LYM3 Residential Distribution Box
The LYM3 residential distribution box is manufactured by LYE Technology with a fire-retardant ABS panel and frosted PC flip-top window, and offers four enclosure thickness grades: 0.7 mm, 0.8 mm, 1.0 mm and 1.2 mm. Compact 4-way to 40-way two-row layouts serve apartments, villas and office fit-outs.
- Panel: ABS flame-retardant panel with frosted PC flip-top window
- Way range: 4 ways up to 40 ways
- Enclosure thickness: 0.7 mm / 0.8 mm / 1.0 mm / 1.2 mm
- Mounting: Recessed and surface mounted (M series)
- Smallest model: LYM3-4: 141 x 160 x 90 mm overall
Residential Distribution Box: Key Features & Typical Use
Four Steel Thickness Grades
The LYM3 offers a broader thickness selection than most boards in this class: 0.7 mm, 0.8 mm, 1.0 mm and 1.2 mm. For a large apartment development that means the cost and the robustness of each enclosure can be tuned to the position — a lighter shell in a protected cupboard, a heavier one in a garage or a service area.From a 4-Way Box to a 40-Way Board
The range starts at the LYM3-4 at 141 x 160 x 90 mm, small enough for a single sub-circuit position, and runs up to the LYM3-40 at 432 x 420 x 90 mm for a full apartment or small office distribution board. A single product family covers both ends, which keeps appearance and wiring practice consistent.Status Visible Without Opening
A frosted PC window in the ABS flame-retardant panel lets breaker status be checked with the cover closed. Combined with the flip-top design, that gives a quick, safe way to confirm whether a circuit has tripped, without exposing the person checking it to the interior of a live board.Consistent Across Recessed and Surface Versions
Recessed models and surface-mounted M-series models share the same panel, window and busbar arrangement, so a project that mixes both — common in renovation work where some walls are new and some are existing — still presents a consistent installation. Each unit ships with the panel, busbar set, 1.0 mm DIN rail and enclosure.Residential Distribution Box Specifications & Technical Data
| Parameter | Details |
|---|---|
| Series | LYM3 residential distribution box |
| Panel | ABS flame-retardant panel with frosted PC observation window |
| Enclosure | Spray-painted cold-rolled steel |
| Cover operation | Flip-top with observation window |
| Way range | 4 ways to 40 ways |
| Row configurations | 1 row and 2 rows |
| Mounting versions | Recessed and surface mounted (M series) |
| Enclosure thickness options | 0.7 mm / 0.8 mm / 1.0 mm / 1.2 mm |
| Standard configuration | Panel, neutral and earth busbar set, 1.0 mm DIN rail, enclosure |
| Smallest model | LYM3-4: 141 x 160 x 90 mm overall |
| Mid-range model | LYM3-16: 360 x 210 x 90 mm overall |
| Largest model | LYM3-40: 432 x 420 x 90 mm overall |
| Compatible devices | Standard DIN-rail circuit breakers |
| Application | Apartments, villas, office fit-outs and renovation projects |
LYM3 — a Residential Distribution Box with Four Thickness Grades
Steel thickness is usually a hidden decision, made on the drawing and never seen again. The LYM3 turns it into a specification choice with four grades — 0.7 mm, 0.8 mm, 1.0 mm and 1.2 mm — so the enclosure behind each front panel can be matched to the position it occupies and the budget the project carries.This equipment is also described as a household consumer unit, a small distribution board or a flip-window breaker box, and it is compared with the wider-format boards in the same range. Its distinguishing feature is that four steel thickness grades are held in production, so a project that mixes protected cupboards with workshop or garage positions can be supplied from one product family without changing the appearance in the rooms that matter.The range runs from the compact LYM3-4 at 141 x 160 x 90 mm, a single sub-circuit position, up to the LYM3-40 at 432 x 420 x 90 mm for a full apartment or small office board. The front is a fire-retardant ABS panel with a frosted PC flip-top window, so breaker status can be checked without opening the cover.Recessed and surface-mounted M-series versions use the same panel and internal busbar arrangement, which matters in renovation work where some walls are new and some are existing. Each box ships with the panel, busbar set, 1.0 mm DIN rail and enclosure, and takes standard DIN-rail breakers.
Factory-Direct Residential Distribution Box Manufacturer & OEM / ODM
We Manufacture, You Brand
LYE Technology (Zhejiang) Co., Ltd. is a national high-tech enterprise and manufacturer in Wenzhou, China: sheet-metal fabrication, welding, powder coating, busbar machining and final assembly run on our own factory lines, and every unit is function-tested before it leaves the works. A LYM3 Residential Distribution Box that reaches your site carries the routine test behind it, not just the rating on the nameplate.We are one of the Top 10 Brands of China's small power distribution boxes and a drafter of national standards in this category, and we hold ISO9001, ISO14001, ISO45001, CCC, CE and TUV certification. Because we are the manufacturer rather than a trading company, our sales engineers quote from your drawing in factory-direct terms, and OEM or ODM work is produced on the same lines as our standard products.For the LYM3 we hold four steel thickness grades in production, so a project that mixes light and heavy positions can be supplied without splitting the order.- OEM branding — custom colours, laser marking and your own project or retail packaging, applied at the factory.
- ODM options — ratings, configurations and internal layouts built around your drawings or single-line diagram.
- Certification — ISO9001, ISO14001, ISO45001, CCC, CE and TUV, with test documents supplied per project.
- MOQ — flexible quantities for a project or a trial order, with mixed types welcome in one shipment.
LYM3 flip-top panel with frosted observation window
Compact LYM3-4 enclosure for a single sub-circuit position
Residential Distribution Box Buying Guide from the Manufacturer
The choice here is usually thickness and size, both driven by the position of the box. These are the points we confirm.
- Count the circuits to fix the way count, including any very small positions needing the 4-way model.
- Confirm the enclosure thickness grade appropriate to each position, from 0.7 mm to 1.2 mm.
- Confirm whether recessed or surface-mounted M-series boxes are needed at each location.
- Confirm the breaker types to be fitted so the rail and depth suit them.
- Send the circuit schedule, floor plan and a note of any exposed or service-area positions.
- Approve the drawing, then production and dispatch.
Manufacturer & Sales Support for Wholesale Buyers
OEM / ODM
Learn more →Factory colours · Logo marking · Custom layout
Wholesale
Learn more →Factory pricing · Flexible MOQ · Global shipping
Distributor Support
Learn more →Account manager · Drawing support · Priority lead times
Matching Distribution Boxes to Each Position?
OEM/ODM, wholesale pricing and distributor support straight from the manufacturer — one enquiry gets you a factory-direct quotation for the LYM3 Residential Distribution Box, sized to your circuit schedule, the mounting position of each box and the thickness grade you have allowed, with type-test documentation under IEC 60670 and the applicable national requirements for household distribution boards. Our sales team replies with a specification and an indicative price, so send your drawings and quantity.Contact Our Sales TeamResidential Distribution Box — Frequently Asked Questions
What is a residential distribution box used for?
It distributes an incoming household or office supply to the final circuits, housing miniature circuit breakers and residual current devices on a DIN rail with neutral and earth bars. The LYM3 covers 4 ways up to 40 ways, from a 141 x 160 x 90 mm single sub-circuit position up to a 432 x 420 x 90 mm board for a full apartment or small office.What steel thickness should a distribution box have?
It depends on the position. A board inside a protected cupboard does not need more than 0.7 mm or 0.8 mm, while one in a garage, utility room or workshop where it may be knocked or handled should use 1.0 mm or 1.2 mm. The LYM3 holds all four grades, so the gauge can be matched position by position within the same project rather than over-specifying every box.What is the difference between a 4-way and a 40-way distribution board?
The way count sets how many single-module devices the board can carry. A 4-way board is used for a small sub-circuit position such as a garden supply or a single equipment point, while a 40-way board serves a whole apartment or small office with spare capacity for later additions. The LYM3 spans both ends of that range in the same product family and with the same wiring layout.Who are the main household distribution board manufacturers?
The category includes international electrical brands and a large group of manufacturers who produce the panel and enclosure themselves. Useful questions are whether the panel is moulded and the enclosure formed by the supplier, which steel thicknesses are actually held, and whether the window aperture and busbar arrangement match the breakers you intend to fit. LYE manufactures the LYM3 in Wenzhou and holds ISO9001, ISO14001, ISO45001, CCC, CE and TUV certification.How much does a residential distribution board cost?
Indicative factory-direct pricing is roughly US$5 to US$80 per unit, depending on the way count, the steel thickness, the mounting version and the quantity ordered. Because several grades are held in production, a project that mixes sizes and thicknesses can be supplied as one order, which keeps the delivered cost lower than buying each position as a separate requisition.
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Use a distribution box for final circuits and compact branch protection; use a cabinet when the project needs larger incoming capacity, more feeder groups, metering, busbars or greater internal separation. The final choice should be checked against the single-line diagram, device list, available installation space and local project rules.
Provide the device schedule, circuit quantity, component dimensions, cable-entry direction, mounting method and required spare capacity. LYE also reviews door clearance, bending radius, heat-producing devices and the usable depth behind the mounting plate before confirming an enclosure size.
Start with the actual exposure to dust, rain, cleaning water and accidental contact rather than choosing the highest number by default. Cable entries, ventilation, door seals and installation workmanship affect the finished assembly, so the target rating and verification basis must be confirmed for the specific product and project.
Coated or galvanized steel is commonly considered for general indoor service, stainless steel for humid or corrosive locations, and engineering plastic for lightweight non-metallic applications. Material grade, thickness, UV exposure, chemical contact and earthing requirements must be confirmed against the installation environment.
Share the component heat load, ambient temperature, solar exposure, duty cycle and allowable internal temperature. LYE can then review enclosure volume, spacing, ventilation or fan provisions, sun shields, heaters or drainage details; the final thermal design remains tied to the installed equipment and site conditions.
Yes. A dimensioned drawing is preferred, but a physical sample and clear reference photographs can also start the review. Material, thickness, openings, hardware, finish, labels, inspection points and packing are recorded before sampling or repeat production.
PDF and common 2D CAD drawings are suitable for most enclosure enquiries, while 3D files can help with complex assemblies. Include a revision number, units, tolerances and component references; file compatibility and any missing production information will be confirmed during review.
A sample or first article can be arranged for a new or customized product. The approval plan should identify dimensions, openings, fit, appearance, hardware, labels and packaging, together with the sample cost and timing agreed for the actual order.
Available documents may include approved drawings, packing lists, dimensional or appearance inspection records, product data and certificates applicable to the confirmed model. Destination-specific declarations or third-party testing must be requested before order placement so availability and scope can be verified.
Lead time is confirmed after the product scope, quantity, sample requirement and finish are known. Packing is reviewed against product weight, surface protection, destination and shipping method; if an issue is found after delivery, send the order reference, label, photographs and quantity affected so it can be traced and reviewed.
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