Wiring a Finnleo sauna is not a complicated task, but you should always use a licensed electrician and comply with both local and National electric code (NEC).
One of the benefits to buying a custom cut sauna kit from us is that your kit includes the sauna heater and every wiring component short of the actual building power supply and the correct wire size to run from the heater to contactor box.
All of the wiring in your Finnleo sauna works with a standalone contactor box and making connections is simple. Again, you should always use a licensed electrician to make connections in both your contactor box and at the heater itself.
The diagram below shows a layout of the wiring in any Finnleo custom sauna.
