Product Overview
One Inlet Eighteen Outlet Block takes a single 10–70 mm² copper feed and splits it across eighteen branch circuits on one rail-mounted body. Input is rated 125 A continuous at 400 V AC.
Dense cabinets go wrong in the detail: eighteen identical terminals look alike, and tracing one faulty run costs half a shift. Here the outlets sit in stepped rows instead of a flat bank, with a numbered marking area on every circuit.
The bar inside is sized so current divides evenly across all eighteen tap points, and the vented housing clears the heat. Any single branch can be re-terminated without disturbing the other seventeen.
Internal Structure & Heat Dissipation Design
Standard configuration for the 125 A eighteen-outlet version; confirm the marked rows against your drawing.
| Parameter | Value |
|---|---|
| Configuration | 1 inlet / 18 outlets |
| Maximum Total Input Current | 125 A continuous duty |
| Maximum Per-Outlet Current | 16 A per circuit |
| Inlet Wire Range | 10 mm² – 70 mm², solid or stranded copper |
| Outlet Wire Range | 1.5 mm² – 16 mm², solid or stranded copper |
| Rated Voltage | 400 V AC |
| Insulation Resistance | > 100 MΩ at 500 V DC |
| Dielectric Withstand Voltage | 2.5 kV AC for 1 minute |
| Load Basis | 125 A is the continuous total for the block; 16 A is the capacity of one outlet, not a simultaneous total for all eighteen |
| Conductor | High-conductivity copper bar, tin-plated - series reference, confirm |
| Housing | Flame-retardant engineering plastic, UL94 V-0 - grade to confirm, the series pages list both ABS and PA66+GF30 |
| Mounting | 35 mm DIN rail or screw fixation - confirm for your cabinet |
| Torque Reference | Inlet M8: 8–12 N·m; outlet M4: 1.5–2.5 N·m - series reference, confirm |
| Circuit Identification | Stepped terminal rows with a numbered marking area on every circuit |
| Design Reference | IEC 60947-7-1 - series reference, confirm against the test report before publishing |
| Customization | Custom labeling, mounting hole patterns and modified circuit configurations per drawing |
| MOQ | 10 pieces |
| Lead Time | 7–10 days standard orders; 15–20 days custom orders |
| Quality Guarantee | 12–24 months from shipment date |
| Manufacturing Standard | ISO 9001 quality management system |
| Packaging | 20 pieces per carton; 4.8 kg gross per carton; carton 32 × 24 × 18 cm |
| Delivery Ports | Ningbo Port / Shanghai Port |
| Quote Turnaround | Within 24 hours |
Core Advantages
Four things that decide whether eighteen circuits stay workable in one cabinet.
Stepped Rows, Not A Flat Bank
Raising alternate rows keeps every clamping point within screwdriver reach, so a terminal mid-block can be torqued without moving neighbouring wires.
01
A Numbered Area Per Circuit
Each of the eighteen positions has its own writable number area, so a circuit is identified by position rather than by a tag that falls off.
02
Balanced Bar, Vented Housing
The bar is sized so current spreads across all eighteen tap points instead of crowding the ends, and the vented housing releases the heat.
03
One Branch Re-Terminated Alone
A single outlet can be loosened, re-wired and re-torqued without touching the other seventeen, which keeps fault-finding short.
04
Wire Cage Terminal vs Traditional Brass Terminal
The difference shows at wiring time, and again at the first fault.
| Point Of Comparison | Wire Cage Terminal (This Block) | Traditional Brass Terminal |
|---|---|---|
| Circuit identification | Stepped rows with a numbered marking area per circuit | Flat bank of identical positions; relies on loose tags |
| Tracing a fault | Position and number identify the run at a glance | Every branch must be tested in turn |
| Inlet wiring | 10–70 mm² copper lands in a cage from the front | Thick cable must be formed to reach a round post |
| Clamping | Cage closes over the full conductor | Pressure applied at a single screw point |
| Re-working one branch | Any of the 18 outlets can be re-terminated alone | Rewiring one feed often disturbs its neighbours |
| Cabinet width | 18 branches in one body, no inter-block wiring | Several smaller blocks wired together |
| Heat at full load | Bar sized for even current spread plus vented housing | Depends on how the smaller blocks were loaded |
Professional Production Process
Six steps, with electrical results recorded per batch.
Copper bar cut and punched to the drawing.
Deburring and edge chamfering ahead of plating.
Tin plating of the conductive parts.
Housing moulded to the UL94 V-0 flame rating.
Bar, cages and terminals assembled in register across all eighteen positions.
Routine test: above 100 MΩ at 500 V DC, 2.5 kV AC for one minute.
Material & Surface Treatment Options
Two choices are worth settling before the order.
Tin-Plated Copper Conductive Parts
The bar and cages are copper with tin plating, which holds contact resistance down and resists the tarnish bare copper collects in a damp enclosure.
Flame-Retardant Housing
The body is flame-retardant engineering plastic rated UL94 V-0, with the numbering areas moulded in so circuit labels survive wiping and service work.
Application Scenarios
Three places where a 1-in / 18-out block earns its rail space.
Multi-Storey Metering Cabinets
Eighteen meters stacked over several floors is the natural fit: one feed in, one branch per meter, and a numbered row that lets a supply be traced without pulling the panel apart.
High-Density Control Cabinets
Where a cabinet concentrates feeders on limited rail, eighteen branches from one body take less width than three or four blocks, with no wiring between them.
Retail And Standard Floors
The same block serves a retail floor of eighteen shops, a building with one unit per floor, and industrial standard floors feeding many separate loads.
Frequently Asked Questions
Q: What is an 18-way distribution block used for?
A: It distributes one incoming line of 10–70 mm² copper to eighteen separate branch circuits from a single rail-mounted body, which is how a multi-storey meter cabinet is fed without stacking smaller blocks.
Q: How are eighteen circuits kept apart during maintenance?
A: The outlets sit in stepped rows and each position has a numbered marking area, so a circuit is identified by position and number. One branch can be re-terminated without disturbing the other seventeen.
Q: What are the electrical ratings?
A: 125 A continuous total at 400 V AC, 16 A available at any one outlet. Insulation resistance is above 100 MΩ at 500 V DC, dielectric withstand 2.5 kV AC for one minute. The 16 A is one terminal's capacity, not 18 × 16 A at once.
Q: What cable sizes and mounting does it accept?
A: Inlet 10–70 mm² solid or stranded copper, outlets 1.5–16 mm². The series mounts on 35 mm DIN rail or by screw fixation - confirm which suits your cabinet.
Q: Do you support customization, and what is the MOQ?
A: Custom labeling, mounting hole patterns and modified circuit configurations are made to your drawing. MOQ is 10 pieces; standard orders ship in 7–10 days, custom orders in 15–20 days. Send your drawing for a quote within 24 hours.
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