Free engineering tool

Junction box, marshalling cabinet & terminal strip drawings without CAD

Enter cable and core details once, generate the terminal arrangement, then print a termination diagram, terminal schedule and commissioning site sheet from the same project data.

Use current project

No account required. Project data is stored in this browser unless you export it.

1. Enter cables

Define incoming and outgoing cores, functions and panel references.

2. Build the JB

Generate terminals, assign rails and adjust anything that differs on site.

3. Print the job

Create the diagram, terminal schedule and three-point commissioning sheet.

Designed for electricians and instrumentation engineers. Generated drawings should be checked by a competent person before construction or commissioning. How it works

Practical guides

Useful references before you start

Junction box termination drawing

What to record and how the generated drawing links incoming cores, terminals and field devices.

Read guide →

Marshalling cabinet drawing

Use multiple rails, panel references and terminal data to document a cabinet layout.

Read guide →

Terminal schedule template

Build a printable terminal schedule and commissioning sheet from the same project data.

Read guide →

Junction box

Tag / nameLocationDescription

RevisionDrawn by

Notes

Cables

Direction	Cable tag	Description	Destination	Cores	PE	Screen	Core details

Terminal strip — 36 terminals

Rails

Manual bulk core assignment

Use this to assign a run of cores from one cable onto existing terminal rows.

CableFirst coreStart terminalHow many

Include PE / screen coresOverwrite existing

Rail	No.	Type	Incoming core	Function / wire label	Outgoing core	Link