Here is a 12.5kV pole on the municipal McMinnville Water & Light Dept. in Oregon. The brown hi-top insulator on the neutral wire is re-used from former hot wire installations as a "neutral" or grounded wire marker, and the sky-blue yuks are the new hot wire insulators. The idea is to use a different looking insulator to definately identify the grounded wire. However, as a lineworker, you would have to be a real novice or stupid not to know the difference. Note the odd style fuse cut-out.