How to connect 50 instant electric water heaters in the hotel?

1 and 50 sets of 8000W single-phase electric water heaters should consider three-phase balance, that is, L 1 phase: 17 sets; L2 phase, 17 units; L3, 16 sets.

2. The maximum power of L1phase is 136KW, and the calculated current is about 2 10A. The trunk line shall be 95mm2 conductor.

3. Because the ammeter can't be directly connected to the 95mm2 conductor, a transformer should be used. You can choose 150/5 transformer with 3(6)A meter.

4. Master switch selection 225A；;

5. Trunk lines should use 3*95+ 1*50 cables or plastic copper-core flexible wires;

6, layer line can choose 50mm2 or 70mm2 conductor;

7. Since the simultaneous coefficient is not considered, the above data are for reference only, and the conductor can be appropriately enlarged or reduced.