Customizable Terminal Strip cover

by Ken_Applications, published

Customizable Terminal Strip cover by Ken_Applications Dec 12, 2017
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Customizable terminal strip cover.
New version 2 now works with customizer just click the link below.

or...... open in openscad
Download OpenScad from
Run the file....... Terminal_strip_cover.scad
Change parameters to suit your terminal block
Press F5 Please wait until it compiles the model
Press F6 to save STL file for printing.

The parameters below are for a standard 5 Amp terminal strip (see above photo)

// parameters ////
Num_of_terminals=4; /// [Default 2 .... range [2-12]]
wire_outter_dia=7.3; // [Default.... 7.3 ]
block_width=6.4;/////// [Default.... 6.4 ]
block_gap=3.1;///////// [Default.... 3.1 ]
block_height=13.0;///// [Default.... 13.0 ]
block_length=16;/////// [Default.... 16.0 ]

//please note a small change of the stretch parameter below makes a big difference to the model (eg. try changing 1.7 to 1.65 to see the result)
stretch=1.7;/////////// [Default.... 1.7]

////////// show ///////////////
show_parts=3; // [1= base only 2=cap only ]
num_of_tabs=2; //[0 1 2 default=2]
// tab fixing hole ////////////////////////////
fixing_hole_size=4;//[default 4]
tab_width=12; //[ tab width default value bigger than block_length ]
chamfer=1; // [1=chamfer 0= no chamfer]

Please note
Intended for low voltage applications.
Use at own risk

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Now version 3
Added slots for cable ties
Also increased snap fixing bumps for tighter fitting of lid

That's a great idea, will add the holes for the cable ties in the next couple of days.

Hi, I made one, but the cover does not click-fit to the base. It is too loose.
Also I have another suggestion: Add little holes so that one can use cable-straps to tighten the ends of he cable.

Thanks for pointing out these issues, you got me thinking now.....

Thinking a little bit more on the problem I've got the idea of using silicone.
So ideas would be :
1)enclose whole box in silicone wrap (much silicone needed)
2)enclose just terminal block in silicone - silicone mold for terminal block would be damn cool thing,
and then box enclosing it would be just decoration

can't promise I'll come up with the design soon, but your idea was inspiring!

Good idea.
While i would not be worrying about voltage too much (terminal block should provide enough protection against breakdown)
flame retardation is serious issue. Fire can be started by low voltage too, just lot of current.

Hard to say how to make plastic fire-proof, but given one needs it sometimes,
maybe anyone knows some commercial brands of flame-retardant filament,
or recipes how to make own for ppl owning filament extruders?