# The choice of accessories for the electrical panel for a private house and sauna

Good afternoon, there is an input network - from an automatic machine - 3ph C 40A on a pole. In your home: we have 1 entrance shield and 2 floor guards.

In the entry plate:

as the first option - set the 3ph Dif machine 30mA, they say that at 15mA the leakage current it already turns off. Suppose the load is up to 3.5 kW = (16A * 0.4mA) = 6.4mA total leakage current. If you take the cable to the maximum, the whole one I buy (1000m * 10mkA / 3) = 3mA per phase (0.4mA at 1A and 10mkA at 1meter taken from open sources). Separately, I want to power - an electric oven, a sauna on my 3ph differential machine 40A 30mA

Questions:
1) Is it possible to put three single-phase Dif machines in the input panel instead of a 3-phase Dif, after them 3 single-phase Voltage Relays, and then combine in one cable for example VvG-P-ng (LS) 5 × 6 (N, 1ph, 2ph , 3ph, PE)? And transfer to the floor shields, and there to distribute the load. Will it be right? or is it better to use three-phase and Dif and Voltage relays in the input panel?

2) Is it possible to combine three phases zero and ground in one cable?

3) Have I made the calculation of leakage currents correctly and will the Dif machine not knock out and will it perform its functions?

4) If the three-phase stove in the sauna 9 kW - ((9000/380) * 0.4) = 9.6 mA leakage current,
and 5kW single-phase oven - ((5000/380) * 0.4) = 9 mA leakage current.

It turns out they can not be included together, eating through one differential power supply?

Does a three-phase differential current have a leakage current of 30 mA on each phase? those. 9.6 need to be divided into three more?

5) Do I understand correctly that the leakage current will only be on the cable under load?

6) For an electric oven from a floor plate I’m going to forward a separate 4kv cable, a 24A machine and a special outlet.

Is this enough for a 5kW oven or is it better to throw a 6kv cable and a 32A machine?