This is a simple clip to hold a power cable along the guardrail - either the lines or the stanchion posts, pushpit or pulpit.
The test piece pictured is printed in PETG and had no problem bending to clip around the 25mm tube. Just make sure to print solidly. Should also work fine with PLA or ABS/ASA.
The cable part is a bit tight if you are using 3x2.5mm² cable. In that case you might want to give the "fatso" verison a try.
power_line_railing_clip.FCStd | 46.8KB | |
power_line_railing_clip.stl | 581.1KB | |
power_line_railing_clip_-_fatso.stl | 571.2KB |