insulated joints for Garden RR dcc

My understanding is that tracks running on dcc need to have breaks in the track. My

question is how to determine where such breaks should be place? Is there any standards for where to place the breaks and how many you need?

DCC does not NEED breaks in the track.

Many people do insulate sections of track to help in debugging issues, namely poor power conduction.

I have districts about 30-50 feet long.

How much track, how is the layout configured?

Greg