{"id":3703,"date":"2026-11-09T17:15:23","date_gmt":"2026-11-09T09:15:23","guid":{"rendered":"http:\/\/www.ecuatoys.com\/blog\/?p=3703"},"modified":"2026-11-09T17:15:23","modified_gmt":"2026-11-09T09:15:23","slug":"do-installation-terminal-blocks-come-in-custom-lengths-4f77-b55307","status":"publish","type":"post","link":"http:\/\/www.ecuatoys.com\/blog\/2026\/11\/09\/do-installation-terminal-blocks-come-in-custom-lengths-4f77-b55307\/","title":{"rendered":"Do installation terminal blocks come in custom lengths?"},"content":{"rendered":"

Hey everyone, if you\u2019ve ever shopped for installation terminal blocks for a project\u2014whether it\u2019s wiring up a tiny home office setup or a full industrial control panel\u2014chances are you\u2019ve stared at a shelf of standard-length blocks and thought, \u201cThis just isn\u2019t gonna fit what I need.\u201d I\u2019m part of a terminal block supply company, and let me tell you, this is one of the most common questions we get from electricians, engineers, and even weekend DIYers: Do installation terminal blocks come in custom lengths? Installation Terminal Block<\/a><\/p>\n

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Let\u2019s cut right to the chase\u2014short answer is: Yeah, they do. But it\u2019s not as simple as picking a random number and hitting order. Most people first think of the off-the-shelf (OTS) blocks you grab at the local hardware store or big-box industrial supply: 10-position, 20-position, whatever is already assembled in a neat row on a carrier. Those are perfect if your wire count lines up exactly with those pre-made lengths, but let\u2019s be real\u2014projects rarely work that neatly. I remember a guy hit us up last month, panicked, because he had to wire a small control module for a brewery\u2019s pump system, and his cabinet had a weird 17-wire gap between two sensors. All the standard blocks were 10 or 20 positions, so he\u2019d have extra space to fill with unused blocks, which isn\u2019t just messy\u2014it\u2019s a fire risk if loose wires or debris get in the gaps. That\u2019s exactly where custom length terminal blocks save the day.<\/p>\n

First, let\u2019s clarify what we mean by \u201cinstallation terminal blocks\u201d here\u2014these are the ones used for connecting, insulating, and securing electrical wires in permanent setups: control panels, building wiring, machine tools, that kind of thing. They\u2019re different from the small, disposable ones you use for temporary test wires. So when we talk custom lengths for these, we\u2019re talking adjusting how many individual positions (each one holds one wire) are in a single block assembly, not like cutting a solid plastic bar down. Most custom terminal blocks are made on a modular system anyway\u2014each position is a separate unit that clips together, right? So if you need 7 positions instead of a pre-made 10, you just skip 3, and that\u2019s your custom length.<\/p>\n

But wait, why would you even need a custom length vs. mixing and matching standard ones? Let\u2019s break down the use cases that make custom blocks non-negotiable. For industrial projects, like that brewery cabinet I mentioned earlier, space is at a premium. Control panels often have tight, measured cutouts for components\u2014if your terminal run is just an inch shorter than a standard 20-position block, adding an extra block to make up the length might force the entire panel to shift, which throws off nearby switches or PLCs (programmable logic controllers). That\u2019s hours of rework, no one wants that. Then there\u2019s renovation work: old commercial buildings that had weird wiring runs back in the 80s, when standard wire counts weren\u2019t consistent. Electricians have to fit terminal blocks into spaces that were never designed for them, so a custom length that fits exactly avoids messy wiring hacks like cramming extra blocks or leaving empty positions. Even hobbyists building custom gear\u2014like a small solar setup for a camper\u2014might need a custom run to fit their battery compartment, not waste space on unused terminal positions.<\/p>\n

Now, don\u2019t get it twisted\u2014custom lengths aren\u2019t for every job. If you\u2019re wiring a basic home circuit that needs 12 wires, a 12-position standard block is cheap and easy to get, no need to go custom. The tradeoff with custom is that it\u2019s not OTS, so it takes a little longer (usually 3 to 7 business days for standard custom runs, depending on volume) and there\u2019s a minimum order sometimes, but it\u2019s way better than dealing with the headache of ill-fitting blocks. I should also mention that not all terminal block suppliers offer custom lengths\u2014some only stick to pre-made positions because it\u2019s cheaper for them to mass produce, but that\u2019s where we come in. We\u2019ve been doing custom runs for years, so we know the ins and outs of making sure each custom block fits right, is insulated properly, and has the same reliability as our standard lines.<\/p>\n

Wait, let\u2019s address a common misconception: some folks think custom length terminal blocks are flimsy or lower quality because they\u2019re not mass-produced. Nah, that\u2019s not how it works. The modular design means each position is made from the same durable nylon or polycarbonate material as standard blocks, and the clip mechanism is identical\u2014you won\u2019t get a loose wire or a block that falls apart because it\u2019s custom. The only difference is how many positions you put together, which is tailored to your exact needs. We do add a little QC check for every custom run to make sure the count is right, the gaps between positions are even, and that the screw terminals hold wires securely, so you never have to worry about a custom block failing because it was made to order.<\/p>\n

Another thing to consider when going custom: do you need additional features with your length? Like, if you need a fuse holder integrated into one position, or a ground terminal at the start\/end of the run, custom length lets us build that in without extra work. Someone reached out last year who was wiring a medical device (super strict on safety, by the way) and needed a 21-position block with a ground terminal on each end\u2014standard blocks only had ground positions every 5, so a custom length let us add those extra grounds exactly where they needed to be, no cutting corners. That\u2019s the big perk of custom: it\u2019s not just adjusting length, it\u2019s adjusting the whole setup to your project\u2019s needs.<\/p>\n

So how do you go about getting custom length terminal blocks? It\u2019s simpler than you think. You don\u2019t need a 10-page engineering drawing (unless you want one, obviously). Most of the time, you just tell us how many positions you need, any specific features you want (ground terminals, fuse positions, color coding, etc.), and the wire gauge you\u2019re using. We can even help you adjust the length if you\u2019re not 100% sure on the exact count\u2014just tell us the space you have available, and we\u2019ll size it right. We also work with small orders, so if you\u2019re a DIYer with a tiny camper project, you don\u2019t have to buy 100 custom blocks to get a 10-position one made. That\u2019s a mistake a lot of people make\u2014they think custom is only for big industrial orders, but it\u2019s for every project.<\/p>\n

Let me share a funny (well, funny now, not at the time) story from a few months back. A local electrician came in a panic on a Tuesday\u2014he was finishing up a remodel on a small restaurant\u2019s kitchen, and the terminal run for the exhaust fan\u2019s wiring was exactly 19 positions, but all the standard 20-position blocks he\u2019d brought were slightly too long. The kitchen\u2019s wall for the wiring chase was cut to fit the 19-position length, so a 20-position would stick out and be a tripping hazard, plus it violated the restaurant\u2019s electrical code (no exposed wiring in kitchen areas). We had a 19-position custom block ready in 2 days, and he got back to finish the job on time\u2014saved him from a costly delay with the health inspector. That\u2019s the kind of problem custom terminal blocks solve every single day.<\/p>\n

Now, let\u2019s get real\u2014there are a couple of small caveats to keep in mind when ordering custom length. First, lead times: like I said, usually 3-7 days for standard runs, but if it\u2019s a super specialized feature (like a custom color for the block to match your panel), it might be a week or two. Second, minimums: most suppliers, including us, have a small minimum, like 10 blocks, but that\u2019s because custom production isn\u2019t free\u2014we have to set up the tooling for that specific count. But if you only need a few, some suppliers will work with you, just make sure to ask before you order. Third, compatibility: if you\u2019re using terminal blocks with existing panels or wiring, make sure you know the wire gauge and screw type you need\u2014custom length is useless if the block doesn\u2019t fit your wires.<\/p>\n

Wait, another question people ask: can you mix terminal block types for a custom run? Like, if you need some positions for 14-gauge wire and some for 12-gauge, can you make a custom length that has both? Yep, that\u2019s totally doable. The modular system lets you swap out position sizes, so you can build a custom block that has exactly what you need, no more, no less. That\u2019s a game-changer for projects that have multiple wire sizes in the same terminal run, which is super common in industrial and commercial wiring.<\/p>\n

At the end of the day, custom length installation terminal blocks aren\u2019t a luxury\u2014they\u2019re a solution for when standard blocks just don\u2019t fit your project. We get why people ask, \u201cDo I really need custom?\u201d and the answer is: if standard blocks leave you with too many empty positions, take up too much space, or don\u2019t fit your exact wire count, then yes, you do. No one wants to deal with messy, jumbled wiring in a control panel or a home setup, and custom blocks are the easiest way to get a clean, secure, code-compliant setup.<\/p>\n

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If you\u2019re working on a project right now where the standard blocks aren\u2019t cutting it\u2014whether it\u2019s a small camper build, an industrial control panel, or a commercial remodel\u2014hit us up to chat about custom terminal lengths. We can walk you through the process, answer any questions, and make sure you get exactly what you need, no extra hassle. Don\u2019t waste time forcing a square peg into a round hole with pre-made blocks\u2014custom is the way to go for a smooth, stress-free project finish.<\/p>\n

Rear Nut Connector<\/a> References:<\/p>\n

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  1. Industrial Terminal Block Design Standards, National Electrical Manufacturers Association (NEMA), 2022<\/li>\n
  2. Modular Terminal Block Applications Guide, International Electrotechnical Commission (IEC), 2021<\/li>\n
  3. Installation Best Practices for Terminal Blocks, National Fire Protection Association (NFPA), 2023<\/li>\n<\/ol>\n
    \n

    Wonke Electric Co., Ltd.<\/a>
    Wonke Electric Co., Ltd. is one of the most professional installation terminal block manufacturers and suppliers in China. We’re offering high quality products with good price, please rest assured to wholesale bulk cheap installation terminal block made in China here and get free sample from our factory.
    Address: No. 463, Guang’an Road, Dongmeng Industrial Zone, Wuniu, Yongjia County, Wenzhou City, Zhejiang Province, China 325103
    E-mail: info@wonkedq.com
    WebSite:     https:\/\/www.wonkecontact.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Hey everyone, if you\u2019ve ever shopped for installation terminal blocks for a project\u2014whether it\u2019s wiring up … Do installation terminal blocks come in custom lengths?<\/span>Read more<\/a><\/p>\n","protected":false},"author":60,"featured_media":3703,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3666],"class_list":["post-3703","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-installation-terminal-block-4548-b58d11"],"_links":{"self":[{"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/posts\/3703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/users\/60"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/comments?post=3703"}],"version-history":[{"count":0,"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/posts\/3703\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/posts\/3703"}],"wp:attachment":[{"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/media?parent=3703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/categories?post=3703"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ecuatoys.com\/blog\/wp-json\/wp\/v2\/tags?post=3703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}