter and add each strip section.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
    Item<\/th>\nExample<\/th>\nHow to use it<\/th>\n<\/tr>\n<\/thead>\n
    Strip A length<\/td>\n3 m<\/td>\nUse the real length after cutting<\/td>\n<\/tr>\n
    Strip B length<\/td>\n2 m<\/td>\nAdd the second strip length<\/td>\n<\/tr>\n
    Strip power<\/td>\n8 W\/m<\/td>\nUse the label, reel, data sheet, or supplier value<\/td>\n<\/tr>\n
    Total length<\/td>\n5 m<\/td>\n3 m + 2 m<\/td>\n<\/tr>\n
    Strip load<\/td>\n40 W<\/td>\n5 m \u00d7 8 W\/m<\/td>\n<\/tr>\n
    Power supply check<\/td>\nSame voltage + usable capacity above load<\/td>\nUse a project margin instead of running at the limit<\/td>\n<\/tr>\n
    Controller check<\/td>\nSupports the strip type and load<\/td>\nCheck this for dimming, CCT, RGB, RGBW, and pixel strips<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Formula:<\/strong><\/p>\n

    Strip watts = strip length \u00d7 watts per meter\r\nTotal load = strip\/run 1 watts + strip\/run 2 watts + other connected runs<\/code><\/pre>\n
    Use the right power and control path<\/h3>\n
    For deeper power planning, use Elstar\u2019s guide on connecting multiple LED strips to one power source<\/a>. You can also review Elstar\u2019s LED power supply category<\/a> et LED strip controller and amplifier category<\/a> when the project needs a new supply or control unit.<\/p>\n
    For an outside reference, TME gives a simple LED power-supply calculation guide<\/a> based on strip length and watts per meter. In addition, MEAN WELL\u2019s LED driver FAQ<\/a> is a useful reminder to check the driver data sheet and working limits for the exact model.<\/p>\n
    \"Formula<\/h2>\n
    When Not to Connect Strips End-to-End<\/strong><\/h2>\n
    Sometimes, a simple end-to-end join is the wrong plan. In that case, use a power layout review before you install the strip.<\/p>\n
    Use a different plan when these signs appear<\/h3>\n