NEVER DO WE RECOMMEND WEARING YOUR RADIO STRAP OVER YOUR TURNOUT COAT. THIS CREATES AN ENTANGLEMENT HAZARD AND IS HARSH ON YOUR RADIO AND STRAP.
For proper use with turnout gear place your coat over the strap with your radio hanging over bunker pants. Your strap should be placed where your coat will shed water off of your radio, but yet you can still use knob functions. Pull the collar mic out of your coat through the neck. By doing this you will protect your strap and most importantly your communication device.On this PDF file by Fairfax County Fire & Rescue Department in the Communications Section it has great information on it