Summary

This draws a buildbox with the dimensions of your 3D printer
Based on the build_plate module, see http://www.thingiverse.com/thing:44094
Note : be sure to also install write.scad, see http://www.thingiverse.com/thing:16193

Instructions

In your OpenSCAD file add the following line :
use
this make OpenSCAD aware of the build_box module

Usage:
build_box(rangeX,rangeY,rangeZ,planes,labels);
where:
rangeX = range of 3D printer along X-axis, default=200
rangeY = range of 3D printer along Y-axis, default=200
rangeZ = range of 3D printer along Z-axis, default=200
planes = the planes you want to see, default = "XYZ"
for only Z-plane enter "Z"
labels = true if you want labels, default=true

Then draw the build box by
//build_box(200,200,200,"XYZ",true);
//build_box(200,200,200,"Z",false); // buildplate
//build_box(200,200,200);
//build_box(200);
build_box();
color("red")
cube([5,4,200],center=false);

Build Box