Q: need to know what criteria do you consider to select Thermostats locations when you design electric heat tracing system ? To clarify my question more, suppose all tracer cables were installed on pipes of a project , now which parts of pipes do need to be protected by thermostats? If there is a valve in pipe line, should I put two thermostats on this pipe , each thermostat one side of valve? Kindly teach me in very simple language. Ali Rez Abdulhossein
Following link is useful frequently asked questions from Tyco Thermal which help answer your question.
The picture helps you to locate thermostats, power connection, end seals...very clear, I hope. Usually location is determined by designer so it is vary.